2001 BALTIMORE, MARYLAND (BWI)



Baltimore–Washington International Airport lies in a region about midway between the rigorous climates of the North and the mild climates of the South, and adjacent to the modifying influences of the Chesapeake Bay and Atlantic Ocean to the east and the Appalachian Mountains to the west. Since this region is near the average path of the low pressure systems which move across the country, changes in wind direction are frequent and contribute to the changeable character of the weather. The net effect of the mountains to the west and the bay and ocean to the east is to produce a more equable climate compared with other continental locations farther inland at the same latitude.

Rainfall distribution throughout the year is rather uniform, however, the greatest intensities are confined to the summer and early fall months, the season for hurricanes and severe thunderstorms. Moisture deficiencies for crops occur occasionally during the growing season, but severe droughts are rare. Rainfall during the growing season occurs principally in the form of thunderstorms, and rainfall totals during these months vary appreciably.

The average date for the last occurrence in spring of temperatures as low as 32 degrees is mid–April. The average date for the first occurrence in fall of temperatures as low as 32 degrees is late October. The freeze–free period is approximately 194 days.

In summer, the area is under the influence of the large semi–permanent high pressure system commonly known as the Bermuda High and centered over the Atlantic Ocean near 30 degrees N Latitude. This pressure system brings warm humid air to the area. The proximity of large water areas and the inflow of southerly winds contribute to high relative humidities during much of the year.

January is the coldest month, and July, the warmest. Snowfall occurs on about eleven days per year on the average, however, an average of only about six days annually produces snowfalls of 1 inch or greater. Snow is frequently mixed with rain and sleet, and snow seldom remains on the ground more than a few days.

Glaze or freezing rain which is hazardous to highway traffic occurs on an average of two to three times per year, generally in January or February. Some years pass without the occurrence of freezing rain, while in others it occurs on as many as eight to ten days. Sleet is observed on about five days annually with the greatest frequency of occurrence in January.

The annual prevailing wind direction is from the west. Winter and spring months have the highest average wind speed. Destructive velocities are rare and occur mostly during summer thunderstorms. Only rarely have hurricanes in the vicinity caused widespread damage, then primarily through flooding.

NORMALS, MEANS, AND EXTREMES

BALTIMORE, MD (BWI)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 93721

39 10′ 20″ N  76 41′ 02″ W  GRND: 193  BARO: 196  EASTERN (UTC + 5)

2001 Baltimore, Maryland (BWI)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 40.2 43.7 54.0 64.3 74.2 83.2 87.2 85.4 78.5 67.3 56.5 45.2 65.0
MEAN DAILY MAXIMUM 51 41.5 44.8 53.4 65.0 74.4 83.2 87.3 85.3 78.5 67.6 56.2 45.4 65.2
HIGHEST DAILY MAXIMUM 51 75 79 89 94 98 101 104 105 100 92 83 77 105
YEAR OF OCCURRENCE 1975 2000 1998 1960 1991 1994 1988 1983 1983 1954 1974 1998 AUG 1983
MEAN OF EXTREME MAXS. 51 62.3 66.1 76.3 85.0 90.0 95.1 97.0 95.4 92.2 83.2 74.8 65.7 81.9
NORMAL DAILY MINIMUM 30 23.4 25.9 34.1 42.5 52.6 61.8 66.8 65.7 58.4 45.9 37.1 28.2 45.2
MEAN DAILY MINIMUM 51 24.6 26.5 33.8 43.0 52.6 61.7 66.8 65.4 58.1 46.1 36.6 28.4 45.3
LOWEST DAILY MINIMUM 51 -7 -3 6 20 32 40 50 45 35 25 13 0 -7
YEAR OF OCCURRENCE 1984 1979 1960 1965 1966 1972 2001 1986 1963 1969 1955 1983 JAN 1984
MEAN OF EXTREME MINS. 51 6.9 10.7 19.0 28.9 38.6 48.9 55.9 53.6 42.9 31.6 21.5 12.6 30.9
NORMAL DRY BULB 30 31.8 34.8 44.1 53.4 63.4 72.5 77.0 75.6 68.5 56.6 46.8 36.7 55.1
MEAN DRY BULB 51 33.0 35.7 43.6 53.9 63.4 72.4 77.1 75.5 68.4 56.8 46.5 36.9 55.3
MEAN WET BULB 17 30.6 33.0 38.5 47.7 57.1 65.9 70.0 68.5 62.2 51.8 40.2 32.0 49.8
MEAN DEW POINT 17 23.3 25.2 30.0 40.1 51.3 61.3 65.9 64.7 58.3 46.9 34.3 25.4 43.9
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.4 1.4 5.8 11.3 8.0 3.4 0.0 0.0 0.0 30.3
MAXIMUM 32 30 7.2 4.2 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.6 15.5
MINIMUM 32 30 25.3 21.1 14.0 3.4 * 0.0 0.0 0.0 0.0 1.9 10.2 21.1 97.0
MINIMUM 0 30 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 * 0.6
H/C NORMAL HEATING DEG. DAYS 30 1029 846 648 348 108 0 0 0 29 276 546 877 4707
NORMAL COOLING DEG. DAYS 30 0 0 0 0 59 227 372 329 134 16 0 0 1137
RH NORMAL (PERCENT) 30 63 61 59 59 66 68 69 71 71 70 66 66 66
HOUR 01 LST 30 67 66 65 67 76 81 81 82 82 79 73 70 74
HOUR 07 LST 30 70 70 70 71 77 79 81 83 84 82 77 73 76
HOUR 13 LST 30 56 54 50 48 53 52 53 55 55 53 55 57 53
HOUR 19 LST 30 61 58 54 52 60 62 63 66 68 67 63 63 61
S PERCENT POSSIBLE SUNSHINE 40 51 55 56 56 56 62 64 62 60 58 51 49 57
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 52 3.1 3.2 2.5 1.8 1.6 0.9 0.8 1.0 1.3 2.5 2.6 3.1 24.4
THUNDERSTORMS 52 0.3 0.2 0.8 2.4 4.0 5.4 5.9 4.9 2.0 1.0 0.4 0.1 27.4
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 46 5.1 5.0 5.0 5.0 5.0 4.6 4.4 4.4 4.2 4.1 4.8 5.0 4.7
MIDNIGHT-MIDNIGHT (OKTAS) 32 4.9 4.7 4.8 4.6 4.7 4.4 4.3 4.2 4.2 3.9 4.5 4.8 4.5
MEAN NO. DAYS WITH:
CLEAR 47 8.0 7.7 7.9 7.7 7.7 8.4 8.9 9.2 10.3 11.6 8.1 8.1 103.6
PARTLY CLOUDY 47 7.5 6.8 8.7 9.0 10.3 11.4 11.5 10.5 8.3 7.9 8.0 6.9 106.8
CLOUDY 47 15.5 13.8 14.4 13.4 13.0 10.2 9.9 10.6 10.7 10.9 13.2 15.3 150.9
PR MEAN STATION PRESSURE(IN) 28 29.90 29.91 29.89 29.80 29.80 29.80 29.80 29.90 29.90 29.90 29.91 29.91 29.87
MEAN SEA-LEVEL PRES. (IN) 17 30.10 30.09 30.04 29.98 29.99 29.97 30.00 30.03 30.06 30.11 30.11 30.13 30.05
WINDS MEAN SPEED (MPH) 51 9.5 9.9 10.6 10.2 8.9 8.3 7.7 7.6 7.9 8.2 9.0 9.0 8.9
PREVAIL. DIR (TENS OF DEGS) 16 29 29 30 29 28 25 25 25 27 27 28 29 28
MAXIMUM 2-MINUTE:
SPEED (MPH) 5 40 40 41 36 39 38 38 34 34 31 36 41 41
DIR. (TENS OF DEGS) 30 29 28 32 29 28 27 28 26 29 27 28 28
YEAR OF OCCURRENCE 2000 2001 1997 2001 1997 1997 1997 1997 1999 2001 2000 2000 DEC 2000
MAXIMUM 5-SECOND:
SPEED (MPH) 5 53 48 53 52 49 46 44 53 44 40 44 54 54
DIR. (TENS OF DEGS) 28 29 28 23 32 31 26 27 27 27 27 28 28
YEAR OF OCCURRENCE 1999 2001 1997 1998 1997 2000 1997 1997 1999 2001 2000 2000 DEC 2000
PRECIPITATION NORMAL (IN) 30 3.05 3.12 3.38 3.09 3.72 3.67 3.69 3.92 3.41 2.98 3.32 3.41 40.76
MAXIMUM MONTHLY (IN) 51 7.84 7.16 8.64 8.15 8.71 9.95 8.18 18.35 11.50 8.09 7.68 7.44 18.35
YEAR OF OCCURRENCE 1979 1979 1994 1952 1989 1972 1960 1955 1999 1976 1952 1969 AUG 1955
MINIMUM MONTHLY (IN) 51 0.29 0.56 0.93 0.39 0.37 0.15 0.30 0.77 0.21 T 0.31 0.20 T
YEAR OF OCCURRENCE 1955 1978 1966 1985 1986 1954 1955 1951 1967 1963 1981 1955 OCT 1963
MAXIMUM IN 24 HOURS (IN) 51 3.11 3.26 3.18 2.80 3.64 5.23 5.86 8.35 6.04 3.49 3.43 3.39 8.35
YEAR OF OCCURRENCE 1976 1983 1958 1952 1960 1972 1952 1955 1985 1955 1952 1977 AUG 1955
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 10.2 9.4 10.0 10.5 10.9 9.2 9.6 9.4 7.2 7.4 9.0 9.2 112.0
PRECIPITATION 1.00 30 0.5 0.7 0.7 0.7 0.7 1.1 1.1 1.1 1.0 0.9 0.9 0.9 10.3
SNOWFALL NORMAL (IN) 30 6.6 7.5 3.0 0.* T 0.0 0.0 0.0 0.0 0.* 1.1 3.6 21.8
MAXIMUM MONTHLY (IN) 51 32.6 33.1 21.6 0.7 T 0.0 T 0.0 0.0 0.3 8.4 20.4 33.1
YEAR OF OCCURRENCE 1996 1979 1960 1985 1963 1992 1979 1967 1966 FEB 1979
MAXIMUM IN 24 HOURS (IN) 51 16.8 22.8 13.0 0.7 T 0.0 T 0.0 0.0 0.3 8.4 14.1 22.8
YEAR OF OCCURRENCE 1996 1983 1962 1985 1963 1992 1979 1967 1960 FEB 1983
MAXIMUM SNOW DEPTH (IN) 50 30 23 70 0 0 0 0 0 0 0 6 12 70
YEAR OF OCCURRENCE 1957 1983 1960 1987 1960 MAR 1960
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 1.8 1.8 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.9 5.6

2001 Baltimore, Maryland (BWI)

PRECIPITATION (inches) 2001 BALTIMORE, MD (BWI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 2.82 6.01 2.38 5.30 4.11 9.95 2.81 2.22 1.15 3.51 7.05 5.02 52.33
1973 2.81 2.82 3.96 6.41 3.73 3.16 4.22 3.35 4.87 2.86 1.28 6.36 45.83
1974 2.92 0.94 4.12 2.59 3.58 2.84 0.85 5.85 5.45 1.53 1.39 5.70 37.76
1975 3.47 2.47 5.17 2.73 4.63 3.82 7.15 4.23 8.62 2.89 2.03 4.61 51.82
1976 4.10 2.16 2.23 1.27 5.03 2.49 5.56 2.98 6.93 8.09 0.56 2.04 43.44
1977 1.36 0.63 3.93 3.05 1.49 3.44 2.62 3.31 0.62 5.17 5.01 5.76 36.39
1978 7.34 0.56 4.74 1.26 5.49 2.81 6.83 3.39 1.03 0.71 2.70 4.63 41.49
1979 7.84 7.16 2.05 3.37 4.15 5.74 3.71 9.38 6.73 5.53 2.45 0.87 58.98
1980 2.58 1.06 5.46 4.24 3.58 3.04 3.25 4.00 1.00 3.08 2.72 0.70 34.71
1981 0.49 2.93 1.14 2.04 3.63 5.40 4.59 1.93 2.89 2.57 0.31 3.30 31.22
1982 3.37 4.04 3.03 3.61 1.85 5.70 2.16 0.95 3.63 2.31 3.13 2.39 36.17
1983 2.21 4.81 6.80 6.55 5.47 5.23 1.31 1.57 1.76 3.58 5.02 6.72 51.03
1984 1.96 3.90 5.79 2.95 4.29 1.65 3.27 4.11 2.38 1.94 3.01 1.71 36.96
1985 2.03 3.03 2.37 0.39 6.01 2.44 2.53 3.72 6.22 2.48 4.71 0.84 36.77
1986 2.16 3.78 0.96 2.64 0.37 1.46 4.12 4.26 0.58 1.86 5.96 5.52 33.67
1987 5.85 2.22 0.99 1.86 4.16 2.63 5.05 1.61 7.34 2.25 5.05 2.07 41.08
1988 3.24 3.25 2.35 2.44 4.37 0.84 3.78 2.64 2.05 1.59 4.78 0.97 32.30
1989 3.07 3.36 4.24 3.16 8.71 5.98 7.35 3.38 3.64 4.90 1.97 2.12 51.88
1990 3.71 1.48 2.54 4.23 4.92 2.55 5.68 6.17 1.07 2.57 2.10 4.86 41.88
1991 3.54 0.73 5.65 1.68 1.16 1.08 1.76 2.54 3.05 3.20 1.69 4.08 30.16
1992 1.27 2.49 4.58 1.76 2.92 1.89 5.07 2.19 5.96 2.73 3.44 4.63 38.93
1993 2.73 2.84 8.12 3.68 3.66 2.56 1.71 2.55 4.09 3.02 3.09 4.45 42.50
1994 4.59 4.07 8.64 2.53 3.02 2.84 4.54 3.44 3.93 1.82 1.95 1.95 43.32
1995 2.87 1.88 2.12 1.92 3.40 1.80 3.65 2.98 3.29 6.24 4.12 2.66 36.93
1996 6.80 2.36 3.57 3.76 5.68 4.08 7.38 4.17 5.65 4.32 3.77 6.77 58.31
1997 2.83 2.23 5.67 2.40 3.03 3.74 1.49 4.21 1.47 3.43 5.79 2.05 38.34
1998 5.65 6.40 5.56 3.02 3.46 3.22 1.42 0.91 1.27 1.06 1.13 1.27 34.37
1999 4.70 2.65 3.46 2.27 1.73 2.04 2.06 6.14 11.50 2.48 1.95 2.96 43.94
2000 3.64 2.01 4.35 5.06 2.82 5.54 5.64 3.18 5.55 0.08 1.73 2.31 41.91
2001 2.68 2.35 4.76 1.32 5.34 3.58 3.85 5.74 1.43 0.78 1.01 1.73 34.57
POR=51 YRS 3.13 2.98 3.90 3.14 3.60 3.52 3.79 4.00 3.54 2.89 3.04 3.25 40.78

2001 Baltimore, Maryland (BWI)

AVERAGE TEMPERATURE (F) 2001 BALTIMORE, MD (BWI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 37.6 34.3 43.6 51.6 62.7 68.1 76.9 75.4 69.8 53.5 43.2 40.4 54.8
1973 34.6 34.3 48.3 53.1 59.6 73.5 75.9 76.9 69.8 58.2 47.3 37.3 55.7
1974 37.9 33.8 45.2 55.3 61.9 68.5 76.5 75.0 67.5 55.3 48.2 40.3 55.5
1975 38.5 39.1 42.1 50.4 66.3 73.0 76.1 77.9 66.0 60.7 51.9 37.2 56.6
1976 30.8 44.1 48.1 56.9 62.1 74.8 75.0 73.9 67.5 52.9 40.9 32.6 55.0
1977 22.9 36.5 50.0 57.9 66.7 71.4 79.0 77.7 72.1 56.0 49.2 35.6 56.3
1978 29.2 27.3 41.7 54.2 62.4 73.1 75.9 78.1 69.7 56.1 48.7 40.2 54.7
1979 33.1 25.6 48.5 53.1 64.7 70.7 75.9 75.7 68.8 55.7 50.6 40.3 55.2
1980 33.8 31.5 41.5 55.7 65.5 71.3 78.2 78.7 72.2 55.3 44.2 35.5 55.3
1981 27.9 38.8 41.9 57.0 62.2 74.3 77.3 74.4 67.7 53.2 46.2 34.5 54.6
1982 25.5 35.8 42.9 50.7 66.1 69.4 77.1 73.0 67.3 56.3 48.4 42.0 54.5
1983 34.6 34.7 45.4 51.8 61.5 72.1 78.7 78.0 69.5 57.3 47.1 33.2 55.3
1984 28.5 41.7 38.2 51.5 61.3 73.4 73.9 75.0 64.8 62.2 43.9 44.1 54.9
1985 29.3 38.7 46.0 57.9 65.1 70.4 76.4 74.5 69.4 58.8 52.4 33.8 56.1
1986 33.2 32.9 45.0 53.5 66.7 74.4 79.4 73.1 68.9 58.9 44.8 38.2 55.8
1987 32.5 34.3 46.2 53.1 65.0 74.5 80.0 76.1 69.3 51.5 47.8 39.8 55.8
1988 28.7 35.9 45.1 52.0 64.0 73.0 80.3 78.5 66.8 51.3 48.1 36.3 55.0
1989 37.9 36.5 43.8 52.5 62.0 73.9 76.0 74.4 69.0 58.3 44.8 25.4 54.5
1990 42.0 42.3 47.6 54.8 62.3 73.3 78.4 74.6 67.3 60.7 49.6 42.2 57.9
1991 35.5 40.7 46.7 55.9 70.6 74.6 79.5 77.8 69.0 57.8 45.8 38.7 57.7
1992 34.6 37.1 41.3 52.0 60.8 70.1 77.4 72.3 67.7 54.3 47.2 38.9 54.5
1993 37.9 31.4 39.4 52.5 65.0 72.2 80.2 76.7 68.8 55.5 46.5 36.2 55.2
1994 27.1 34.0 43.0 59.6 60.6 77.2 80.1 74.1 68.1 56.8 51.9 42.6 56.3
1995 39.0 33.2 47.8 55.2 64.5 74.5 81.5 80.1 70.4 61.1 42.6 33.9 57.0
1996 31.7 35.7 39.9 54.0 60.6 73.3 74.3 73.2 67.8 55.6 40.2 39.6 53.8
1997 32.8 41.0 45.5 51.6 59.5 70.1 77.3 74.0 67.3 56.5 43.7 38.4 54.8
1998 40.9 41.7 45.9 55.2 66.5 71.7 76.6 75.7 71.8 56.3 46.1 41.1 57.5
1999 35.1 37.6 41.8 53.2 64.2 71.5 80.0 75.7 68.2 53.9 49.9 39.1 55.9
2000 32.5 38.1 48.5 52.9 64.7 72.8 72.7 73.4 65.3 57.1 44.2 30.0 54.4
2001 33.1 38.5 41.8 55.4 63.4 74.1 72.8 77.0 65.2 56.0 50.7 42.1 55.8
POR=51 YRS 32.9 35.7 43.6 53.8 63.4 72.4 77.0 75.4 68.5 56.7 46.4 36.9 55.2

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 Baltimore, Maryland (BWI)

HEATING DEGREE DAYS (base 65 F) 2001 BALTIMORE, MD (BWI)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 2 0 16 357 649 759 935 854 511 365 191 1 4640
1973-74 0 0 24 221 524 852 830 868 613 309 148 14 4403
1974-75 0 0 49 303 509 759 818 720 702 436 66 2 4364
1975-76 0 0 50 156 397 853 1050 603 518 293 133 11 4064
1976-77 0 0 34 377 716 1001 1296 790 469 245 62 18 5008
1977-78 0 0 9 278 476 904 1101 1048 715 318 141 9 4999
1978-79 0 0 33 280 483 763 984 1100 520 354 75 6 4598
1979-80 2 3 22 311 425 757 962 967 723 273 74 6 4525
1980-81 0 0 20 311 620 908 1145 727 706 252 148 1 4838
1981-82 0 0 51 363 557 940 1218 808 677 422 58 20 5114
1982-83 0 5 42 289 495 707 936 842 602 410 152 6 4486
1983-84 0 0 70 257 530 979 1123 671 825 397 169 9 5030
1984-85 0 1 96 123 625 643 1101 731 589 252 79 10 4250
1985-86 0 0 41 201 378 962 980 892 613 342 86 6 4501
1986-87 0 23 34 236 598 822 1002 853 576 357 106 1 4608
1987-88 0 1 15 412 511 774 1120 838 613 389 96 27 4796
1988-89 2 0 39 424 504 882 834 792 663 374 145 0 4659
1989-90 0 0 51 229 600 1221 707 631 552 341 102 5 4439
1990-91 1 0 63 195 454 701 907 674 562 289 55 4 3905
1991-92 0 0 49 246 570 809 936 802 730 387 161 8 4698
1992-93 0 1 51 328 529 801 834 934 787 369 61 11 4706
1993-94 0 0 52 292 553 886 1169 861 677 190 180 1 4861
1994-95 0 0 13 256 391 684 798 885 525 307 77 0 3936
1995-96 0 0 30 176 669 958 1024 840 772 345 199 12 5025
1996-97 0 0 42 283 736 778 994 667 597 394 182 53 4726
1997-98 0 0 49 307 633 815 737 647 625 295 59 22 4189
1998-99 0 1 25 263 560 734 919 762 714 349 71 9 4407
1999-00 0 0 37 336 445 794 999 774 508 362 102 8 4365
2000-01 0 1 97 254 616 1079 984 736 715 309 99 12 4902
2001- 2 0 76 289 424 706

2001 Baltimore, Maryland (BWI)

COOLING DEGREE DAYS (base 65 F) 2001 BALTIMORE, MD (BWI)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 5 1 29 140 379 331 166 7 0 0 1058
1973 0 0 0 15 29 263 344 376 173 19 0 0 1219
1974 0 0 4 24 57 126 361 317 130 8 11 0 1038
1975 0 0 0 4 112 252 351 404 85 27 10 0 1245
1976 0 1 0 58 51 315 317 284 114 9 0 0 1149
1977 0 0 10 37 124 217 439 401 229 7 10 0 1474
1978 0 0 0 0 63 260 344 413 182 12 0 0 1274
1979 0 0 15 4 72 183 348 341 145 28 1 0 1137
1980 0 0 0 0 97 203 415 431 245 17 0 0 1408
1981 0 0 0 19 69 287 389 296 141 5 0 0 1206
1982 0 0 0 4 99 160 381 259 119 26 4 1 1053
1983 0 0 0 18 51 228 430 410 214 24 0 0 1375
1984 0 0 0 0 59 268 281 316 98 41 0 2 1065
1985 0 2 7 43 89 179 363 298 178 17 5 0 1181
1986 0 0 0 1 143 295 452 281 158 54 0 0 1384
1987 0 0 0 7 115 292 473 352 152 0 0 0 1391
1988 0 0 2 4 71 274 485 427 100 8 0 0 1371
1989 0 0 14 5 58 276 351 298 178 25 1 0 1206
1990 0 0 19 38 26 261 422 303 137 68 0 0 1274
1991 0 0 2 24 233 303 462 402 177 29 2 0 1634
1992 0 0 0 6 39 168 392 232 139 4 0 0 980
1993 0 0 0 0 70 235 476 371 175 3 5 0 1335
1994 0 0 0 38 49 374 476 292 112 6 3 0 1350
1995 0 0 0 20 72 289 520 475 199 60 3 0 1638
1996 0 0 0 19 70 265 295 259 135 1 0 0 1044
1997 0 0 0 0 20 211 385 287 124 51 0 0 1078
1998 0 0 39 9 115 228 367 341 235 0 0 0 1334
1999 0 0 0 0 54 210 471 340 138 0 0 0 1213
2000 0 0 3 6 102 248 245 269 115 17 0 0 1005
2001 0 0 0 27 54 290 249 381 90 12 2 0 1105

2001 Baltimore, Maryland (BWI)

SNOWFALL (inches) 2001 BALTIMORE, MD (BWI)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 T T T T 1.2 T T 0.0 0.0 1.2
1973-74 0.0 0.0 0.0 0.0 0.0 8.3 1.2 7.6 T T 0.0 0.0 17.1
1974-75 0.0 0.0 0.0 0.0 T 0.4 5.1 5.5 1.2 T 0.0 0.0 12.2
1975-76 0.0 0.0 0.0 0.0 0.0 0.7 1.7 1.3 7.8 0.0 0.0 0.0 11.5
1976-77 0.0 0.0 0.0 0.0 1.1 1.5 8.5 T T T 0.0 0.0 11.1
1977-78 0.0 0.0 0.0 T 0.6 0.5 12.4 12.3 8.5 T 0.0 0.0 34.3
1978-79 0.0 0.0 0.0 0.0 3.7 0.0 5.7 33.1 T T 0.0 0.0 42.5
1979-80 0.0 0.0 0.0 0.3 T 0.1 4.7 3.8 5.7 0.0 0.0 0.0 14.6
1980-81 0.0 0.0 0.0 0.0 T 0.2 4.1 T 0.3 0.0 0.0 0.0 4.6
1981-82 0.0 0.0 0.0 0.0 T 2.4 14.8 7.6 0.7 T 0.0 0.0 25.5
1982-83 0.0 0.0 0.0 0.0 0.0 7.2 1.2 27.2 T T 0.0 0.0 35.6
1983-84 0.0 0.0 0.0 0.0 T T 8.4 T 6.1 T 0.0 0.0 14.5
1984-85 0.0 0.0 0.0 0.0 T 0.1 9.1 0.4 T 0.7 0.0 0.0 10.3
1985-86 0.0 0.0 0.0 0.0 0.0 0.7 1.9 13.0 T T 0.0 0.0 15.6
1986-87 0.0 0.0 0.0 0.0 0.0 T 25.1 10.1 T T 0.0 0.0 35.2
1987-88 0.0 0.0 0.0 0.0 6.0 0.5 13.7 0.2 T T 0.0 0.0 20.4
1988-89 0.0 0.0 0.0 0.0 0.0 0.9 6.0 1.1 0.3 0.0 0.0 0.0 8.3
1989-90 0.0 0.0 0.0 0.0 3.8 10.2 0.5 T 2.7 0.1 0.0 0.0 17.3
1990-91 0.0 0.0 0.0 0.0 0.0 4.8 4.2 0.1 0.3 0.0 0.0 0.0 9.4
1991-92 T 0.0 0.0 0.0 T T 2.2 1.9 T T 0.0 0.0 4.1
1992-93 T 0.0 0.0 0.0 T 1.5 1.4 8.8 12.7 T 0.0 0.0 24.4
1993-94 0.0 0.0 0.0 0.0 T 2.9 4.9 5.3 4.2 T 0.0 0.0 17.3
1994-95 0.0 0.0 0.0 0.0 0.2 0.0 0.3 7.5 0.2 0.0 0.0 0.0 8.2
1995-96 0.0 0.0 0.0 0.0 1.0 2.3 32.6 19.0 7.6
1996-97 0.0 0.3 0.2 5.0 7.1 2.7 T T 0.0
1997-98 0.0 0.0 0.0 0.0 0.0 0.4 0.7 T 2.1 0.0 T 0.0 3.2
1998-99 0.0 0.0 0.0 0.0 0.0 3.0 4.0 0.6 7.6 0.0 0.0 0.0 15.2
1999-00 0.0 0.0 0.0 0.0 0.0 0.2 23.1 2.6 0.0 0.2 0.0 0.0 26.1
2000-01 0.0 0.0 0.0 0.0 T 1.3 3.7 3.7 T T 0.0 0.0 8.7
2001- 0.0 0.0 0.0 0.0 0.0 0.0
POR=50 YRS T 0.0 0.0 0.0 1.0 3.1 6.3 6.3 3.6 0.1 T 0.0 20.4



User Contributions:

Mohammad
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Sep 1, 2012 @ 1:01 am
Wow, your post makes mine look fbeele. More power to you!

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