2001 RAPID CITY, SOUTH DAKOTA (RAP)



Rapid City, which is not far from the geographical center of North America, experiences the large temperature ranges, both daily and seasonal, that are typical of semi–arid continental climates.

The city is surrounded by contrasting landforms, with the forested Black Hills rising immediately west of the city, and rolling prairie extending out in the other directions. From 40 to 70 miles southeast lie the eroded Badlands. The Black Hills, many of which are more than 5,000 feet above sea level, with a number of peaks above 7,000 feet, exert a pronounced influence on the climate of this area. The rolling land to the east of the city is cut by the valleys of the Box Elder and Rapid Creeks, which flow generally east–southeastward. The station is located on the north slope of the irrigated Rapid Valley. An east–west ridge 200 to 300 feet higher than the airport separates the station from the Box Elder Creek Valley.

The principal agricultural products in the area are cattle and wheat, and ranchers and farmers are dependent on the current weather forecasts, which are at times of vital interest in the protection of livestock.

Although the annual precipitation is light at lower elevations, the distribution is beneficial to agriculture with the greatest amounts occurring during the growing season. The heaviest snows are expected in the spring, which helps to furnish moisture for the early maturing crops such as wheat, while heavy winter snows at the higher elevations provide irrigation water for the fertile valleys.

Summer days are normally warm with cool, comfortable nights. Nearly all of the summer precipitation occurs as thunderstorms. Hail is often associated with the more severe thunderstorms, with resultant damage to vegetation as well as other fragile material in the path of the storms. Autumn, which begins soon after the first of September, is characterized by mild, balmy days, and cool, invigorating mornings and evenings. Autumn weather usually extends into November and often into December.

Temperatures for the winter months of December, January, and February are among the warmest in South Dakota due to the protection of the Black Hills, the frequent occurrence of Chinook winds, and the fact that the winter tracks of arctic air masses usually pass east of Rapid City. Rapid City has become the retirement home for many farmers and ranchers from the western half of the state because of the cool summer nights and the relatively mild winters.

Snowfall is normally light with the greatest monthly average of about 8 inches occurring in March. Cold waves can be expected occasionally, and one or more blizzards may occur each winter.

Spring is characterized by unsettled conditions. Wide variations usually occur in temperatures, and snows may fall as late as May.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is September 29 and the average last occurrence in the spring is May 7.

NORMALS, MEANS, AND EXTREMES

RAPID CITY, SD (RAP)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 24090

44 02′ 44″ N  103 03′ 14″ W  GRND:  3150  BARO: &#x 0A0;3153  MOUNTAIN (UTC + 7)

2001 Rapid City, South Dakota (RAP)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 33.8 38.2 45.9 57.9 68.1 77.8 86.2 85.1 74.4 62.5 46.7 35.6 59.4
MEAN DAILY MAXIMUM 53 33.8 38.4 45.4 57.4 67.8 77.6 86.2 86.0 75.1 61.4 46.6 37.1 59.4
HIGHEST DAILY MAXIMUM 59 76 75 82 93 98 106 110 106 104 94 83 75 110
YEAR OF OCCURRENCE 1987 1995 1993 1989 1969 1988 1989 1988 1978 1993 1999 1965 JUL 1989
MEAN OF EXTREME MAXS. 53 60.2 63.0 71.7 81.7 87.5 94.3 100.6 100.0 94.9 83.8 71.1 62.7 81.0
NORMAL DAILY MINIMUM 30 10.7 15.2 22.2 32.2 42.3 51.7 58.2 56.1 45.5 34.9 22.8 12.7 33.7
MEAN DAILY MINIMUM 53 10.5 15.2 21.8 32.0 43.0 52.0 58.3 57.0 46.2 34.9 22.8 14.0 34.0
LOWEST DAILY MINIMUM 59 -27 -31 -21 1 18 31 39 38 18 -2 -19 -30 -31
YEAR OF OCCURRENCE 1950 1996 1996 1975 1950 1951 1987 1992 1985 1991 1959 1990 FEB 1996
MEAN OF EXTREME MINS. 53 -12.3 -7.2 1.2 17.1 29.5 40.0 48.1 46.2 30.4 18.8 3.3 -9.4 17.1
NORMAL DRY BULB 30 22.3 26.7 34.1 45.1 55.2 64.8 72.2 70.6 60.0 48.7 34.8 24.2 46.6
MEAN DRY BULB 53 22.1 26.7 33.6 44.8 55.4 65.0 72.3 71.5 60.8 48.2 34.7 25.6 46.7
MEAN WET BULB 16 20.8 23.5 30.5 38.5 48.9 57.1 61.3 59.9 50.4 38.0 28.7 21.5 39.9
MEAN DEW POINT 16 13.8 16.1 23.1 29.8 42.1 51.2 54.4 52.0 41.5 29.6 21.4 14.1 32.4
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.1 0.5 3.7 11.4 11.2 3.3 0.2 0.0 0.0 30.4
MAXIMUM 32 30 13.3 9.3 5.7 0.7 0.0 0.0 0.0 0.0 0.0 0.3 5.0 11.8 46.1
MINIMUM 32 30 30.0 26.6 26.8 14.8 2.5 * 0.0 0.0 2.0 10.9 24.9 30.0 168.5
MINIMUM 0 30 8.1 4.2 1.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 5.0 19.6
H/C NORMAL HEATING DEG. DAYS 30 1324 1072 958 597 311 103 18 31 211 505 906 1265 7301
NORMAL COOLING DEG. DAYS 30 0 0 0 0 7 97 241 205 61 0 0 0 611
RH NORMAL (PERCENT) 30 64 65 64 59 61 62 56 53 54 54 62 65 60
HOUR 05 LST 30 66 71 74 73 76 77 74 71 70 66 70 69 71
HOUR 11 LST 30 58 58 55 48 50 51 45 41 42 42 52 59 50
HOUR 17 LST 30 62 59 52 45 47 47 40 36 39 45 58 64 50
HOUR 23 LST 30 67 70 71 68 71 72 66 62 63 63 68 68 67
S PERCENT POSSIBLE SUNSHINE 54 57 60 63 62 60 65 73 74 70 66 55 55 63
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 60 1.7 2.2 2.8 1.9 1.2 1.2 0.6 0.6 0.6 0.8 2.1 2.0 17.7
THUNDERSTORMS 60 0.0 0.0 0.1 1.2 5.6 10.4 11.4 8.3 3.2 0.4 0.0 0.0 40.6
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 1 9.6 3.2 4.8 5.6 5.6
MIDNIGHT-MIDNIGHT (OKTAS) 1 9.6 3.2 6.4
MEAN NO. DAYS WITH:
CLEAR 1 7.0 3.0 1.0 10.0
PARTLY CLOUDY 1 4.0 3.0 6.0 7.0 9.0
CLOUDY 1 3.0 6.0 9.0 21.0 4.0
PR MEAN STATION PRESSURE(IN) 29 26.71 26.71 26.67 26.66 26.67 26.68 26.73 26.74 26.75 26.74 26.70 26.70 26.71
MEAN SEA-LEVEL PRES. (IN) 17 30.07 30.08 30.01 29.95 29.92 29.90 29.93 29.95 29.98 30.02 30.05 30.11 30.00
WINDS MEAN SPEED (MPH) 34 10.5 11.1 12.3 12.9 11.9 10.8 10.1 10.0 10.7 11.0 11.0 10.5 11.1
PREVAIL. DIR (TENS OF DEGS) 22 33 33 33 33 33 33 33 33 33 33 33 33 33
MAXIMUM 2-MINUTE:
SPEED (MPH) 6 51 59 54 61 57 54 53 49 47 55 57 52 61
DIR. (TENS OF DEGS) 33 33 33 32 32 32 24 32 33 33 33 33 32
YEAR OF OCCURRENCE 2001 1998 2000 1997 1999 2001 2001 2000 1999 1999 1998 1996 APR 1997
MAXIMUM 5-SECOND:
SPEED (MPH) 6 60 70 62 69 68 69 66 58 56 67 67 61 70
DIR. (TENS OF DEGS) 32 31 33 31 32 33 23 32 34 34 33 33 31
YEAR OF OCCURRENCE 1997 1996 2000 1997 1999 2001 2001 2000 1999 1999 1998 1996 FEB 1996
PRECIPITATION NORMAL (IN) 30 0.39 0.52 1.03 1.89 2.68 3.06 2.04 1.67 1.23 1.10 0.56 0.47 16.64
MAXIMUM MONTHLY (IN) 59 1.77 2.46 3.02 5.16 8.18 7.00 6.13 4.83 3.94 5.60 2.22 1.65 8.18
YEAR OF OCCURRENCE 1944 1953 1945 1967 1996 1968 1969 1982 1946 1998 1985 1975 MAY 1996
MINIMUM MONTHLY (IN) 59 0.01 0.02 0.12 0.02 0.33 0.64 0.38 0.10 0.03 T 0.03 0.01 T
YEAR OF OCCURRENCE 1952 1999 1981 1987 1966 1973 1988 1943 1975 1960 1945 2001 OCT 1960
MAXIMUM IN 24 HOURS (IN) 59 1.26 1.00 2.19 3.19 3.40 4.01 2.51 2.60 2.13 2.49 1.09 1.04 4.01
YEAR OF OCCURRENCE 1944 1953 1945 1997 1965 1963 1944 1982 1966 1982 1944 1975 JUN 1963
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 6.7 7.2 8.4 9.6 11.7 11.7 9.3 7.8 7.2 5.2 5.6 6.8 97.2
PRECIPITATION 1.00 30 0.0 0.0 0.1 0.2 0.4 0.7 0.4 0.2 0.2 0.2 0.0 * 2.4
SNOWFALL NORMAL (IN) 30 4.3 6.5 9.3 6.3 0.7 0.* 0.0 0.0 0.2 1.6 5.2 5.8 39.9
MAXIMUM MONTHLY (IN) 57 24.0 23.7 30.7 30.6 11.6 3.6 T T 2.0 10.2 33.6 17.9 33.6
YEAR OF OCCURRENCE 1949 1953 1950 1970 1950 1951 1993 1994 1970 1995 1985 1975 NOV 1985
MAXIMUM IN 24 HOURS (IN) 57 16.3 10.0 14.9 16.0 13.4 3.6 T T 2.0 7.8 9.4 9.8 16.3
YEAR OF OCCURRENCE 1944 1953 1973 1970 1967 1951 1993 1994 1970 1995 1977 1975 JAN 1944
MAXIMUM SNOW DEPTH (IN) 49 16 14 16 17 13 2 0 0 1 6 15 11 17
YEAR OF OCCURRENCE 1993 1987 1977 1970 1967 1951 1965 1954 1985 1985 APR 1970
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 1.3 2.3 2.7 1.8 0.2 0.0 0.0 0.0 0.1 0.5 1.7 1.9 12.5

2001 Rapid City, South Dakota (RAP)

PRECIPITATION (inches) 2001 RAPID CITY, SD (RAP)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.22 0.44 0.47 2.78 3.28 4.11 1.67 2.49 0.24 0.77 0.38 0.34 17.19
1973 0.11 0.31 2.71 2.69 2.37 0.64 1.46 0.74 1.44 1.38 0.73 0.54 15.12
1974 0.16 0.30 0.34 1.55 1.32 1.10 0.68 1.37 0.88 1.18 0.12 0.12 9.12
1975 1.05 0.35 2.45 1.37 1.23 5.63 1.57 0.87 0.03 0.69 0.57 1.65 17.46
1976 0.28 0.47 0.33 2.70 2.74 4.81 1.05 1.31 0.28 0.21 0.61 0.41 15.20
1977 0.83 0.25 2.63 1.57 2.49 1.76 2.98 1.79 2.86 1.06 0.82 0.36 19.40
1978 0.19 0.84 0.40 2.19 3.12 2.01 4.08 1.42 0.18 0.26 0.63 0.25 15.57
1979 0.49 0.33 0.47 0.31 1.17 3.60 4.11 2.32 0.07 0.90 0.15 0.07 13.99
1980 0.20 0.51 0.86 1.13 1.58 4.75 1.78 2.38 0.48 2.28 0.57 0.66 17.18
1981 0.14 0.09 0.12 0.32 2.81 1.89 4.47 1.74 0.16 1.81 0.23 0.35 14.13
1982 0.39 0.37 1.35 0.69 6.50 2.89 1.81 4.83 2.69 3.82 0.27 0.36 25.97
1983 0.34 0.18 0.84 1.00 2.18 3.01 1.94 2.39 0.33 1.74 1.07 0.47 15.49
1984 0.10 0.18 0.69 3.10 1.57 4.72 1.57 1.00 0.74 0.67 0.51 0.38 15.23
1985 0.46 0.06 1.55 0.32 1.24 1.58 1.03 1.86 1.57 0.98 2.22 0.77 13.64
1986 0.49 0.92 0.88 4.74 1.43 4.56 0.91 1.32 3.14 1.64 1.40 0.01 21.44
1987 0.04 1.71 1.14 0.02 3.39 1.37 0.83 2.37 0.68 0.26 0.30 0.31 12.42
1988 0.17 0.34 0.52 0.60 3.25 1.09 0.38 1.98 0.56 0.76 0.81 0.46 10.92
1989 0.02 0.34 0.96 1.46 1.40 1.04 0.82 1.70 3.09 1.49 0.43 0.82 13.57
1990 0.22 0.37 1.17 0.77 4.87 1.42 1.94 1.87 2.44 0.61 0.44 0.33 16.45
1991 0.32 0.77 0.63 2.99 4.40 3.27 1.97 0.58 0.59 1.00 0.73 0.04 17.29
1992 0.29 0.16 1.92 0.71 2.47 2.17 3.25 0.47 0.42 0.68 0.39 0.57 13.50
1993 0.68 0.61 0.82 3.05 2.16 3.39 4.31 1.18 1.46 0.90 0.70 0.53 19.79
1994 0.45 0.66 0.37 1.20 1.47 0.67 0.64 0.92 0.27 2.84 0.66 0.35 10.50
1995 0.09 0.55 0.79 2.57 4.03 4.50 2.87 0.46 0.82 2.42 0.42 0.13 19.65
1996 0.85 0.10 1.06 1.63 8.18 1.24 0.52 1.85 1.55 0.07
1997 0.65 0.28 0.20 4.80 5.35 3.43 3.67 3.93 0.78 0.47 0.19 0.08 23.83
1998 0.15 1.24 1.32 0.28 2.34 5.59 1.26 1.42 1.50 5.60 1.13 0.06 21.89
1999 0.21 0.02 1.32 2.45 4.49 5.24 3.68 0.47 0.85 0.11 0.43 0.21 19.48
2000 0.23 0.15 1.37 3.95 2.40 1.60 2.06 0.70 0.45 1.54 0.47 0.11 15.03
2001 0.24 0.17 0.42 2.16 1.73 3.57 2.46 1.59 0.91 0.97 0.07 T 14.29
POR=102 YRS 0.42 0.48 0.99 1.96 3.11 3.22 2.21 1.52 1.20 1.03 0.60 0.49 17.23

2001 Rapid City, South Dakota (RAP)

AVERAGE TEMPERATURE (F) 2001 RAPID CITY, SD (RAP)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 17.3 24.0 36.5 43.6 55.2 64.7 65.6 69.1 59.4 43.8 31.0 18.6 44.1
1973 26.8 28.9 37.5 42.9 53.7 64.7 70.7 74.3 57.1 51.3 32.3 25.4 47.1
1974 21.9 32.5 37.6 47.2 53.8 66.6 77.3 67.7 57.6 51.7 36.4 28.9 48.3
1975 23.7 17.6 27.6 40.5 54.0 62.2 74.7 70.3 58.5 49.2 33.8 29.4 45.1
1976 23.9 34.6 34.4 46.9 55.4 64.3 72.8 72.6 63.3 45.4 31.7 26.8 47.7
1977 12.7 34.6 36.4 49.5 60.3 69.0 73.4 66.0 61.0 48.8 33.3 21.9 47.2
1978 11.0 15.3 35.4 45.2 55.1 65.1 71.1 69.7 66.2 50.5 29.2 17.1 44.2
1979 7.4 16.8 35.4 44.4 53.6 65.4 70.4 68.5 66.3 50.9 33.0 33.2 45.4
1980 21.0 27.1 31.5 48.9 57.4 67.1 74.9 68.6 61.6 48.9 39.3 30.3 48.1
1981 32.6 29.4 40.0 51.5 54.9 64.9 72.0 70.0 63.5 47.7 40.4 25.8 49.4
1982 11.9 23.9 33.0 42.1 53.3 59.7 70.7 70.2 58.7 47.2 32.7 28.6 44.3
1983 32.1 37.3 36.4 40.7 52.0 63.1 73.6 78.0 60.8 49.4 34.9 8.1 47.2
1984 28.0 36.1 34.3 43.8 53.6 62.8 72.2 74.8 57.2 47.2 37.5 21.4 47.4
1985 21.6 23.8 35.9 52.0 61.8 62.1 74.6 69.0 55.6 47.3 16.0 21.0 45.1
1986 29.8 21.5 43.0 44.2 54.9 67.6 70.9 69.6 55.0 48.7 30.6 30.5 47.2
1987 31.1 32.5 32.6 51.6 59.5 67.1 75.4 68.1 61.4 47.1 40.3 28.9 49.6
1988 21.7 26.9 35.6 47.1 60.0 75.6 76.1 72.5 60.4 49.7 36.4 28.4 49.2
1989 28.7 14.4 31.1 45.8 55.4 64.0 77.0 73.1 61.0 48.8 36.4 19.4 46.3
1990 32.4 28.9 36.4 45.0 53.2 66.6 71.7 73.8 65.9 48.2 40.5 17.8 48.4
1991 18.4 36.0 38.5 46.3 56.6 67.2 72.9 74.0 61.1 46.4 30.0 32.7 48.3
1992 33.6 36.3 40.9 47.1 57.4 62.6 64.3 65.9 62.6 49.3 32.4 19.0 47.6
1993 16.0 15.2 37.6 43.5 56.1 60.3 65.1 68.6 56.6 48.2 32.4 31.5 44.3
1994 22.4 19.8 40.5 46.0 60.2 68.5 70.7 73.3 65.5 49.7 35.5 30.3 48.5
1995 29.2 31.9 33.2 40.3 51.8 62.9 70.6 73.6 60.1 46.5 33.7 25.4 46.6
1996 14.9 27.3 26.2 43.3 50.6 65.5 70.8 73.2 59.8 24.3 17.9
1997 18.1 28.8 36.7 38.7 52.8 66.3 70.9 68.7 62.5 48.6 33.2 30.3 46.3
1998 24.3 34.9 28.0 46.2 56.2 58.7 72.7 72.3 67.1 47.8 36.9 26.8 47.7
1999 25.6 36.6 36.3 42.6 53.0 62.6 71.3 71.4 55.7 49.9 44.4 33.3 48.6
2000 26.2 33.2 38.7 43.1 56.0 62.5 73.6 74.4 63.4 49.8 27.0 16.7 47.1
2001 29.7 16.9 34.4 46.0 56.2 64.1 74.8 74.4 62.5 47.9 39.9 28.9 48.0
POR=102 YRS 23.0 25.7 33.5 44.9 55.1 64.5 72.2 70.8 60.8 48.7 35.6 26.2 46.8

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 Rapid City, South Dakota (RAP)

HEATING DEGREE DAYS (base 65 F) 2001 RAPID CITY, SD (RAP)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 74 43 193 649 1010 1436 1181 1008 847 659 350 83 7533
1973–74 16 0 246 416 972 1223 1329 905 840 530 343 87 6907
1974–75 1 42 242 407 849 1112 1274 1318 1151 728 343 119 7586
1975–76 3 16 206 493 929 1096 1269 878 940 535 295 98 6758
1976–77 3 6 132 606 991 1177 1616 846 877 459 165 17 6895
1977–78 1 48 163 494 944 1330 1669 1383 912 588 312 91 7935
1978–79 17 40 111 443 1068 1480 1781 1348 910 614 362 82 8256
1979–80 3 25 64 433 952 982 1359 1094 1032 483 251 54 6732
1980–81 1 18 144 510 763 1070 998 993 765 402 311 65 6040
1981–82 21 7 108 531 730 1209 1646 1146 985 682 358 170 7593
1982–83 7 21 226 545 962 1119 1012 772 880 723 407 113 6787
1983–84 8 0 208 474 896 1762 1139 832 948 626 366 101 7360
1984–85 0 0 268 546 820 1344 1341 1148 895 393 146 144 7045
1985–86 8 27 327 544 1466 1358 1083 1211 672 617 317 35 7665
1986–87 5 12 296 497 1025 1059 1045 907 997 408 199 46 6496
1987–88 10 49 147 545 736 1111 1340 1103 905 533 195 17 6691
1988–89 3 18 163 470 850 1127 1120 1414 1047 586 303 116 7217
1989–90 3 6 182 495 847 1410 1004 1004 880 597 363 68 6859
1990–91 10 5 112 514 730 1462 1440 807 815 556 269 16 6736
1991–92 2 6 183 581 1045 997 964 828 742 539 262 107 6256
1992–93 67 83 138 493 973 1418 1515 1390 841 636 269 158 7981
1993–94 56 26 256 522 972 1035 1312 1260 749 565 171 27 6951
1994–95 9 17 79 468 876 1068 1104 919 983 734 400 130 6787
1995–96 11 5 215 568 933 1221 1551 1087 1200 643 447 66 7947
1996–97 6 0 203 1215 1453 1446 1008 872 783 373 30
1997–98 23 26 127 510 947 1067 1254 837 1143 558 272 198 6962
1998–99 3 0 91 522 840 1178 1214 790 885 666 366 104 6659
1999–00 22 6 284 460 609 976 1196 914 808 652 281 139 6347
2000–01 10 1 152 462 1134 1490 1086 1339 944 565 278 127 7588
2001– 9 0 138 523 746 1111

2001 Rapid City, South Dakota (RAP)

COOLING DEGREE DAYS (base 65 F) 2001 RAPID CITY, SD (RAP)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 0 21 70 98 178 34 0 0 0 401
1973 0 0 0 0 7 80 202 295 15 0 0 0 599
1974 0 0 0 1 3 143 390 132 28 0 0 0 697
1975 0 0 0 0 9 41 314 188 19 12 0 0 583
1976 0 0 0 0 4 83 251 248 87 3 0 0 676
1977 0 0 0 0 25 143 270 85 51 0 0 0 574
1978 0 0 0 0 9 99 214 193 154 0 0 0 669
1979 0 0 0 4 15 99 179 141 110 2 0 0 550
1980 0 0 0 6 25 123 315 136 48 14 0 0 667
1981 0 0 0 3 5 67 243 170 74 0 0 0 562
1982 0 0 0 0 3 18 189 190 41 0 0 0 441
1983 0 0 0 0 9 62 282 407 88 0 0 0 848
1984 0 0 0 0 18 41 234 309 42 2 0 0 646
1985 0 0 0 10 53 64 312 158 51 0 0 0 648
1986 0 0 0 0 11 124 192 164 0 0 0 0 491
1987 0 0 0 13 33 118 341 152 45 0 0 0 702
1988 0 0 0 2 46 341 355 255 33 2 0 0 1034
1989 0 0 0 15 9 95 380 265 70 0 0 0 834
1990 0 0 0 2 4 120 226 282 147 3 0 0 784
1991 0 0 0 3 16 89 256 294 76 15 0 0 749
1992 0 0 0 9 36 41 51 118 72 11 0 0 338
1993 0 0 0 0 0 25 66 146 9 7 0 0 253
1994 0 0 0 0 28 141 193 280 97 0 0 0 739
1995 0 0 0 0 0 72 192 280 72 1 0 0 617
1996 0 0 0 0 5 86 194 262 52 0 0
1997 0 0 0 0 4 76 211 148 58 7 0 0 504
1998 0 0 0 0 8 15 250 232 160 0 0 0 665
1999 0 0 0 0 2 40 225 212 9 0 0 0 488
2000 0 0 0 0 10 71 282 299 108 0 0 0 770
2001 0 0 0 4 11 107 320 300 69 1 0 0 812

2001 Rapid City, South Dakota (RAP)

SNOWFALL (inches) 2001 RAPID CITY, SD (RAP)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0.0 0.0 0.0 0.7 3.6 6.0 2.0 3.1 16.9 1.9 0.0 0.0 34.2
1973–74 0.0 0.0 0.0 1.4 9.7 5.6 2.0 4.0 1.7 4.7 0.0 0.0 29.1
1974–75 0.0 0.0 0.0 T 1.5 1.4 13.7 6.1 27.4 1.3 0.0 0.0 51.4
1975–76 0.0 0.0 0.0 4.6 8.4 17.9 2.0 6.5 4.3 3.5 0.0 0.0 47.2
1976–77 0.0 0.0 0.0 0.5 7.0 6.1 11.1 2.6 26.0 3.4 0.0 0.0 56.7
1977–78 0.0 0.0 0.0 0.8 10.6 7.4 3.1 15.0 3.0 2.6 T 0.0 42.5
1978–79 0.0 0.0 0.0 T 9.8 4.0 6.1 4.4 2.6 1.8 2.8 0.0 31.5
1979–80 0.0 0.0 0.0 T 1.8 0.3 3.0 10.1 8.6 5.4 0.0 0.0 29.2
1980–81 0.0 0.0 0.0 1.4 6.9 6.1 1.2 1.3 T T 0.0 0.0 16.9
1981–82 0.0 0.0 0.0 1.6 1.2 3.8 6.2 5.0 11.5 5.5 0.0 0.0 34.8
1982–83 0.0 0.0 0.0 1.4 1.2 4.0 2.9 0.3 6.5 4.3 4.3 0.0 24.9
1983–84 0.0 0.0 0.3 0.9 6.9 7.1 1.9 2.5 6.1 22.1 0.2 0.0 48.0
1984–85 0.0 0.0 1.3 0.7 2.0 4.9 3.8 0.7 16.2 0.4 0.0 T 30.0
1985–86 0.0 0.0 1.4 0.6 33.6 10.2 5.7 10.7 6.0 12.7 0.0 0.0 80.9
1986–87 0.0 0.0 0.0 T 12.6 0.1 0.5 21.5 10.9 0.3 0.0 0.0 45.9
1987–88 0.0 0.0 0.0 1.7 T 4.7 2.7 3.6 10.6 6.1 0.0 0.0 29.4
1988–89 0.0 0.0 0.0 0.0 2.2 9.0 0.4 7.3 10.7 6.4 0.0 0.0 36.0
1989–90 0.0 T 0.0 3.9 4.6 10.9 3.1 5.0 9.2 3.0 0.5 T 40.2
1990–91 0.0 T 0.0 1.5 1.0 6.2 6.3 8.2 3.6 11.1 4.9 T 42.8
1991–92 T 0.0 T 4.0 6.7 0.8 5.2 1.2 8.2 3.5 0.0 0.0 29.6
1992–93 T 0.0 0.0 0.9 5.0 12.4 13.6 9.0 1.0 12.2 0.0 0.0 54.1
1993–94 T 0.0 T 2.4 11.4 5.5 7.5 11.1 5.6 12.8 0.0 T 56.3
1994–95 0.0 T 0.0 0.0 6.8 4.6 0.9 6.3 9.2 10.1 T T 37.9
1995–96 0.0 0.0 T 10.2 3.1 1.4 19.4 4.4 16.2 10.3 0.9 T 65.9
1996–97 0.0 0.0 T 0.0 T
1997–98 T T 0.0 3.1
1998–99 0.0 T 15.9 0.5 2.0 0.2 18.5 6.3 0.0 T
1999–00 0.0 0.0 0.0 T 0.3 3.7 2.9 1.5 5.5 19.0 0.0 0.0 32.9
2000–01 0.0 0.0 1.4 0.0 2.9 3.0 2.7
2001–
POR=55 YRS T T 0.1 1.7 5.2 4.9 5.0 6.2 8.9 6.4 0.8 0.1 39.3



User Contributions:

Comment about this article, ask questions, or add new information about this topic:

CAPTCHA


2001 Rapid City, South Dakota (RAP) forum