2001 FLAGSTAFF, ARIZONA (FLG)



Flagstaff, elevation 7,000 feet, is situated on a volcanic plateau at the base of the highest mountains in Arizona. The climate may be classified as vigorous with cold winters, mild, pleasantly cool summers, moderate humidity, and considerable diurnal temperature change. Only limited farming exists due to the short growing season. The stormy months are January, February, March, July, and August.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is September 21 and the average last occurrence in the spring is June 13.

Temperatures in Flagstaff are characteristic of high altitude climates. The average daily range of temperature is relatively high, especially in the winter months, October to March, as a result of extensive snow cover and clear skies. Winter minimum temperatures frequently reach zero or below and temperatures of −25 degrees or less have occurred. Summer maximum temperatures are often above 80 degrees and occasionally, temperatures have exceeded 95 degrees.

The Flagstaff area is semi–arid. Several months have recorded little or no precipitation. Over 90 consecutive days without measurable precipitation have occurred. Annual precipitation ranges from less than 10 inches to more than 35 inches. Winter snowfalls can be heavy, exceeding 100 inches during one month and over 200 inches during the winter season. However, accumulations are quite variable from year to year. Some winter months may experience little or no snow and the winter season has produced total snow accumulations of less than 12 inches.

NORMALS, MEANS, AND EXTREMES

FLAGSTAFF, AZ (FLG)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 03103

35 08′ 25″ N  111 40′ 20″ W  GRND: 7000  BARO: 7003  MOUNTAIN (UTC + 7)

2001 Flagstaff, Arizona (FLG)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 42.2 45.3 49.2 57.8 67.4 78.2 81.9 79.3 73.2 63.4 51.1 43.3 61.0
MEAN DAILY MAXIMUM 51 42.4 45.0 49.7 57.9 67.4 77.9 81.7 79.0 74.0 63.5 50.9 43.5 61.1
HIGHEST DAILY MAXIMUM 52 66 71 73 80 87 96 97 92 90 85 74 68 97
YEAR OF OCCURRENCE 1971 1986 1988 1992 1974 1970 1973 1978 1950 1980 1977 1950 JUL 1973
MEAN OF EXTREME MAXS. 52 57.3 59.5 63.9 71.7 78.4 88.6 90.0 87.5 83.3 76.0 65.2 58.4 73.3
NORMAL DAILY MINIMUM 30 15.2 17.7 21.3 26.7 33.3 41.4 50.5 48.9 41.2 31.0 22.4 15.8 30.4
MEAN DAILY MINIMUM 51 15.8 17.9 21.7 27.0 33.2 41.1 50.2 49.1 41.3 30.8 21.4 16.3 30.5
LOWEST DAILY MINIMUM 52 -22 -23 -16 –2 0 22 32 24 23 –2 -13 -23 -23
YEAR OF OCCURRENCE 1971 1985 1966 1975 1996 1955 1955 1968 1971 1971 1958 1990 DEC 1990
MEAN OF EXTREME MINS. 52 –5.0 –.9 4.7 13.9 21.2 29.1 40.8 40.4 29.4 18.4 5.3 –2.9 16.2
NORMAL DRY BULB 30 28.7 31.5 35.3 42.3 50.4 59.8 66.3 64.1 57.3 47.2 36.8 29.6 45.8
MEAN DRY BULB 52 29.2 31.6 35.8 42.6 50.5 59.6 66.0 64.0 57.5 47.3 36.5 30.0 45.9
MEAN WET BULB 48 24.2 26.7 29.4 33.8 39.5 45.1 53.6 53.4 47.5 38.1 30.0 24.6 37.2
MEAN DEW POINT 48 15.7 17.7 19.1 20.9 24.6 28.5 44.0 46.1 38.7 27.4 20.3 15.4 26.5
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.0 0.0 1.7 1.8 0.4 0.0 0.0 0.0 0.0 3.9
MAXIMUM 32 30 4.5 2.6 1.6 0.2 0.0 0.0 0.0 0.0 0.0 0.2 1.1 5.2 15.4
MINIMUM 32 30 30.4 27.5 29.9 25.2 13.9 2.9 0.0 0.1 2.8 18.7 28.0 30.3 209.7
MINIMUM 0 30 3.2 1.2 0.7 0.1 0.0 0.0 0.0 0.0 0.0 * 0.4 2.4 8.0
H/C NORMAL HEATING DEG. DAYS 30 1125 938 921 681 453 187 29 65 237 552 846 1097 7131
NORMAL COOLING DEG. DAYS 30 0 0 0 0 0 31 70 38 6 0 0 0 145
RH NORMAL (PERCENT) 30 62 60 55 46 39 34 51 58 55 53 57 61 53
HOUR 05 LST 30 72 73 71 65 62 53 68 77 74 70 70 71 69
HOUR 11 LST 30 52 49 45 35 29 23 35 40 39 38 44 50 40
HOUR 17 LST 30 50 45 41 32 26 21 39 43 37 36 44 50 39
HOUR 23 LST 30 69 68 63 55 47 40 60 68 66 63 65 68 61
S PERCENT POSSIBLE SUNSHINE 15 77 73 76 82 88 86 75 76 81 79 75 73 78
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 37 2.5 2.1 2.0 1.6 0.3 0.0 0.3 0.3 0.5 1.2 1.3 2.0 14.1
THUNDERSTORMS 37 0.0 0.4 0.7 1.4 2.3 3.3 15.0 15.2 6.6 2.0 0.6 0.2 47.7
CLOUDINESS MEAN:
SUNRISE–SUNSET (OKTAS) 2 5.6 4.4 4.8 1.6 2.4 3.2 4.8 4.4
MIDNIGHT–MIDNIGHT (OKTAS) 1 5.6 5.6 0.8 2.4 3.2 4.8 0.0 3.2 4.0
MEAN NO. DAYS WITH:
CLEAR 1 10.0 6.0 9.0 1.0 3.0 2.0 6.0 14.0 6.0
PARTLY CLOUDY 1 5.0 8.0 5.0 2.0 3.0 7.0 3.0 5.0
CLOUDY 1 4.0 8.0 8.0 5.0 6.0 3.0 7.0
PR MEAN STATION PRESSURE(IN) 11 23.23 23.22 23.16 23.18 23.23 23.29 23.38 23.38 23.33 23.31 23.25 23.26 23.27
MEAN SEA–LEVEL PRES. (IN) 48 30.13 30.08 29.98 29.94 29.92 29.91 30.00 30.01 30.00 30.06 30.10 30.12 30.02
WINDS MEAN SPEED (MPH) 22 5.9 6.1 6.4 7.0 7.1 6.6 5.2 4.3 4.8 5.2 5.8 5.8 5.9
PREVAIL. DIR (TENS OF DEGS) 6 21 21 22 21 21 21 21 21 21 21 21 21 21
MAXIMUM 2–MINUTE:
SPEED (MPH) 7 36 33 38 38 36 34 32 30 31 38 37 34 38
DIR. (TENS OF DEGS) 22 07 19 21 20 20 07 09 21 04 06 19 04
YEAR OF OCCURRENCE 1996 1999 1995 2001 2001 1995 2000 1998 2000 1999 2000 1996 OCT 1999
MAXIMUM 5–SECOND:
SPEED (MPH) 7 45 45 49 48 44 44 40 37 44 53 52 46 53
DIR. (TENS OF DEGS) 24 18 19 21 23 21 07 33 20 04 26 19 04
YEAR OF OCCURRENCE 1996 1998 1995 2001 2001 1995 2000 1998 2000 1999 2001 1998 OCT 1999
PRECIPITATION NORMAL (IN) 30 2.04 2.09 2.55 1.48 0.72 0.40 2.78 2.75 2.03 1.61 1.95 2.40 22.80
MAXIMUM MONTHLY (IN) 52 9.55 10.05 6.75 5.62 4.14 2.92 6.62 8.06 6.75 9.86 6.64 7.30 10.05
YEAR OF OCCURRENCE 1993 1993 1970 1965 1992 1955 1986 1986 1983 1972 1985 1967 FEB 1993
MINIMUM MONTHLY (IN) 52 0.00 T T T T 0.00 T 0.26 0.00 T 0.00 T 0.00
YEAR OF OCCURRENCE 1972 1967 1972 1991 1974 1971 1993 1962 1995 1952 1999 1958 NOV 1999
MAXIMUM IN 24 HOURS (IN) 52 2.71 4.48 2.96 1.79 1.11 2.79 2.55 3.04 3.43 2.73 3.69 3.11 4.48
YEAR OF OCCURRENCE 1993 1993 1970 1985 1965 1956 1964 1986 1965 1972 1978 1951 FEB 1993
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 7.7 7.1 9.2 6.0 4.8 2.8 11.9 11.6 7.4 5.0 5.5 7.4 86.4
PRECIPITATION 1.00 30 0.3 0.3 0.3 0.2 * 0.0 0.5 0.5 0.5 0.4 0.4 0.6 4.0
SNOWFALL NORMAL (IN) 30 20.5 19.0 24.4 11.9 1.9 0.0 0.0 0.0 0.1 2.5 10.7 17.8 108.8
MAXIMUM MONTHLY (IN) 46 63.4 45.5 79.4 58.3 8.2 T T 0.3 2.0 24.7 40.7 86.0 86.0
YEAR OF OCCURRENCE 1980 1990 1991 1965 1975 1993 1992 1992 1965 1971 1985 1967 DEC 1967
MAXIMUM IN 24 HOURS (IN) 46 23.1 23.1 26.3 17.2 6.6 T T 0.3 2.0 13.5 19.6 27.3 27.3
YEAR OF OCCURRENCE 1980 1987 1970 1977 1965 1993 1992 1992 1965 1974 1991 1967 DEC 1967
MAXIMUM SNOW DEPTH (IN) 45 34 40 37 31 8 0 0 0 T 11 23 66 66
YEAR OF OCCURRENCE 1979 1979 1969 1973 1954 1965 1974 1975 1967 DEC 1967
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 4.1 4.2 5.4 2.6 0.6 0.0 0.0 0.0 0.* 0.6 2.2 4.1 23.8

2001 Flagstaff, Arizona (FLG)

PRECIPITATION (inches) 2001 FLAGSTAFF, AZ (FLG)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.00 0.02 T 0.72 0.14 1.93 1.90 2.82 0.81 9.86 2.34 4.13 24.67
1973 1.89 3.69 6.18 1.21 1.17 0.40 1.87 1.25 T 0.03 1.90 0.12 19.71
1974 3.63 0.26 1.01 0.57 T T 3.00 2.16 0.93 3.64 1.03 1.18 17.41
1975 1.76 1.90 2.92 2.20 1.16 0.05 2.24 0.74 1.89 0.33 2.96 1.95 20.10
1976 0.17 5.96 2.06 3.09 1.65 T 3.82 0.58 1.16 0.73 0.10 0.80 20.12
1977 1.85 0.84 0.92 1.47 0.96 0.91 3.60 3.72 1.52 1.04 0.76 1.18 18.77
1978 4.09 4.67 5.58 1.60 0.27 0.09 1.17 0.68 0.46 0.56 6.16 5.39 30.72
1979 5.54 1.73 2.52 0.31 2.16 0.18 0.79 2.38 0.13 1.30 1.14 1.50 19.68
1980 6.52 7.81 4.16 1.21 1.79 0.25 2.49 2.19 0.65 1.08 T 1.15 29.30
1981 1.31 1.16 4.04 1.50 0.72 1.09 2.87 3.73 2.54 1.81 2.43 0.17 23.37
1982 4.62 2.55 5.69 0.25 0.86 T 1.89 2.32 3.17 0.71 5.36 3.67 31.09
1983 1.61 3.04 4.36 2.18 0.06 0.28 2.86 3.53 6.75 0.75 1.53 2.52 29.47
1984 0.36 0.13 0.89 0.73 0.21 0.13 4.20 3.86 1.75 1.43 1.40 5.00 20.09
1985 2.38 1.67 2.54 3.39 0.26 0.09 2.36 1.07 3.68 2.44 6.64 0.15 26.67
1986 0.31 1.76 2.60 1.23 0.72 1.16 6.62 8.06 4.80 2.02 1.68 1.43 32.39
1987 2.51 2.54 1.69 0.21 0.70 0.25 1.93 3.74 1.49 4.64 2.91 1.37 23.98
1988 1.64 2.30 0.14 3.83 0.14 1.86 3.48 4.77 0.15 1.23 1.14 1.00 21.68
1989 1.84 1.35 2.08 0.01 0.62 0.23 2.28 3.40 0.30 1.28 T 1.05 14.44
1990 1.54 3.20 2.17 2.32 0.73 0.24 4.32 1.71 6.18 0.49 1.09 1.68 25.67
1991 1.76 2.08 6.00 T 0.14 0.59 1.04 1.64 0.26 1.12 4.47 2.73 21.83
1992 2.03 3.69 4.40 0.78 4.14 0.32 2.67 5.80 T 3.64 0.46 6.78 34.71
1993 9.55 10.05 1.54 0.26 0.44 0.55 T 4.19 1.95 3.29 3.02 0.76 35.60
1994 0.38 2.47 3.03 2.48 1.01 1.70 3.61 2.75 1.12 1.91 1.43
1995 2.39 3.77 3.99 1.49 0.44 0.06 0.61 2.30 0.00 0.01 0.31 0.35 15.72
1996 0.19 1.36 0.54 0.07 T T 1.79 0.92 3.73 0.93 0.64
1997 3.21 0.99 0.03 0.60 0.08 0.18 0.21 2.83 3.68 1.15 0.80 1.85 15.61
1998 1.30 2.15 3.74 1.52 1.31 0.00 4.72 2.82 4.45 3.11 1.76 0.42 27.30
1999 0.28 0.48 0.53 2.80 0.42 0.95 3.27 2.45 4.54 T 0.00 T 15.72
2000 0.62 1.61 3.12 0.19 0.12 1.11 0.29 2.83 0.36 3.85 1.07 0.21 15.38
2001 2.60 1.68 1.28 1.40 0.82 0.03 2.80 3.46 0.68 1.21 0.43 1.16 17.55
POR=102 YRS 2.00 2.05 2.12 1.32 0.71 0.50 2.68 2.88 1.86 1.56 1.47 1.97 21.02

2001 Flagstaff, Arizona (FLG)

AVERAGE TEMPERATURE (F) 2001 FLAGSTAFF, AZ (FLG)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 28.4 31.8 40.0 39.8 46.4 57.6 66.5 62.9 56.7 45.9 29.6 21.9 44.0
1973 22.9 28.7 26.8 38.0 52.8 60.5 65.7 64.6 57.7 50.0 37.1 33.0 44.8
1974 27.8 30.5 40.4 43.2 54.8 66.5 66.3 64.7 58.7 47.9 36.8 26.8 47.0
1975 27.7 27.6 33.2 36.2 47.5 57.1 65.9 63.5 57.9 46.5 37.3 29.2 44.1
1976 30.6 35.1 35.4 41.4 52.8 58.9 66.5 62.8 57.1 47.0 39.5 31.6 46.6
1977 26.8 34.2 33.5 44.7 47.4 62.2 67.2 66.2 60.2 50.8 41.0 37.6 47.7
1978 31.5 30.7 40.3 42.2 49.4 61.4 66.6 63.7 57.3 49.8 34.6 24.3 46.0
1979 22.6 25.9 32.3 40.7 47.9 57.8 64.1 60.5 58.8 47.8 31.2 31.2 43.4
1980 30.7 32.8 32.3 41.9 45.6 60.9 69.0 66.3 59.7 49.0 41.4 39.9 47.5
1981 36.2 36.3 36.6 48.5 52.1 66.1 68.2 65.4 58.7 46.7 41.8 36.4 49.4
1982 28.3 30.5 35.3 43.5 49.9 57.1 63.8 65.6 57.6 44.0 35.2 28.1 44.9
1983 31.0 32.3 36.2 37.0 49.9 57.3 65.5 63.8 60.7 48.6 36.9 34.0 46.1
1984 31.7 32.8 38.3 40.7 56.8 58.5 65.7 63.8 59.3 42.4 35.3 29.0 46.2
1985 27.5 28.9 35.5 46.2 51.5 62.6 67.2 65.3 53.1 47.7 33.8 32.4 46.0
1986 37.0 34.2 39.7 44.1 52.0 61.2 64.0 65.7 53.0 43.5 37.6 30.2 46.9
1987 27.6 31.1 32.8 45.9 50.7 61.3 62.8 62.8 56.5 50.4 36.2 27.1 45.4
1988 29.1 34.2 37.4 44.0 50.8 61.5 67.4 64.3 55.9 52.5 36.9 27.9 46.8
1989 26.2 32.3 41.8 50.4 54.2 60.8 68.1 63.6 58.7 47.5 38.4 31.6 47.8
1990 28.6 29.3 38.3 46.1 50.3 64.4 66.9 62.6 59.8 48.9 37.6 25.1 46.5
1991 30.5 37.2 32.2 43.1 49.4 57.3 67.1 66.5 59.6 50.8 36.9 30.2 46.7
1992 27.3 35.2 38.1 49.1 53.3 59.0 65.1 64.2 59.3 50.4 33.8 26.3 46.8
1993 32.2 32.5 40.2 46.4 53.9 60.4 65.5 64.8 57.9 47.4 35.0 30.1 47.2
1994 32.8 29.8 40.6 44.3 51.7 65.4 66.4 58.1 44.2 32.2 32.1
1995 28.4 37.2 38.2 40.4 55.1 64.6 66.9 47.7 42.3 31.9
1996 31.4 36.9 37.8 44.9 61.9
1997 28.0 29.6 39.1 40.5 54.1 57.1 63.8 63.8 59.4 45.0 37.7 26.6 45.4
1998 31.4 27.2 33.7 37.2 46.8 55.0 66.2 64.9 57.3 44.6 37.1 31.1 44.4
1999 33.9 35.1 39.0 37.5 49.4 58.0 64.2 62.1 56.1 47.7 40.5 29.3 46.1
2000 32.9 35.6 35.4 46.6 55.4 62.2 66.5 65.0 60.1 46.2 30.8 34.7 47.6
2001 27.2 29.7 39.0 43.5 55.3 62.2 65.6 64.3 59.9 50.2 38.8 27.0 46.9
POR=102 YRS 28.4 31.2 35.8 42.8 50.6 59.4 65.8 63.9 57.4 47.1 36.3 29.8 45.7

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 Flagstaff, Arizona (FLG)

HEATING DEGREE DAYS (base 65 F) 2001 FLAGSTAFF, AZ (FLG)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 22 78 241 584 1055 1330 1297 1006 1176 801 370 164 8124
1973–74 39 45 212 458 829 987 1147 960 754 650 310 67 6458
1974–75 19 34 195 522 841 1178 1150 1041 978 856 536 231 7581
1975–76 23 66 207 566 821 1101 1059 862 912 702 370 190 6879
1976–77 17 71 230 553 757 1027 1177 858 970 603 540 102 6905
1977–78 9 19 157 432 715 843 1032 954 756 677 478 128 6200
1978–79 33 73 227 465 907 1254 1307 1089 1005 722 524 219 7825
1979–80 68 157 186 526 1008 1042 1056 930 1009 684 596 158 7420
1980–81 6 43 153 491 703 774 886 794 873 486 398 50 5657
1981–82 1 39 182 558 689 880 1130 963 911 640 458 230 6681
1982–83 65 22 218 643 888 1136 1046 911 888 835 461 222 7335
1983–84 26 64 134 502 837 952 1025 929 820 722 247 204 6462
1984–85 21 51 165 695 884 1109 1155 1005 911 557 411 102 7066
1985–86 26 31 351 532 931 1005 862 855 777 619 392 119 6500
1986–87 58 28 353 661 816 1069 1150 942 990 566 435 114 7182
1987–88 82 86 246 447 859 1167 1103 885 848 621 434 124 6902
1988-89 9 41 266 381 836 1141 1196 910 710 432 330 139 6391
1989-90 7 67 184 540 792 1030 1124 996 822 558 449 84 6653
1990-91 10 93 167 494 816 1231 1060 772 1008 652 476 225 7004
1991–92 7 12 159 438 835 1071 1159 854 830 470 356 180 6371
1992-93 38 80 163 444 932 1191 1014 903 761 551 339 158 6574
1993–94 29 45 207 538 893 1073 990 979 747 614 406
1994–95 35 11 203 637 974 1014 1128 772 821 731 290
1995–96 60 10 531 671 1015 1035 807 834 597 108
1996–97 2 36 291 620 966 1141 984 797 729 330 231
1997–98 61 45 161 613 813 1182 1037 1050 964 828 559 300 7613
1998-99 15 27 226 624 832 1044 957 829 798 817 480 220 6869
1999–00 45 86 260 529 726 1099 987 846 911 547 293 98 6427
2000–01 26 49 148 577 1020 933 1165 983 801 641 295 109 6747
2001– 25 40 149 452 781 1172

2001 Flagstaff, Arizona (FLG)

COOLING DEGREE DAYS (base 65 F) 2001 FLAGSTAFF, AZ (FLG)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 0 4 76 20 0 0 0 0 100
1973 0 0 0 0 0 34 69 40 0 0 0 0 143
1974 0 0 0 0 0 120 66 33 13 0 0 0 232
1975 0 0 0 0 0 0 60 28 0 0 0 0 88
1976 0 0 0 0 0 15 70 13 0 0 0 0 98
1977 0 0 0 0 0 28 82 61 20 0 0 0 191
1978 0 0 0 0 0 25 87 38 2 0 0 0 152
1979 0 0 0 0 0 10 47 24 4 0 0 0 85
1980 0 0 0 0 0 43 133 91 2 0 0 0 269
1981 0 0 0 0 0 91 108 58 0 0 0 0 257
1982 0 0 0 0 0 1 36 46 6 0 0 0 89
1983 0 0 0 0 0 0 45 31 12 0 0 0 88
1984 0 0 0 0 2 14 49 23 2 0 0 0 90
1985 0 0 0 0 0 36 102 47 0 0 0 0 185
1986 0 0 0 0 0 11 33 55 0 0 0 0 99
1987 0 0 0 0 0 13 21 26 0 0 0 0 60
1988 0 0 0 0 0 28 94 28 1 0 0 0 151
1989 0 0 0 0 0 22 111 29 0 0 0 0 162
1990 0 0 0 0 0 76 76 28 18 0 0 0 198
1991 0 0 0 0 0 0 79 65 4 0 0 0 148
1992 0 0 0 0 0 6 48 62 0 0 0 0 116
1993 0 0 0 0 0 26 50 46 1 0 0 0 123
1994 0 0 0 0 0 53 57 0 0 0 0
1995 0 0 0 0 0 53 76 0 0 0
1996 0 0 0 0 18
1997 0 0 0 0 1 0 29 14 2 0 0 0 46
1998 0 0 0 0 0 5 60 28 0 0 0 0 93
1999 0 0 0 0 0 15 29 5 0 0 0 0 49
2000 0 0 0 0 3 18 81 55 8 0 0 0 165
2001 0 0 0 0 0 30 50 26 0 0 0 0 106

2001 Flagstaff, Arizona (FLG)

SNOWFALL (inches) 2001 FLAGSTAFF, AZ (FLG)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0.0 0.0 0.0 11.8 23.2 28.9 21.0 33.8 77.4 10.9 3.0 0.0 210.0
1973–74 0.0 0.0 0.0 T 20.7 1.2 35.3 2.4 8.8 1.6 0.0 0.0 70.0
1974–75 0.0 0.0 0.0 16.6 8.2 15.6 20.1 18.2 29.1 25.1 8.2 0.0 141.1
1975–76 0.0 0.0 0.0 T 25.2 18.9 1.5 31.2 20.4 31.2 3.2 0.0 131.6
1976–77 0.0 0.0 0.0 T 0.7 9.0 21.1 11.2 8.8 17.8 1.6 0.0 70.2
1977–78 0.0 0.0 0.0 0.0 7.0 1.6 40.4 32.1 24.5 9.3 1.3 0.0 116.2
1978–79 0.0 0.0 0.0 0.0 16.5 19.8 59.4 18.1 22.8 4.1 4.8 0.0 145.5
1979–80 0.0 0.0 0.0 0.5 5.5 20.7 63.4 32.9 42.5 11.6 T 0.0 177.1
1980–81 0.0 0.0 0.0 6.9 T 6.8 11.7 11.9 45.6 9.5 0.0 0.0 92.4
1981–82 0.0 0.0 0.0 0.0 47.5 20.4 26.7 1.9 0.4 0.0
1982–83 0.0 0.0 T T 22.6 27.1 15.3 25.0 38.5 13.6 0.5 0.0 142.6
1983–84 0.0 0.0 0.0 0.0 14.3 5.8 4.3 1.8 0.3 5.5 0.0 0.0 32.0
1984–85 0.0 0.0 0.0 0.6 9.4 28.7 26.2 31.3 21.3 18.5 0.0 0.0 136.0
1985–86 0.0 0.0 0.0 0.0 40.7 2.6 0.4 26.9 32.8 1.6 0.4 0.0 105.4
1986–87 0.0 0.0 0.9 0.6 4.8 9.5 38.6 40.7 25.0 1.5 0.0 0.0 121.6
1987–88 0.0 0.0 0.0 0.0 2.9 16.7 28.9 21.0 1.5 33.1 0.4 0.0 104.5
1988-89 0.0 0.0 0.0 0.0 11.9 15.0 21.7 12.0 16.6 T 0.5 0.0 77.7
1989-90 0.0 T T T T 13.1 24.2 45.5 25.0 4.2 1.4 0.0 113.4
1990-91 T T T T 9.6 22.3 3.1 13.5 79.4 T T 0.0 127.9
1991–92 0.0 0.0 T 5.9 39.5 24.0 24.7 24.9 35.9 4.0 T T 158.9
1992-93 T 0.3 0.0 0.5 2.1 41.7 55.7 35.2 11.9 2.3 0.3 T 150.0
1993–94 0.0 T T 0.0 23.0 13.4 6.9 26.1 12.3 27.8 T
1994–95 0.0 T 0.0 0.0
1995–96 0.0 0.0 0.0 0.0 0.0
1996–97
1997–98
1998–99
1999–00
2000–01
2001–
POR=46 YRS T T 0.1 2.0 9.7 15.6 20.0 18.0 21.5 9.7 1.7 T 98.3



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