2001 FAIRBANKS, ALASKA (FAI)



Fairbanks is located in the Tanana Valley, in the interior of Alaska. It has a distinctly continental climate, with large variation of temperature from winter to summer.

The climate in Fairbanks is conditioned mainly by the response of the land mass to large changes in solar heat received by the area during the year. The sun is above the horizon from 18 to 21 hours during June and July. During this period, daily average maximum temperatures reach the lower 70s. Temperatures of 80 degrees or higher occur on about 10 days each summer. In contrast, from November to early March, when the period of daylight ranges from 10 to less than 4 hours per day, the lowest temperature readings normally fall below zero quite regularly. Low temperatures of −40 degrees or colder occur each winter. The range of temperatures in summer is comparatively low, from the lower 30s to the mid 90s. In winter, this range is larger, from about 65 below to 45 degrees above. This large winter range of temperature reflects the great difference between frigid weather associated with dry northerly airflow from the Arctic to mild temperatures associated with southerly airflow from the Gulf of Alaska, accompanied by chinook winds off the Alaska Range, 80 miles to the south of Fairbanks.

Snow cover is persistent in Fairbanks, without interruption, from October through April. Snowfalls of 4 inches or more in a day occur only three times during winter. Blizzard conditions are almost never seen, as winds in Fairbanks are above 20 miles an hour less than 1 percent of the time. Precipitation normally reaches a minimum in spring, and a maximum in August, when rainfall is common. During summer, thunderstorms occur in Fairbanks on an average of about eight days. Thunderstorms are about three times more frequent over the hills to the north and east of Fairbanks. Damaging hail or wind rarely accompany thunderstorms around Fairbanks.

There are rolling hills reaching elevations up to 2,000 feet above Fairbanks to the north and east of the city. During winter, the uplands are often warmer than Fairbanks, as cold air settles into the valley. In some months, temperatures in the uplands will average more than 10 degrees warmer than Fairbanks. During summer, the uplands are a few degrees cooler than the city. Precipitation in the uplands around Fairbanks is heavier than it is in the city by roughly 20 to 50 percent. Fairbanks exhibits an urban heat island, especially during winter. Low lying areas nearby, such as the community of North Pole, are often colder than the city, sometimes by as much as 15 degrees.

During winter, with temperatures of −20 degrees or colder, ice fog frequently forms in the city. Cold snaps accompanied by ice fog generally last about a week, but can last three weeks in unusual situations. The fog is almost always less than 300 feet deep, so that the surrounding uplands are usually in the clear, with warmer temperatures. Visibility in the ice fog is sometimes quite low, and this can hinder aircraft operations for as much as a day in severe cases. Aside from the low visibility in winter ice fog, flying weather in Fairbanks is quite favorable, especially from February through May, when crystal clear weather is common and the length of daylight is rapidly increasing.

Hardy vegetables and grains grow luxuriantly. Freezing of local rivers normally begins in the first week of October. The date when ice will normally support a persons weight is October 27. Rivers remain frozen and safe for travel until early April. Breakup of the river ice usually occurs in the first week of May.

NORMALS, MEANS, AND EXTREMES

FAIRBANKS, AK (FAI)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 26411

64 49′ 00″ N  147 51′ 18″ W  GRND: 461 BARO: 464  ALASKA (UTC + 9)

2001 Fairbanks, Alaska (FAI)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 –1.6 7.2 23.8 41.0 59.3 70.1 72.3 66.3 54.8 32.0 10.9 1.8 36.5
MEAN DAILY MAXIMUM 53 –1.1 7.5 24.1 42.1 59.6 70.5 72.2 66.1 54.4 31.9 11.2 1.0 36.6
HIGHEST DAILY MAXIMUM 50 50 47 56 74 89 96 94 93 84 65 49 45 96
YEAR OF OCCURRENCE 1981 1987 1994 1960 1960 1969 1975 1994 1957 1969 1997 1999 JUN 1969
MEAN OF EXTREME MAXS. 53 29.0 33.0 44.6 59.7 74.6 83.9 85.3 80.5 68.8 51.5 34.3 29.9 56.3
NORMAL DAILY MINIMUM 30 –18.5 –14.4 –1.7 20.4 38.0 49.5 52.6 47.2 36.2 18.1 –5.6 –14.8 17.2
MEAN DAILY MINIMUM 53 –18.8 –14.6 –2.6 20.1 37.4 48.8 51.7 46.5 35.4 16.8 –5.1 –15.9 16.6
LOWEST DAILY MINIMUM 50 -61 -58 -49 -24 –1 31 35 27 3 -27 -46 -62 -62
YEAR OF OCCURRENCE 1969 1993 1956 1986 1964 1963 1959 1987 1992 1992 1990 1961 DEC 1961
MEAN OF EXTREME MINS. 53 –43.5 –38.3 –26.6 –2.7 26.1 38.4 42.7 34.5 22.4 –5.9 –27.8 –39.7 –1.7
NORMAL DRY BULB 30 –10.1 –3.6 11.0 30.7 48.6 59.8 62.5 56.8 45.5 25.1 2.7 –6.5 26.9
MEAN DRY BULB 53 –10.0 –3.6 10.9 31.2 48.4 59.7 62.1 56.1 44.8 24.5 3.1 –7.6 26.6
MEAN WET BULB 13 –2.9 –1.5 10.8 28.4 41.4 52.5 55.9 51.5 40.6 21.0 .2 –1.1 24.7
MEAN DEW POINT 13 –6.0 –6.7 3.1 18.2 30.3 44.4 50.0 46.9 35.8 17.0 –3.9 –4.6 18.7
NORMAL NO. DAYS WITH:
MAXIMUM 70 30 0.0 0.0 0.0 0.1 4.2 17.0 21.5 10.9 1.5 0.0 0.0 0.0 55.2
MAXIMUM 32 30 29.8 25.8 21.5 6.6 0.1 0.0 0.0 0.0 0.1 15.9 28.1 29.5 157.4
MINIMUM 32 30 31.0 28.0 30.9 26.8 6.2 * 0.0 0.6 8.7 28.4 30.0 31.0 221.6
MINIMUM 0 30 25.6 22.2 16.7 2.5 * 0.0 0.0 0.0 0.0 3.6 19.2 24.2 114.0
H/C NORMAL HEATING DEG. DAYS 30 2328 1921 1674 1029 508 182 123 267 585 1237 1869 2217 13940
NORMAL COOLING DEG. DAYS 30 0 0 0 0 0 26 45 13 0 0 0 0 84
RH NORMAL (PERCENT) 30 69 66 60 56 50 56 64 71 69 74 73 71 65
HOUR 03 LST 30 69 67 66 66 65 73 79 84 79 77 73 71 72
HOUR 09 LST 30 69 67 65 60 53 61 69 78 76 78 73 71 68
HOUR 15 LST 30 69 63 52 45 37 42 50 54 54 66 72 71 56
HOUR 21 LST 30 69 66 61 53 45 49 58 68 69 75 73 71 63
S PERCENT POSSIBLE SUNSHINE
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 50 4.3 2.4 0.5 0.3 0.2 0.3 0.8 1.7 1.4 1.7 1.2 2.8 17.6
THUNDERSTORMS 50 0.0 0.0 0.0 0.0 0.4 3.0 2.4 0.9 0.1 0.0 0.0 0.0 6.8
CLOUDINESS MEAN:
SUNRISE–SUNSET (OKTAS) 45 5.0 5.0 4.7 5.3 5.5 5.8 5.9 6.2 6.1 6.3 5.5 5.6 5.6
MIDNIGHT–MIDNIGHT (OKTAS) 32 4.8 4.5 4.4 5.0 5.4 5.8 5.9 6.0 5.8 6.0 5.2 5.2 5.3
MEAN NO. DAYS WITH:
CLEAR 46 9.1 8.1 9.9 6.7 4.6 3.0 3.3 2.8 4.1 3.8 6.8 6.7 68.9
PARTLY CLOUDY 46 5.9 6.0 7.0 7.9 11.0 10.4 8.9 6.8 6.1 4.9 5.0 5.7 85.6
CLOUDY 46 16.0 14.2 14.1 15.4 15.4 16.6 18.2 20.9 19.3 21.5 17.6 18.0 207.2
PR MEAN STATION PRESSURE(IN) 27 29.39 29.37 29.31 29.30 29.32 29.32 29.40 29.40 29.30 29.22 29.31 29.31 29.33
MEAN SEA–LEVEL PRES. (IN) 16 29.84 29.94 29.88 29.83 29.84 29.86 29.92 29.89 29.81 29.80 29.85 29.78 29.85
WINDS MEAN SPEED (MPH) 45 3.1 3.8 5.1 6.4 7.5 6.9 6.5 6.0 6.0 5.1 3.6 3.0 5.2
PREVAIL. DIR (TENS OF DEGS) 29 02 01 36 36 36 24 23 22 36 36 36 04 36
MAXIMUM 2–MINUTE:
SPEED (MPH) 4 23 30 29 28 30 25 30 25 23 20 22 21 30
DIR. (TENS OF DEGS) 13 07 26 26 12 08 26 01 26 28 05 25 07
YEAR OF OCCURRENCE 2001 2001 1998 1999 1998 1999 1999 2000 1998 1998 1999 1999 FEB 2001
MAXIMUM 5–SECOND:
SPEED (MPH) 4 36 38 34 36 37 32 40 32 28 24 25 24 40
DIR. (TENS OF DEGS) 12 06 27 21 11 07 27 01 25 29 05 08 27
YEAR OF OCCURRENCE 2001 2001 1998 1998 1998 2000 1999 2000 1998 1998 1999 2000 JUL 1999
PRECIPITATION NORMAL (IN) 30 0.47 0.40 0.37 0.32 0.61 1.37 1.87 1.96 0.95 0.90 0.80 0.85 10.87
MAXIMUM MONTHLY (IN) 50 2.40 1.75 2.24 0.93 1.67 3.52 4.87 6.20 3.05 2.19 3.32 3.23 6.20
YEAR OF OCCURRENCE 1993 1966 1991 1982 1955 1955 1990 1967 1960 1983 1970 1984 AUG 1967
MINIMUM MONTHLY (IN) 50 0.01 0.01 T T 0.07 0.19 0.35 0.40 0.15 0.08 T T T
YEAR OF OCCURRENCE 1966 2000 1987 1991 1957 1966 1993 1957 1968 1954 1953 1969 APR 1991
MAXIMUM IN 24 HOURS (IN) 50 0.75 0.97 1.17 0.47 0.88 1.52 1.73 3.42 1.21 2.22 0.84 1.25 3.42
YEAR OF OCCURRENCE 1993 1966 1991 1979 1955 1955 1990 1967 1954 1976 1970 1968 AUG 1967
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 7.2 6.1 5.8 5.4 7.5 11.1 12.9 12.4 9.4 11.6 10.8 9.5 109.7
PRECIPITATION 1.00 30 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.1 0.0 0.0 0.0 0.0 0.4
SNOWFALL NORMAL (IN) 30 8.9 8.4 6.5 3.8 0.5 0.0 0.0 T 1.0 11.7 15.1 14.9 70.8
MAXIMUM MONTHLY (IN) 50 40.2 43.1 30.4 11.5 14.1 T T 0.1 24.4 25.9 54.0 50.7 54.0
YEAR OF OCCURRENCE 1993 1966 1991 1992 1992 1993 1990 1995 1992 1982 1970 1984 NOV 1970
MAXIMUM IN 24 HOURS (IN) 50 10.1 20.1 12.6 6.3 9.4 T T 0.1 9.0 10.4 14.6 14.7 20.1
YEAR OF OCCURRENCE 1993 1966 1963 1992 1992 1993 1990 1995 1992 1974 1970 1968 FEB 1966
MAXIMUM SNOW DEPTH (IN) 52 46 52 54 49 14 0 0 0 12 16 42 46 54
YEAR OF OCCURRENCE 1993 1966 1991 1991 1991 1992 1982 1970 1990 MAR 1991
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 2.8 2.3 2.3 1.2 0.2 0.0 0.0 0.0 0.3 4.2 5.1 4.5 22.9

2001 Fairbanks, Alaska (FAI)

PRECIPITATION (inches) 2001 FAIRBANKS, AK (FAI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.73 0.16 0.27 0.20 0.35 0.55 0.63 1.09 2.08 0.86 0.46 1.13 8.51
1973 0.44 0.11 0.40 0.05 0.99 0.97 1.92 2.19 0.19 0.91 0.80 0.15 9.12
1974 0.14 0.33 0.27 0.21 0.11 1.22 1.17 1.14 0.47 1.08 1.03 0.55 7.72
1975 0.60 0.04 0.22 0.47 0.49 0.99 1.81 2.10 0.20 0.79 0.44 0.31 8.46
1976 0.22 0.01 0.55 0.08 0.94 1.08 1.60 0.69 1.05 0.89 0.13 0.08 7.32
1977 0.31 0.81 0.26 0.36 1.63 3.01 1.58 0.41 2.51 1.11 0.19 0.80 12.98
1978 0.39 0.19 0.09 0.16 0.44 1.71 1.19 1.24 0.98 0.59 1.02 1.40 9.40
1979 0.58 0.02 0.47 0.83 0.88 1.54 2.54 1.22 0.19 0.94 0.63 0.49 10.33
1980 0.52 0.22 0.13 0.10 0.31 1.38 1.37 1.68 0.76 0.39 0.70 0.32 7.88
1981 0.31 0.78 0.07 0.32 0.73 1.91 2.41 1.35 0.80 0.91 0.91 0.58 11.08
1982 0.34 0.38 0.39 0.93 0.96 1.96 2.33 1.67 0.77 1.48 1.49 0.23 12.93
1983 0.24 0.18 0.09 0.27 0.14 0.57 1.71 3.33 0.92 2.19 0.08 0.65 10.37
1984 0.89 0.64 0.03 0.47 1.17 0.48 2.95 1.15 0.22 0.70 0.42 3.23 12.35
1985 0.52 0.48 0.57 0.36 0.41 1.80 1.13 1.88 2.59 1.00 0.90 0.08 11.72
1986 0.13 0.19 0.32 0.07 0.54 0.87 2.12 2.36 0.65 1.79 0.48 0.34 9.86
1987 0.68 0.10 T 0.05 0.21 1.02 1.70 0.56 0.57 0.39 0.64 0.51 6.43
1988 0.32 0.13 0.13 0.21 1.51 2.26 1.02 1.95 0.73 1.07 0.68 0.46 10.47
1989 0.52 0.98 0.13 0.05 0.99 2.53 0.91 0.78 0.72 1.28 0.97 0.57 10.43
1990 0.52 0.72 0.11 0.07 0.40 1.73 4.87 3.60 1.74 0.31 1.51 2.94 18.52
1991 1.17 0.17 2.24 T 0.10 0.36 0.81 1.18 1.16 0.71 0.48 1.02 9.40
1992 0.85 0.66 0.07 0.47 1.23 2.15 2.32 0.59 1.34 0.91 0.93 1.21 12.73
1993 2.40 0.31 0.26 0.03 0.63 1.24 0.35 1.58 2.63 0.61 0.86 0.43 11.33
1994 0.47 0.32 0.17 0.07 0.22 2.41 1.11 1.38 0.61 0.82 1.67 0.48 9.73
1995 0.25 0.29 0.18 0.17 0.73 1.91 1.32 2.10 1.33 0.31 0.20 0.06 8.85
1996 0.32 1.40 0.53 0.05 0.14 1.56 1.07 2.83 1.06 1.13 0.81 0.46 11.36
1997 0.25 0.34 0.06 0.01 0.07 1.03 1.08 1.70 0.48 0.94 0.26 0.52 6.74
1998 0.08 0.11 T 0.05 0.41 1.33 3.35 3.18 1.19 0.27 0.21 0.56 10.74
1999 0.22 0.21 0.19 0.04 0.31 1.30 2.11 1.85 1.83 0.90 0.58 0.73 10.27
2000 1.97 T 0.10 T 0.74 0.72 1.29 3.04 1.48 0.91 0.37 0.16 10.78
2001 0.40 0.66 0.43 0.16 0.62 0.65 2.45 2.01 0.25 0.55 0.06 0.24 8.48
POR=72 YRS 0.68 0.46 0.40 0.27 0.64 1.38 1.80 2.13 1.00 0.79 0.68 0.59 10.82

2001 Fairbanks, Alaska (FAI)

AVERAGE TEMPERATURE (F) 2001 FAIRBANKS, AK (FAI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 –16.3 –10.1 –2.8 20.8 47.4 59.4 64.5 58.9 40.1 26.8 7.0 –2.5 24.4
1973 –18.2 –1.5 11.9 35.3 50.6 60.3 62.0 55.0 47.3 25.1 –.7 –3.4 27.0
1974 –16.7 –17.8 7.6 34.9 51.4 58.7 63.5 59.1 51.4 21.4 0.6 –11.3 25.2
1975 –15.5 –3.4 12.6 30.5 53.5 63.4 68.4 56.1 45.8 23.9 –8.0 –16.1 25.9
1976 –11.5 –13.7 12.1 36.0 47.8 59.6 61.8 59.2 45.4 23.9 15.9 –3.9 27.7
1977 9.8 8.6 4.6 27.8 48.7 59.6 62.8 62.6 45.6 25.6 –7.6 –14.9 27.8
1978 0.1 3.9 14.0 34.8 50.2 54.6 63.5 59.5 46.8 23.3 8.6 3.3 30.2
1979 –7.7 –25.3 12.0 30.9 49.9 57.4 61.3 60.4 46.5 32.4 20.2 –10.2 27.3
1980 –9.5 16.0 17.3 35.9 50.7 56.5 60.9 53.6 43.0 33.0 11.5 –24.0 28.7
1981 18.1 5.1 27.1 31.4 51.3 58.9 56.5 53.6 44.1 29.5 12.3 –4.2 32.0
1982 –18.0 –3.9 13.1 27.7 46.8 58.5 63.1 56.6 49.3 18.5 4.4 2.2 26.5
1983 –11.0 3.4 13.8 37.4 50.4 62.3 64.2 53.5 41.2 23.6 8.6 –3.7 28.6
1984 –5.9 –13.3 21.6 30.3 47.2 61.6 60.9 53.8 46.8 25.9 0.1 –3.1 27.2
1985 11.1 –9.4 14.6 20.8 46.7 57.8 63.1 56.3 42.9 18.8 –4.7 7.7 27.1
1986 –2.1 4.7 6.0 24.0 47.8 62.6 63.6 54.7 46.3 27.1 0.2 7.3 28.5
1987 0.7 1.5 13.5 35.0 50.9 61.9 64.2 57.7 44.1 33.0 6.0 –3.2 30.4
1988 –5.3 3.9 17.8 33.6 52.8 62.9 65.8 58.4 44.4 17.4 –3.1 4.2 29.4
1989 –21.3 3.4 6.7 36.2 47.8 60.1 64.6 60.8 48.6 26.2 –7.1 4.5 27.5
1990 –12.9 –21.7 18.5 38.1 55.1 61.6 65.3 60.0 44.8 24.1 –4.9 –6.3 26.8
1991 –4.7 –1.2 11.9 35.4 51.2 63.8 60.6 54.4 48.0 24.9 0.6 –2.9 28.5
1992 –4.7 –8.7 14.0 26.1 41.8 60.0 64.1 56.5 31.7 17.5 10.4 –7.6 25.1
1993 –3.9 2.4 17.2 41.1 53.7 62.0 65.6 56.1 44.1 29.3 8.4 0.6 31.4
1994 –1.5 –6.4 10.5 34.7 51.6 58.4 64.7 59.6 43.7 21.0 0.3 –8.5 27.3
1995 –9.4 –.2 3.8 40.1 53.5 60.9 63.1 57.3 52.8 28.0 –2.7 –9.0 28.2
1996 –16.8 –2.6 15.5 33.3 49.1 59.5 63.4 53.4 42.0 13.2 –1.9 –13.4 24.6
1997 –16.2 13.0 4.7 35.4 49.0 63.1 64.9 58.7 49.7 17.5 10.6 –7.0 28.6
1998 –13.6 2.1 18.4 38.6 50.0 58.8 62.7 53.0 46.1 26.1 5.0 –5.8 28.5
1999 –17.0 –16.7 7.2 32.7 46.9 61.4 61.5 58.0 45.2 19.5 –4.7 –12.8 23.4
2000 –9.9 6.7 17.6 31.9 44.4 61.5 59.6 51.7 41.7 22.3 8.7 0.3 28.0
2001 7.8 7.0 9.9 33.3 44.5 61.1 60.0 57.3 47.5 22.0 0.6 –10.5 28.4
POR=72 YRS –10.1 –3.1 10.2 30.7 48.0 59.3 61.4 55.6 44.6 25.2 3.0 –7.8 26.4

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

2001 Fairbanks, Alaska (FAI)

HEATING DEGREE DAYS (base 65 F) 2001 FAIRBANKS, AK (FAI)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 63 184 738 1177 1739 2091 2582 1864 1637 883 439 150 13547
1973–74 111 302 523 1231 1968 2124 2535 2322 1778 895 414 188 14391
1974–75 85 195 402 1342 1935 2370 2497 1918 1620 1028 347 69 13808
1975–76 33 270 570 1270 2195 2513 2372 2285 1631 861 527 156 14683
1976–77 116 188 583 1269 1466 2136 1709 1574 1871 1107 500 155 12674
1977–78 101 124 573 1216 2184 2480 2013 1712 1576 898 454 304 13635
1978–79 65 176 542 1286 1689 1912 2260 2533 1638 1018 463 220 13802
1979–80 124 143 548 1004 1336 2335 2312 1415 1475 868 436 248 12244
1980–81 127 351 654 985 1599 2766 1447 1676 1168 999 418 188 12378
1981–82 255 347 622 1094 1573 2150 2581 1929 1602 1113 555 216 14037
1982–83 86 252 465 1434 1816 1946 2356 1725 1581 823 451 133 13068
1983–84 62 351 705 1280 1688 2126 2201 2277 1338 1035 549 120 13732
1984–85 140 344 538 1205 1950 2111 1666 2086 1558 1321 558 215 13692
1985–86 72 267 654 1430 2095 1776 2079 1686 1825 1224 527 113 13748
1986–87 110 312 559 1169 1943 1787 1994 1776 1594 893 428 128 12693
1987–88 61 218 620 987 1768 2111 2185 1768 1455 934 371 96 12574
1988–89 39 202 611 1469 2045 1883 2676 1722 1804 859 529 149 13988
1989–90 73 134 484 1195 2164 1875 2420 2433 1431 798 310 127 13444
1990–91 74 178 600 1261 2097 2212 2161 1849 1640 877 421 130 13500
1991–92 143 321 504 1234 1935 2105 2163 2140 1577 1160 711 157 14150
1992–93 45 259 995 1463 1636 2253 2134 1751 1478 711 343 103 13171
1993–94 43 273 620 1099 1694 1995 2061 2002 1689 900 408 210 12994
1994–95 56 217 634 1357 1941 2280 2310 1827 1896 739 354 143 13754
1995–96 92 235 365 1141 2033 2299 2541 1962 1528 946 486 171 13799
1996–97 71 353 681 1600 2010 2424 2509 1450 1862 880 485 106 14431
1997–98 40 204 453 1467 1624 2224 2429 1755 1437 786 460 199 13078
1998–99 103 365 563 1200 1793 2188 2535 2282 1784 963 553 131 14460
1999–00 147 221 584 1403 2084 2403 2315 1680 1467 987 631 112 14034
2000–01 165 407 693 1318 1682 2001 1764 1616 1701 940 629 126 13042
2001– 164 231 521 1326 1926 2333

2001 Fairbanks, Alaska (FAI)

COOLING DEGREE DAYS (base 65 F) 2001 FAIRBANKS, AK (FAI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 0 40 55 0 0 0 0 0 95
1973 0 0 0 0 0 13 24 2 0 0 0 0 39
1974 0 0 0 0 1 9 44 20 0 0 0 0 74
1975 0 0 0 0 0 28 146 1 0 0 0 0 175
1976 0 0 0 0 0 2 23 14 0 0 0 0 39
1977 0 0 0 0 0 0 44 54 0 0 0 0 98
1978 0 0 0 0 0 0 27 10 0 0 0 0 37
1979 0 0 0 0 0 0 16 7 0 0 0 0 23
1980 0 0 0 0 0 0 8 6 0 0 0 0 14
1981 0 0 0 0 1 11 0 2 0 0 0 0 14
1982 0 0 0 0 0 27 36 0 0 0 0 0 63
1983 0 0 0 0 5 61 40 0 0 0 0 0 106
1984 0 0 0 0 0 22 21 2 0 0 0 0 45
1985 0 0 0 0 0 8 20 4 0 0 0 0 32
1986 0 0 0 0 0 46 74 0 0 0 0 0 120
1987 0 0 0 0 0 42 42 0 0 0 0 0 84
1988 0 0 0 0 0 41 72 2 0 0 0 0 115
1989 0 0 0 0 0 10 67 11 0 0 0 0 88
1990 0 0 0 0 11 32 91 35 0 0 0 0 169
1991 0 0 0 0 0 100 13 0 0 0 0 0 113
1992 0 0 0 0 0 17 21 4 0 0 0 0 42
1993 0 0 0 0 0 18 70 3 0 0 0 0 91
1994 0 0 0 0 0 19 55 55 0 0 0 0 129
1995 0 0 0 0 5 24 41 0 4 0 0 0 74
1996 0 0 0 0 0 11 29 0 0 0 0 0 40
1997 0 0 0 0 0 56 46 15 0 0 0 0 117
1998 0 0 0 0 0 18 37 1 0 0 0 0 56
1999 0 0 0 0 0 27 45 11 0 0 0 0 83
2000 0 0 0 0 0 16 5 0 0 0 0 0 21
2001 0 0 0 0 0 15 14 0 0 0 0 0 29

2001 Fairbanks, Alaska (FAI)

SNOWFALL (inches) 2001 FAIRBANKS, AK (FAI)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0.0 0.0 7.8 6.9 12.2 26.9 14.2 1.8 8.7 1.0 T 0.0 79.5
1973–74 0.0 0.0 1.2 8.2 17.5 2.5 3.0 8.7 7.0 1.3 0.0 T 49.4
1974–75 0.0 0.0 0.3 24.4 22.5 17.9 14.1 1.6 5.0 4.4 T 0.0 90.2
1975–76 0.0 0.0 T 14.4 11.4 6.7 6.4 0.5 10.4 1.2 T 0.0 51.0
1976–77 0.0 0.0 T 14.7 4.3 2.6 6.7 19.0 5.5 6.8 T 0.0 59.6
1977–78 0.0 0.0 1.0 17.3 5.1 14.4 4.9 3.0 1.6 0.7 0.1 0.0 48.1
1978–79 0.0 0.0 0.3 7.6 15.1 21.7 9.7 0.5 7.7 3.1 0.0 0.0 65.7
1979–80 0.0 0.0 T 6.5 4.4 11.0 10.8 4.4 3.2 0.8 0.0 0.0 41.1
1980–81 0.0 0.0 3.4 5.1 10.6 4.8 6.2 10.2 0.9 1.9 0.0 0.0 43.1
1981–82 0.0 0.0 0.3 7.8 16.2 10.6 7.6 7.0 7.2 11.4 0.3 0.0 68.4
1982–83 0.0 0.0 0.6 25.9 27.8 3.8 4.8 3.6 2.1 1.9 0.4 0.0 70.9
1983–84 0.0 0.0 0.4 17.3 2.4 14.4 13.8 11.1 0.8 6.7 T 0.0 66.9
1984–85 0.0 0.0 0.0 11.3 8.5 50.7 8.1 8.0 7.4 5.9 1.0 0.0 100.9
1985–86 0.0 0.0 2.1 5.4 14.7 1.8 2.3 2.6 3.7 1.0 0.0 0.0 33.6
1986–87 0.0 0.0 T 11.8 7.4 6.0 12.0 1.5 T 1.0 T 0.0 39.7
1987–88 0.0 0.0 T 3.5 14.1 10.4 6.3 2.5 2.6 0.2 0.3 0.0 39.9
1988–89 0.0 0.0 0.2 12.9 15.2 10.5 10.8 13.4 3.9 0.4 0.8 0.0 68.1
1989–90 0.0 0.0 0.5 19.7 18.1 11.1 10.4 16.0 2.6 T 0.0 T 78.4
1990–91 T 0.0 1.6 6.9 37.3 47.5 20.6 3.0 30.4 T 0.0 0.0 147.3
1991–92 0.0 0.0 0.0 12.2 9.7 18.9 15.5 15.0 1.8 11.5 14.1 0.0 98.7
1992–93 0.0 0.0 24.4 16.7 18.7 28.5 40.2 5.4 5.2 T 0.0 T 139.1
1993–94 0.0 0.0 7.5 7.3 16.3 8.5 11.2 8.1 4.5 0.8 0.0 0.0 64.2
1994–95 0.0 0.0 0.0 15.3 35.3 13.1 5.9 7.4 3.1 1.3 0.0 0.0 81.4
1995–96 0.0 0.1 0.0 7.1 3.2 0.8 5.4 29.3 9.6 0.7 0.0 0.0 56.2
1996–97 0.0 T 7.1 16.2 18.4 9.4 4.9 8.8 2.3 0.4 0.0 T 67.5
1997–98 0.0 0.0 0.0 19.3 7.6 13.1 1.3 3.2 0.9 0.5 0.1 0.0 46.0
1998–99 0.0 0.0 T 6.2 4.6 8.5 4.2 2.7 3.5 0.9 0.4 0.0 31.0
1999–00 0.0 0.0 3.0 11.1 11.2 13.8 27.9 0.2 3.0 T T 0.0 70.2
2000–01 0.0 0.0 1.4 9.8 7.5 2.7 6.7 10.7 8.6 2.2 7.0 0.0 56.6
2001– 0.0 0.0 0.3 6.4 2.8 4.6
POR=49 YRS T 0.0 1.5 10.9 13.2 13.0 10.3 8.6 6.2 3.1 1.3 T 68.1



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