2001 DES MOINES, IOWA (DSM)



Located in the heart of North America, Des Moines has a climate which is continental in character. This results in a marked seasonal contrast in both temperature and precipitation. There is a gently rolling terrain in and around the Des Moines metropolitan area. Drainage of the area is generally to the southeast to the Des Moines River and its tributaries.

Since agriculture and services for it are the mainstay of the area, it is convenient to separate the year into arbitrary seasons corresponding to the growing seasons of the principal crops of the section. The winter season, when most plant life is dormant, is from mid–November to late March. The summer season, when corn and soybeans can be grown, lasts from early May to early October. The spring growing season, including part of the growing season of oats and forage crops, and the fall harvest season, each runs about 6 weeks. There is a large variation in annual precipitation from a minimum of about 17 inches to a maximum of about 56 inches. The average annual snowfall is 32 inches. Annual variation of snowfall is also large, ranging from a minimum of about 8 inches to as much as 72 inches.

The winter is a season of cold dry air, interrupted by occasional storms of short duration. At the beginning and the end of the season, the precipitation may occur as rain, but during the major portion of the season it falls as snow. Drifting snow may be extensive and impede transportation. The average precipitation for this season is approximately 20 percent of the annual amount. Although occasional cold waves follow the storms, bitterly cold days on which the temperatures fail to rise above zero occur on an average of only 3 days in 4 years.

The average growing season with temperatures above 32 degrees normally spans 160 to 165 days between late April and mid–October. The growing season is characterized by prevailing southerly winds and precipitation falling primarily as showers and thunderstorms, occasionally with damaging wind, erosive downpours or hail. Some 60 percent of the annual precipitation falls during the crop season with the maximum rate normally in late May and June. The autumn is characteristically sunny with diminishing precipitation, a condition favorable for drying and harvesting crops.

NORMALS, MEANS, AND EXTREMES

DES MOINES, IA (DSM)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 14933

41 32′ 16″ N  93 39′58″W  GRND: 968  BARO: 971  CENTRAL (UTC + 6)

2001 Des Moines, Iowa (DSM)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 28.1 33.7 46.9 61.8 73.0 82.2 86.7 84.2 75.6 64.3 48.0 32.6 59.8
MEAN DAILY MAXIMUM 56 28.9 34.6 46.1 61.3 72.4 81.7 86.0 83.9 74.4 64.7 47.3 33.6 59.6
HIGHEST DAILY MAXIMUM 62 65 73 91 93 98 103 105 108 101 95 81 69 108
YEAR OF OCCURRENCE 1989 1972 1986 1980 1967 1988 1955 1983 1939 1963 1999 1984 AUG 1983
MEAN OF EXTREME MAXS. 56 51.2 56.8 72.9 83.3 87.7 93.5 97.0 95.7 89.5 83.6 68.3 56.9 78.0
NORMAL DAILY MINIMUM 30 10.7 15.6 27.6 40.0 51.5 61.2 66.5 63.6 54.5 42.7 29.9 16.1 40.0
MEAN DAILY MINIMUM 56 11.4 16.9 27.2 39.8 51.2 61.1 65.9 63.7 53.3 43.1 29.3 17.4 40.0
LOWEST DAILY MINIMUM 62 -24 -26 -22 9 30 38 47 40 0 14 -4 -22 -26
YEAR OF OCCURRENCE 1970 1996 1962 1975 1967 1945 1971 1950 1996 1972 1991 1989 FEB 1996
MEAN OF EXTREME MINS. 56 -11.6 -5.2 7.2 23.5 36.4 48.0 55.0 52.0 37.0 26.1 11.0 -4.4 22.9
NORMAL DRY BULB 30 19.4 24.7 37.3 50.9 62.3 71.8 76.6 73.9 65.1 53.5 39.0 24.4 49.9
MEAN DRY BULB 56 20.2 25.7 36.5 50.4 61.8 71.3 75.9 73.9 64.0 53.9 38.3 25.5 49.8
MEAN WET BULB 16 20.8 25.2 34.1 44.5 55.4 64.2 68.5 63.2 54.7 47.0 34.3 23.8 44.6
MEAN DEW POINT 16 15.9 19.7 27.4 37.0 49.3 55.9 64.8 59.8 50.3 41.2 28.8 19.4 39.1
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 * 0.2 0.5 4.5 10.0 7.1 1.8 0.1 0.0 0.0 24.2
MAXIMUM 32 30 17.4 13.0 4.6 0.2 0.0 0.0 0.0 0.0 0.0 0.0 3.1 14.4 52.7
MINIMUM 32 30 30.0 25.6 20.7 6.6 0.2 0.0 0.0 0.0 0.2 4.7 18.6 28.9 135.5
MINIMUM 0 30 8.3 4.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 4.1 16.8
H/C NORMAL HEATING DEG. DAYS 30 1414 1128 859 428 165 10 0 11 71 372 780 1259 6497
NORMAL COOLING DEG. DAYS 30 0 0 0 5 81 214 360 287 74 15 0 0 1036
RH NORMAL (PERCENT) 30 71 71 68 63 63 65 68 70 71 66 71 75 68
HOUR 00 LST 30 74 76 73 69 70 72 76 79 79 73 75 78 74
HOUR 06 LST 30 75 78 78 77 77 79 82 85 85 79 79 79 79
HOUR 12 LST 30 66 65 61 55 54 55 57 58 59 56 63 69 60
HOUR 18 LST 30 68 66 60 52 52 53 56 58 60 58 66 72 60
S PERCENT POSSIBLE SUNSHINE 48 51 54 57 56 61 68 72 70 66 62 49 46 59
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 52 2.6 2.3 2.0 1.0 0.9 0.7 0.7 1.3 1.2 1.2 1.7 2.8 18.4
THUNDERSTORMS 62 0.3 0.4 2.1 4.3 7.0 9.0 8.3 7.0 4.9 2.6 1.1 0.3 47.3
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 0 4.8
MIDNIGHT-MIDNIGHT (OKTAS)
MEAN NO. DAYS WITH:
CLEAR 1 1.0 1.0 6.0 3.0 10.0
PARTLY CLOUDY 1 2.0 3.0 2.0 1.0
CLOUDY 1 3.0 3.0 7.0 12.0 10.0
PR MEAN STATION PRESSURE (IN) 27 29.10 29.09 29.00 28.90 28.90 28.90 29.00 29.00 29.00 29.01 29.00 29.10 29.00
MEAN SEA-LEVEL PRES. (IN) 16 30.11 30.12 30.05 29.94 29.94 30.01 29.97 30.01 30.03 30.05 30.06 30.13 30.03
WINDS MEAN SPEED (MPH) 49 11.4 11.3 12.5 12.8 11.0 10.2 8.9 8.7 9.5 10.4 11.7 11.2 10.8
PREVAIL. DIR (TENS OF DEGS) 30 32 32 32 32 18 18 18 15 18 18 32 32 18
MAXIMUM 2-MINUTE:
SPEED (MPH) 6 43 41 45 51 52 53 49 53 52 46 52 40 53
DIR. (TENS OF DEGS) 30 30 31 29 32 22 02 28 29 29 25 28 22
YEAR OF OCCURRENCE 2000 1999 1996 1996 2000 2000 2000 1998 2001 1996 1998 2001 JUN 2000
MAXIMUM 5-SECOND:
SPEED (MPH) 6 52 51 53 64 59 68 61 70 60 57 62 47 70
DIR. (TENS OF DEGS) 33 29 29 28 32 21 01 29 28 28 26 28 29
YEAR OF OCCURRENCE 1996 1996 1996 1996 2000 2000 2000 1998 2001 1996 1998 2001 AUG 1998
PRECIPITATION NORMAL (IN) 30 0.96 1.11 2.33 3.36 3.66 4.46 3.78 4.20 3.53 2.62 1.79 1.32 33.12
MAXIMUM MONTHLY (IN) 62 4.38 2.99 5.82 7.76 12.13 14.19 10.51 13.68 10.19 7.29 6.52 3.43 14.19
YEAR OF OCCURRENCE 1960 1951 1990 1976 1996 1947 1958 1977 1961 1941 1983 1982 JUN 1947
MINIMUM MONTHLY (IN) 62 0.04 0.13 0.17 0.23 1.23 1.02 0.04 0.25 0.41 0.03 0.03 0.03 0.03
YEAR OF OCCURRENCE 1997 1968 1994 1985 1949 1992 1975 1984 1950 1952 1969 1998 DEC 1998
MAXIMUM IN 24 HOURS (IN) 62 2.97 1.77 2.42 3.80 3.23 5.50 5.14 6.18 4.47 2.81 3.35 1.69 6.18
YEAR OF OCCURRENCE 1960 1961 1945 1974 1996 1947 1958 1975 1961 1947 1952 1982 AUG 1975
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 7.7 7.2 10.1 10.7 11.5 10.2 9.6 9.1 9.2 8.0 7.6 8.8 109.7
PRECIPITATION 1.00 30 0.1 0.1 0.3 0.7 0.8 1.2 1.0 1.3 0.8 0.7 0.3 0.1 7.4
SNOWFALL NORMAL (IN) 30 7.6 7.9 5.6 2.4 T 0.0 0.0 0.0 T 0.4 3.2 7.7 34.8
MAXIMUM MONTHLY (IN) 57 22.3 21.3 18.8 15.6 0.2 T T 0.0 T 7.4 14.7 23.9 23.9
YEAR OF OCCURRENCE 1996 1962 1948 1982 1944 1993 1992 1992 1980 1991 1961 DEC 1961
MAXIMUM IN 24 HOURS (IN) 57 19.8 12.1 8.5 10.4 0.2 T T 0.0 T 7.4 11.8 11.0 19.8
YEAR OF OCCURRENCE 1942 1950 1957 1973 1944 1993 1992 1992 1980 1968 1961 JAN 1942
MAXIMUM SNOW DEPTH (IN) 51 16 17 18 12 0 0 0 0 0 5 10 30 30
YEAR OF OCCURRENCE 2001 1979 1960 1973 1980 1968 1962 DEC 1962
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 2.4 2.4 1.6 0.6 0.0 0.0 0.0 0.0 0.0 0.1 0.9 2.4 10.4

2001 Des Moines, Iowa (DSM)

PRECIPITATION (inches) 2001 DES MOINES, IA (DSM)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.44 0.63 1.05 3.56 3.05 2.58 5.86 6.65 5.45 2.36 2.43 1.96 36.02
1973 2.09 2.21 4.15 4.67 5.01 2.04 9.17 1.37 7.07 3.26 1.49 2.65 45.18
1974 1.51 0.84 1.99 6.31 7.19 4.62 1.33 2.81 2.08 3.96 1.20 1.83 35.67
1975 1.41 1.48 1.90 2.65 3.41 5.98 0.04 9.73 1.70 0.63 2.20 0.48 31.61
1976 0.23 2.43 3.04 7.76 2.84 7.25 1.87 2.26 1.00 1.11 0.10 0.12 30.01
1977 0.50 0.36 3.57 2.45 2.29 1.25 2.63 13.68 2.82 5.10 0.69 1.81 37.15
1978 0.28 1.27 0.90 4.57 3.49 2.74 2.95 3.10 6.39 1.14 3.16 1.37 31.36
1979 1.72 0.52 4.23 3.23 2.50 5.78 2.96 5.07 0.97 3.23 1.43 0.20 31.84
1980 1.80 0.64 1.15 0.86 1.94 5.56 1.52 7.24 1.03 1.90 0.45 1.00 25.09
1981 0.25 0.97 0.39 2.00 2.46 5.02 5.76 6.32 2.30 2.06 2.63 1.14 31.30
1982 2.63 0.78 3.30 5.03 5.79 2.59 7.00 5.25 2.94 3.44 2.62 3.43 44.80
1983 1.17 1.95 3.72 3.80 3.93 3.65 2.44 3.01 3.87 5.54 6.52 1.57 41.17
1984 0.99 0.82 1.65 5.85 5.58 7.81 6.22 0.25 2.76 6.28 1.16 2.41 41.78
1985 0.64 1.98 3.37 0.23 1.56 3.72 2.04 2.83 5.42 3.75 1.65 1.31 28.50
1986 0.12 1.76 2.92 5.66 4.35 7.08 3.90 4.52 6.41 3.89 0.99 0.98 42.58
1987 0.42 1.38 2.99 2.92 3.75 2.10 5.08 10.04 1.40 1.03 3.27 2.59 36.97
1988 0.37 0.59 0.66 0.75 1.46 2.75 4.78 3.05 2.89 0.59 3.38 0.84 22.11
1989 1.30 1.05 0.37 1.95 3.62 2.22 3.65 6.53 5.41 2.28 0.19 0.57 29.14
1990 1.43 0.89 5.82 3.43 4.36 9.52 8.75 1.83 1.40 1.80 2.52 2.18 43.93
1991 0.95 0.17 3.90 7.54 7.88 2.87 1.14 3.65 0.90 4.96 3.61 2.20 39.77
1992 0.97 2.12 2.13 3.99 1.45 1.02 7.76 1.39 4.99 0.51 5.20 1.98 33.51
1993 1.59 1.52 3.22 2.96 7.51 7.68 9.75 12.24 5.79 1.70 1.06 0.86 55.88
1994 1.22 1.71 0.17 2.71 1.76 5.29 4.30 2.81 3.11 1.02 1.68 2.42 28.20
1995 0.98 0.68 2.75 6.04 6.29 2.88 4.36 1.04 3.12 1.24 1.57 0.08 31.03
1996 2.99 0.57 1.38 2.12 12.13 2.95 4.02 2.54 4.05 2.87 2.40 0.52 38.54
1997 0.04 0.77 0.85 4.11 3.95 4.90 2.89 2.36 2.14 4.62 1.13 0.77 28.53
1998 0.60 1.23 3.03 1.79 4.97 9.95 4.28 5.65 0.69 3.39 2.09 0.03 37.70
1999 0.26 0.63 0.90 4.43 5.82 3.46 2.78 4.56 2.32 0.36 1.28 0.35 27.15
2000 0.27 1.32 0.35 2.36 3.37 7.60 4.12 1.71 1.84 1.07 1.57 0.56 26.14
2001 1.31 2.08 1.08 2.20 7.46 2.61 1.04 2.22 4.77 2.12 0.86 0.70 28.45
POR=50 YRS 1.10 1.15 1.96 2.98 4.32 4.66 3.46 3.65 3.24 2.38 1.60 1.16 31.66

2001 Des Moines, Iowa (DSM)

AVERAGE TEMPERATURE (F) 2001 DES MOINES, IA (DSM)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 16.6 19.9 37.1 48.9 62.5 70.2 73.9 72.4 64.6 48.0 33.9 18.4 47.2
1973 22.0 27.7 45.6 49.2 59.8 73.6 76.4 76.9 65.7 59.0 40.7 22.1 51.6
1974 19.5 28.0 39.8 53.0 60.3 69.1 80.9 71.1 60.9 55.0 39.6 28.2 50.5
1975 22.7 22.4 29.7 46.9 65.9 72.3 77.9 77.1 61.8 57.2 43.5 29.9 50.6
1976 22.9 34.1 39.7 55.4 60.7 71.4 77.2 73.8 65.7 48.5 32.6 21.8 50.3
1977 10.1 29.8 44.7 58.5 69.5 74.7 81.0 72.1 66.5 52.3 39.1 23.2 51.8
1978 11.0 13.3 33.2 50.5 61.6 72.8 75.8 75.1 70.5 52.4 39.0 23.0 48.2
1979 7.5 13.8 35.2 47.0 61.1 70.9 74.5 74.3 66.8 54.3 38.0 31.6 47.9
1980 23.4 21.3 34.7 52.0 63.5 71.2 79.9 76.2 66.8 49.6 41.6 26.6 50.6
1981 25.7 29.8 42.7 57.6 60.4 72.9 76.1 72.4 66.0 51.7 42.8 25.5 52.0
1982 9.6 22.9 35.4 46.9 64.7 67.1 76.9 73.2 64.9 54.6 38.4 31.6 48.9
1983 27.3 32.3 39.4 45.4 58.4 73.2 80.9 83.3 67.7 52.6 40.7 9.8 50.9
1984 19.7 35.5 31.1 48.8 58.7 73.2 75.9 77.5 62.4 52.8 39.5 27.6 50.2
1985 15.8 22.2 42.0 55.2 65.1 68.4 76.5 71.9 64.8 52.6 30.0 13.4 48.2
1986 26.9 21.7 42.5 53.9 62.6 73.3 77.2 69.3 67.4 52.6 33.3 28.8 50.8
1987 26.6 35.7 42.7 54.6 66.8 74.7 78.5 72.1 65.2 48.2 43.1 30.0 53.2
1988 19.6 21.6 40.2 51.4 67.4 75.6 78.5 78.8 66.9 47.9 39.8 28.8 51.4
1989 32.5 15.4 37.1 52.3 61.0 68.9 77.1 73.3 62.2 54.1 36.0 16.9 48.9
1990 31.7 31.1 42.0 50.0 57.9 71.6 73.8 74.4 68.1 52.4 43.7 22.9 51.6
1991 16.8 33.5 42.5 53.6 66.7 74.8 76.1 73.7 65.0 52.5 30.9 30.6 51.4
1992 30.7 34.9 42.4 48.9 62.0 70.3 71.2 68.3 63.1 53.4 34.9 27.1 50.6
1993 21.3 21.5 34.1 47.1 61.0 69.0 73.8 73.8 59.2 50.4 36.4 28.4 48.0
1994 13.0 21.3 40.5 50.9 62.5 72.4 73.0 71.3 66.4 55.5 42.1 30.3 49.9
1995 20.8 28.8 39.8 47.4 58.9 71.0 76.4 79.1 63.2 52.9 33.3 26.0 49.8
1996 17.3 25.0 32.5 47.8 57.7 70.9 72.7 72.3 0.0 53.4 32.1 22.2 42.0
1997 17.5 27.6 40.0 45.9 55.9 72.1 75.6 72.1 66.4 53.7 34.5 28.8 49.2
1998 25.9 36.3 33.6 50.8 66.5 68.1 75.4 75.2 70.4 54.0 42.4 30.3 52.4
1999 20.2 35.2 38.7 51.4 61.3 70.7 79.7 72.4 62.9 53.7 47.4 29.9 52.0
2000 25.4 36.5 45.1 52.0 64.8 69.3 73.8 75.5 67.2 57.7 33.9 11.6 51.1
2001 23.6 20.3 32.2 56.2 61.7 70.6 78.0 75.2 63.5 52.2 49.8 32.4 51.3
POR=123 YRS 20.7 25.2 36.8 50.6 61.6 71.2 76.1 73.8 64.9 53.8 38.4 26.0 49.9

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 Des Moines, Iowa (DSM)

HEATING DEGREE DAYS (base 65 F) 2001 DES MOINES, IA (DSM)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 7 10 112 523 925 1442 1326 1039 594 470 173 0 6621
1973-74 0 0 68 209 719 1325 1406 1033 775 363 189 20 6107
1974-75 0 12 168 307 755 1131 1308 1185 1090 539 81 11 6587
1975-76 0 0 148 267 637 1085 1297 890 780 302 160 4 5570
1976-77 0 1 76 527 964 1333 1700 981 624 234 25 2 6467
1977-78 0 3 35 388 769 1289 1667 1442 988 427 181 9 7198
1978-79 0 0 48 385 776 1293 1779 1433 912 532 163 13 7334
1979-80 1 10 57 339 801 1031 1281 1263 932 408 124 9 6256
1980-81 0 0 77 473 695 1182 1214 979 684 241 177 0 5722
1981-82 6 2 57 406 660 1218 1713 1175 911 536 73 30 6787
1982-83 0 6 113 326 791 1026 1162 908 787 587 219 17 5942
1983-84 0 0 96 394 720 1709 1401 851 1043 488 217 1 6920
1984-85 0 0 172 376 759 1154 1520 1192 707 335 59 27 6301
1985-86 0 0 172 378 1046 1596 1181 1208 702 344 116 2 6745
1986-87 0 25 51 378 941 1114 1184 813 687 336 58 6 5593
1987-88 0 24 54 513 648 1083 1399 1254 764 400 33 3 6175
1988-89 0 6 35 524 749 1114 1002 1384 866 417 170 31 6298
1989-90 0 6 140 345 865 1489 1025 943 703 469 221 21 6227
1990-91 3 0 85 394 633 1301 1491 875 699 355 112 0 5948
1991-92 0 1 144 395 1019 1058 1054 868 691 486 152 9 5877
1992-93 0 26 135 363 897 1169 1344 1210 953 528 151 42 6818
1993-94 0 2 185 460 851 1129 1606 1221 751 437 132 17 6791
1994-95 0 11 74 292 681 1071 1363 1007 774 521 191 20 6005
1995-96 3 0 136 381 945 1201 1471 1155 1002 514 264 31 7103
1996-97 0 364 982 1322 1468 1043 764 568 288 0
1997-98 4 0 52 409 908 1118 1207 799 967 419 45 67 5995
1998-99 0 0 26 339 674 1067 1384 824 808 402 147 27 5698
1999-00 0 2 130 355 522 1080 1218 821 615 388 90 20 5241
2000-01 0 0 85 241 930 1647 1274 1244 1009 286 154 33 6903
2001- 0 0 105 399 499 1065

2001 Des Moines, Iowa (DSM)

COOLING DEGREE DAYS (base 65 F) 2001 DES MOINES, IA (DSM)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 3 77 184 289 247 109 0 0 0 909
1973 0 0 0 2 19 267 358 378 98 30 0 0 1152
1974 0 0 0 9 52 149 499 209 52 4 0 0 974
1975 0 0 0 3 116 237 408 383 58 32 0 0 1237
1976 0 0 0 19 36 203 385 283 104 20 0 0 1050
1977 0 0 0 48 172 298 505 232 86 1 0 0 1342
1978 0 0 6 0 83 251 341 321 221 3 0 0 1226
1979 0 0 0 0 48 194 304 305 118 15 0 0 984
1980 0 0 0 22 83 200 469 353 138 2 0 0 1267
1981 0 0 1 27 42 243 358 239 95 2 0 0 1007
1982 0 0 0 0 71 101 374 269 120 11 0 0 946
1983 0 0 0 4 20 272 502 574 183 19 0 0 1574
1984 0 0 0 8 27 254 345 397 101 2 0 0 1134
1985 0 0 0 46 69 134 361 221 174 0 0 0 1005
1986 0 0 11 17 46 258 386 162 130 0 0 0 1010
1987 0 0 0 31 121 304 426 250 65 0 0 0 1197
1988 0 0 0 1 112 329 425 444 101 3 0 0 1415
1989 0 0 6 44 53 156 379 269 61 15 0 0 983
1990 0 0 1 26 5 226 283 297 184 11 2 0 1035
1991 0 0 9 19 172 302 349 279 150 14 0 0 1294
1992 0 0 0 10 64 174 197 134 86 10 0 0 675
1993 0 0 0 0 31 167 281 280 19 15 0 0 793
1994 0 0 0 22 65 245 253 213 125 4 0 0 927
1995 0 0 0 0 9 206 361 440 90 11 0 0 1117
1996 0 0 0 4 44 212 245 231 10 0 0
1997 0 0 0 0 14 223 338 228 101 65 0 0 969
1998 0 0 2 1 99 165 330 323 190 3 0 0 1113
1999 0 0 0 0 40 204 463 236 72 11 1 0 1027
2000 0 0 3 4 90 156 278 334 157 25 0 0 1047
2001 0 0 0 28 61 207 409 322 67 6 0

2001 Des Moines, Iowa (DSM)

SNOWFALL (inches) 2001 DES MOINES, IA (DSM)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 T 10.2 9.5 15.3 4.6 T 15.1 0.0 0.0 54.7
1973-74 0.0 0.0 0.0 0.0 T 9.6 10.6 6.1 1.9 1.2 0.0 0.0 29.4
1974-75 0.0 0.0 0.0 0.0 9.3 9.1 13.3 17.9 5.6 4.5 0.0 0.0 59.7
1975-76 0.0 0.0 0.0 0.0 7.0 0.5 2.4 11.8 0.9 0.0 T 0.0 22.6
1976-77 0.0 0.0 0.0 T 1.1 2.8 7.6 0.9 4.8 1.9 0.0 0.0 19.1
1977-78 0.0 0.0 0.0 0.0 2.2 22.0 2.7 18.6 9.9 0.3 0.0 0.0 55.7
1978-79 0.0 0.0 0.0 0.0 5.8 11.0 16.6 8.2 4.1 8.0 0.0 0.0 53.7
1979-80 0.0 0.0 0.0 T 0.7 0.4 7.9 5.7 5.8 2.8 0.0 0.0 23.3
1980-81 0.0 0.0 0.0 7.4 T 2.7 3.7 6.6 T 0.0 0.0 0.0 20.4
1981-82 0.0 0.0 0.0 0.4 3.2 10.7 18.5 2.6 11.9 15.6 0.0 0.0 62.9
1982-83 0.0 0.0 0.0 0.8 0.3 3.6 4.2 16.8 13.2 12.6 0.0 0.0 51.5
1983-84 0.0 0.0 0.0 T 9.8 19.6 12.5 1.3 13.7 0.1 0.0 0.0 57.0
1984-85 0.0 0.0 0.0 T 2.7 7.6 7.7 6.9 6.7 T 0.0 0.0 31.6
1985-86 0.0 0.0 T 0.0 8.1 15.9 1.3 6.7 0.2 0.1 0.0 0.0 32.3
1986-87 0.0 0.0 0.0 T 3.1 2.9 5.1 2.8 5.5 0.0 0.0 0.0 19.4
1987-88 0.0 0.0 0.0 T 0.1 13.0 1.2 7.6 0.8 0.0 0.0 0.0 22.7
1988-89 0.0 0.0 0.0 0.0 1.1 1.0 0.1 16.3 1.2 0.6 T 0.0 20.3
1989-90 0.0 0.0 0.0 T 1.7 6.6 11.3 7.4 0.1 T 0.0 0.0 27.1
1990-91 0.0 0.0 0.0 T 1.3 12.1 9.9 0.4 0.2 T T 0.0 23.9
1991-92 0.0 0.0 0.0 T 14.7 1.2 1.9 4.5 0.2 0.1 0.0 0.0 22.6
1992-93 T 0.0 T T 10.0 3.7 11.1 10.1 5.1 1.5 T T 41.5
1993-94 0.0 0.0 0.0 0.2 0.9 2.0 8.8 15.2 0.5 0.7 0.0 0.0 28.3
1994-95 0.0 0.0 0.0 0.0 0.2 12.4 8.7 2.0 5.3 0.4 T 0.0 29.0
1995-96 0.0 0.0 0.0 1.8 6.5 22.3 1.6
1996-97
1997-98
1998-99
1999-00
2000-01
2001-
POR=56 YRS T 0.0 T 0.3 3.1 6.7 8.3 7.1 5.9 1.8 0.0 T 33.2



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