2001 COLUMBUS, OHIO (CMH)



Columbus is located in the center of the state and in the drainage area of the Ohio River. The airport is located at the eastern boundary of the city approximately 7 miles from the center of the business district.

Four nearly parallel streams run through or adjacent to the city. The Scioto River is the principal stream and flows from the northwest into the center of the city and then flows straight south toward the Ohio River. The Olentangy River runs almost due south and empties into the Scioto just west of the business district. Two minor streams run through portions of Columbus or skirt the eastern and southern fringes of the area. They are Alum Creek and Big Walnut Creek. Alum Creek empties into the Big Walnut southeast of the city and the Big Walnut empties into the Scioto a few miles downstream. The Scioto and Olentangy are gorge–like in character with very little flood plain and the two creeks have only a little more flood plain or bottomland.

The narrow valleys associated with the streams flowing through the city supply the only variation in the micro–climate of the area. The city proper shows the typical metropolitan effect with shrubs and flowers blossoming earlier than in the immediate surroundings and in retarding light frost on clear quiet nights. Many small areas to the southeast and to the north and northeast show marked effects of air drainage as evidenced by the frequent formation of shallow ground fog at daybreak during the summer and fall months and the higher frequency of frost in the spring and fall.

The average occurrence of the last freezing temperature in the spring within the city proper is mid–April, and the first freeze in the fall is very late October, but in the immediate surroundings there is much variation. For example, at Valley Crossing located at the southeastern outskirts of the city, the average occurrence of the last 32 degree temperature in the spring is very early May, while the first 32 degree temperature in the fall is mid–October.

The records show a high frequency of calm or very low wind speeds during the late evening and early morning hours, from June through September. The rolling landscape is conducive to air drainage and from the Weather Service location at the airport the air drainage is toward the northwest with the wind direction indicated as southeast. Air drainage takes place at speeds generally 4 mph or less and frequently provides the only perceptible breeze during the night.

Columbus is located in the area of changeable weather. Air masses from central and northwest Canada frequently invade this region. Air from the Gulf of Mexico often reachs central Ohio during the summer and to a much lesser extent in the fall and winter. There are also occasional weather changes brought about by cool outbreaks from the Hudson Bay region of Canada, especially during the spring months. At infrequent intervals the general circulation will bring showers or snow to Columbus from the Atlantic. Although Columbus does not have a wet or dry season as such, the month of October usually has the least amount of precipitation.

NORMALS, MEANS, AND EXTREMES

COLUMBUS, OH (CMH)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 14821

39 59′ 29″ N  82 52′ 51″ W  GRND:  846  BARO: � A0;849  EASTERN (UTC + 5)

2001 Columbus, Ohio (CMH)

ELEMENT PRO JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 34.1 38.0 50.5 62.0 72.3 80.4 83.7 82.1 76.2 64.5 51.4 39.2 61.2
MEAN DAILY MAXIMUM 54 35.9 39.9 49.9 62.5 72.9 81.7 85.0 83.4 76.9 65.3 51.5 39.9 62.1
HIGHEST DAILY MAXIMUM 62 74 75 85 89 94 102 100 101 100 90 80 76 102
YEAR OF OCCURRENCE 1950 2000 1945 1948 1941 1944 1999 1983 1951 1951 1987 1982 JUN 1944
MEAN OF EXTREME MAXS. 54 58.1 62.3 73.9 81.9 87.5 92.9 94.3 92.9 89.9 81.8 71.4 61.8 79.1
NORMAL DAILY MINIMUM 30 18.5 21.2 31.2 40.0 50.1 58.0 62.7 60.8 54.8 42.9 34.3 24.6 41.6
MEAN DAILY MINIMUM 54 20.3 22.9 30.7 40.5 50.5 59.5 63.8 62.0 54.6 43.2 34.1 25.0 42.3
LOWEST DAILY MINIMUM 62 -22 -13 -6 14 25 35 43 39 31 20 5 -17 -22
YEAR OF OCCURRENCE 1994 1977 1984 1982 1966 1972 1972 1965 1963 1962 1976 1989 JAN 1994
MEAN OF EXTREME MINS. 54 -1.5 3.0 12.8 24.8 35.5 45.5 51.6 49.6 38.1 27.9 17.8 4.8 25.8
NORMAL DRY BULB 30 26.4 29.6 40.9 51.0 61.2 69.2 73.2 71.5 65.5 53.7 42.9 31.9 51.4
MEAN DRY BULB 54 28.2 31.4 40.4 51.5 61.8 70.5 74.4 72.8 65.7 54.3 42.8 32.4 52.2
MEAN WET BULB 17 27.3 30.1 36.4 46.1 55.8 64.0 67.8 66.3 59.6 49.1 39.8 30.8 47.8
MEAN DEW POINT 17 22.2 24.4 29.4 39.2 50.3 59.2 63.4 62.4 55.2 43.8 34.4 26.2 42.5
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.0 0.0 0.5 3.5 5.9 3.4 1.2 0.0 0.0 0.0 14.5
MAXIMUM 32 30 13.6 9.4 2.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.1 8.9 35.5
MINIMUM 32 30 27.2 23.5 18.3 6.9 0.7 0.0 0.0 0.0 0.1 4.1 13.6 23.9 118.3
MINIMUM 0 30 3.0 1.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 5.6
H/C NORMAL HEATING DEG. DAYS 30 1197 991 747 420 187 23 0 12 81 361 663 1026 5708
NORMAL COOLING DEG. DAYS 30 0 0 0 0 69 149 258 214 96 11 0 0 797
RH NORMAL (PERCENT) 30 71 70 64 62 66 68 71 73 73 69 72 74 69
HOUR 01 LST 30 74 73 70 70 77 80 82 84 83 78 76 77 77
HOUR 07 LST 30 76 76 74 75 79 81 84 87 87 82 80 79 80
HOUR 13 LST 30 67 64 56 52 54 55 56 58 58 55 63 69 59
HOUR 19 LST 30 69 66 60 54 56 58 60 63 65 64 69 73 63
S PERCENT POSSIBLE SUNSHINE 45 36 42 44 50 56 60 60 60 61 56 37 31 49
W/O MEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI) 52 1.9 1.6 1.1 0.6 0.9 0.9 1.1 1.6 1.7 1.4 1.2 1.6 15.6
THUNDERSTORMS 62 0.4 0.6 2.0 4.1 6.3 8.0 8.0 6.1 3.0 1.3 1.0 0.3 41.1
CLOUDINESS MEAN:
SUNRISE-SUNSET (OKTAS) 47 6.2 6.1 5.9 5.6 5.3 5.0 4.8 4.6 4.5 4.5 5.8 6.2 5.4
MIDNIGHT-MIDNIGHT (OKTAS) 32 6.0 5.5 5.5 5.1 4.8 4.7 4.4 4.3 4.3 4.3 5.6 6.0 5.0
MEAN NO. DAYS WITH:
CLEAR 1 2.0
PARTLY CLOUDY 1 6.0
CLOUDY 1 23.0
PR MEAN STATION PRESSURE(IN) 28 29.20 29.19 29.10 29.10 29.10 29.10 29.10 29.20 29.19 29.20 29.20 29.19 29.16
MEAN SEA-LEVEL PRES. (IN) 17 30.12 30.11 30.06 29.98 29.99 29.97 30.02 30.05 30.06 30.11 30.12 30.14 30.06
WINDS MEAN SPEED (MPH) 42 9.7 9.4 10.0 9.5 8.0 6.9 6.3 5.8 6.3 7.2 8.9 9.1 8.1
PREVAIL. DIR (TENS OF DEGS) 27 27 27 28 36 18 19 18 36 36 18 18 18 18
MAXIMUM 2-MINUTE:
SPEED (MPH) 6 40 41 43 47 47 36 47 43 44 40 45 47 47
DIR. (TENS OF DEGS) 24 24 21 26 26 22 33 29 23 24 27 22 22
YEAR OF OCCURRENCE 2000 2001 1996 1996 2001 2000 1997 1996 1999 1996 1996 2001 DEC 2001
MAXIMUM 5-SECOND:
SPEED (MPH) 6 52 53 51 58 55 52 60 56 61 52 56 59 61
DIR. (TENS OF DEGS) 24 18 23 26 26 23 28 29 23 25 25 26 23
YEAR OF OCCURRENCE 2000 1997 1996 1996 2001 1996 1997 1996 1999 2001 1998 2000 SEP 1999
PRECIPITATION NORMAL (IN) 30 2.18 2.24 3.27 3.21 3.93 4.04 4.31 3.72 2.96 2.15 3.22 2.86 38.09
MAXIMUM MONTHLY (IN) 62 8.29 5.15 9.59 6.51 9.11 9.75 12.36 8.63 6.76 5.24 10.67 6.98 12.36
YEAR OF OCCURRENCE 1950 1990 1964 1998 1968 1958 1992 1979 1979 1954 1985 1990 JUL 1992
MINIMUM MONTHLY (IN) 62 0.53 0.29 0.61 0.67 0.95 0.65 0.48 0.58 0.51 0.11 0.60 0.46 0.11
YEAR OF OCCURRENCE 1944 1978 1941 1971 1977 1999 1940 1951 1963 1963 1976 1955 OCT 1963
MAXIMUM IN 24 HOURS (IN) 54 4.81 2.15 3.40 2.37 2.72 2.93 5.16 3.79 4.86 2.21 2.47 2.56 5.16
YEAR OF OCCURRENCE 1959 1975 1964 1957 1968 1958 1992 1972 1979 1986 1985 1998 JUL 1992
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 12.8 11.1 13.8 12.4 12.3 10.5 10.9 10.0 8.4 9.3 11.7 13.5 136.7
PRECIPITATION 1.00 30 0.2 0.3 0.3 0.6 0.8 1.1 1.1 1.0 0.7 0.3 0.7 0.3 7.4
SNOWFALL NORMAL (IN) 30 9.2 7.0 4.4 1.1 0.* 0.0 0.0 0.0 T 0.1 1.9 5.3 29.0
MAXIMUM MONTHLY (IN) 53 34.4 16.4 13.5 12.6 0.8 T T 0.0 T 4.6 15.2 17.3 34.4
YEAR OF OCCURRENCE 1978 1979 1962 1987 1989 1995 1995 1994 1993 1950 1960 JAN 1978
MAXIMUM IN 24 HOURS (IN) 53 8.8 8.9 8.6 12.3 0.8 T T 0.0 T 4.6 8.2 8.7 12.3
YEAR OF OCCURRENCE 1996 1971 1962 1987 1989 1995 1995 1994 1993 1950 1960 APR 1987
MAXIMUM SNOW DEPTH (IN) 52 17 13 9 10 0 0 0 0 0 0 13 10 17
YEAR OF OCCURRENCE 1978 1979 1984 1987 1950 1960 JAN 1978
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 3.0 2.4 1.4 0.2 0.0 0.0 0.0 0.0 0.0 0.* 0.6 1.9 9.5

2001 Columbus, Ohio (CMH)

PRECIPITATION (inches) 2001 COLUMBUS, OH (CMH)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 1.40 1.74 2.86 3.74 6.56 3.98 2.60 7.96 5.13 1.74 4.40 3.49 45.60
1973 2.46 1.29 3.43 3.72 3.36 8.77 4.07 4.97 2.82 3.29 5.37 2.70 46.25
1974 2.40 2.30 4.38 2.66 3.29 5.04 1.14 4.88 3.32 1.51 3.39 2.68 36.99
1975 3.21 3.47 4.10 2.71 3.17 3.53 2.04 4.51 5.46 2.29 1.54 3.01 39.04
1976 3.15 2.03 2.17 1.44 1.41 4.52 5.12 5.08 2.54 2.86 0.60 0.93 31.85
1977 1.57 1.02 3.88 4.04 0.95 4.02 2.52 4.76 3.48 2.57 3.77 3.54 36.12
1978 5.89 0.29 2.98 3.02 4.15 3.65 1.81 5.23 1.16 2.39 1.56 5.01 37.14
1979 3.32 2.88 1.01 4.01 3.27 4.23 8.06 8.63 6.76 1.26 3.91 1.83 49.17
1980 1.69 1.38 3.77 1.59 4.56 5.17 4.58 6.26 1.86 2.53 2.07 1.96 37.42
1981 0.70 4.60 1.11 5.38 6.50 5.73 4.14 1.41 2.28 1.40 1.65 2.88 37.78
1982 4.77 1.49 3.99 1.90 4.68 3.37 3.90 1.02 4.25 0.92 5.19 3.84 39.32
1983 1.20 0.74 1.69 5.58 5.06 4.59 2.80 2.23 1.91 4.45 5.00 3.16 38.41
1984 1.07 1.97 3.89 3.10 4.93 0.71 3.15 2.96 1.48 2.91 4.41 2.84 33.42
1985 1.31 1.67 3.78 0.73 4.96 1.41 6.88 2.34 1.18 1.93 10.67 1.81 38.67
1986 1.54 2.96 2.61 1.31 2.47 5.53 3.60 1.61 3.44 4.16 3.00 2.81 35.04
1987 1.14 0.59 2.04 2.02 2.85 3.60 3.89 2.96 1.53 1.57 1.63 2.88 26.70
1988 2.14 4.26 2.54 2.24 2.27 1.34 7.80 2.68 3.52 1.70 3.59 2.49 36.57
1989 1.97 3.10 4.16 3.30 4.69 6.36 6.79 4.30 2.16 2.49 2.65 1.79 43.76
1990 2.43 5.15 1.32 2.82 7.01 5.25 8.00 1.86 5.26 5.05 2.03 6.98 53.16
1991 1.97 2.30 3.97 4.15 2.47 2.81 2.14 2.02 4.05 1.76 1.31 3.79 32.74
1992 1.79 0.85 3.40 2.83 3.40 2.33 12.36 3.75 2.14 1.40 4.03 1.32 39.60
1993 4.14 1.82 3.50 4.49 2.47 3.33 5.95 0.74 1.75 3.05 4.45 2.16 37.85
1994 3.79 1.56 1.94 3.64 1.69 1.93 6.02 3.29 1.68 0.92 2.94 2.22 31.62
1995 4.54 1.64 1.61 3.17 4.86 5.30 6.99 7.56 1.15 4.04 2.47 1.97 45.30
1996 3.73 2.14 3.40 6.39 5.81 3.82 5.09 1.58 5.50 1.44 3.20 3.46 45.56
1997 2.19 1.50 3.96 1.65 5.58 6.62 2.91 5.76 1.36 1.58 2.92 2.13 38.16
1998 2.32 2.48 1.88 6.51 3.09 6.99 2.75 1.99 1.27 3.05 1.99 3.25 37.57
1999 2.87 2.77 1.88 4.65 1.80 0.65 3.02 2.40 1.91 1.00 1.95 2.69 27.59
2000 3.53 2.79 2.70 4.15 5.42 3.50 4.10 4.10 4.18 2.70 2.13 3.59 42.89
2001 1.31 1.37 1.03 3.39 7.03 2.30 4.66 4.14 1.60 3.32 3.69 3.01 36.85
POR=123 YRS 2.86 2.42 3.79 3.23 3.74 3.71 3.89 3.21 2.60 2.19 2.78 2.64 37.06

2001 Columbus, Ohio (CMH)

AVERAGE TEMPERATURE (F) 2001 COLUMBUS, OH (CMH)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 28.2 27.7 37.0 48.8 60.8 63.6 71.9 70.1 64.6 49.6 40.5 36.1 49.9
1973 31.2 31.4 50.4 51.1 59.5 72.6 74.3 74.2 68.9 58.6 45.1 33.7 54.3
1974 33.2 31.2 44.6 54.3 60.8 67.7 74.4 74.0 62.2 52.8 44.5 34.0 52.8
1975 32.5 33.4 37.3 46.7 66.6 72.4 75.1 77.3 62.7 54.7 47.5 33.5 53.3
1976 24.0 37.4 46.5 50.9 58.1 70.5 72.0 68.3 61.7 47.5 33.9 24.8 49.6
1977 11.4 26.5 45.6 54.8 66.8 67.5 76.2 72.0 68.2 52.0 45.1 29.5 51.3
1978 19.0 16.6 34.5 50.6 59.6 70.4 73.5 73.2 69.8 51.5 44.4 34.4 49.8
1979 21.4 19.3 44.3 50.1 60.5 69.6 71.8 71.9 65.1 53.3 43.6 35.1 50.5
1980 29.3 25.2 37.2 49.5 62.4 67.4 75.9 75.9 68.3 50.8 40.8 32.5 51.3
1981 23.3 34.0 40.2 55.8 59.5 70.9 71.9 70.4 62.3 51.1 40.9 30.6 50.9
1982 21.2 29.2 40.4 46.4 66.8 65.8 74.4 69.2 63.5 56.2 45.4 40.4 51.6
1983 29.9 34.0 43.3 48.4 57.6 69.4 76.7 76.2 67.1 54.5 44.0 24.8 52.2
1984 23.3 37.4 32.3 50.0 57.6 73.1 71.2 72.9 63.1 59.4 40.6 39.5 51.7
1985 21.7 26.0 43.7 56.3 62.6 66.9 72.7 71.2 66.6 57.3 48.2 26.0 51.6
1986 30.1 32.7 42.5 54.5 64.3 70.6 75.7 71.0 69.2 56.3 41.3 33.3 53.5
1987 29.9 34.9 44.3 52.1 66.0 72.7 76.6 74.3 66.9 49.1 47.6 35.7 54.2
1988 26.5 29.3 40.2 50.3 62.6 69.6 77.5 75.3 65.2 47.4 43.9 31.6 51.6
1989 36.6 28.7 42.0 48.2 57.2 68.8 73.9 71.2 65.2 54.2 42.1 19.8 50.7
1990 37.7 37.5 45.3 50.7 59.1 70.3 73.6 72.5 66.4 55.1 46.2 37.2 54.3
1991 29.7 35.7 43.9 56.1 70.9 75.0 77.6 75.0 66.2 55.9 41.0 36.4 55.3
1992 32.2 36.8 40.7 51.8 59.9 67.3 73.5 69.4 64.7 51.9 44.8 34.7 52.3
1993 34.3 27.8 38.6 50.3 62.2 69.8 76.2 75.7 64.9 53.0 43.5 32.9 52.4
1994 21.3 30.0 39.5 53.9 58.4 73.9 75.2 71.7 65.4 55.5 48.2 38.8 52.7
1995 29.4 27.9 43.6 50.8 60.9 72.9 76.0 78.4 64.2 56.1 37.7 28.8 52.2
1996 27.8 30.5 35.6 50.2 60.9 72.3 72.8 74.0 65.8 55.0 37.5 37.1 51.6
1997 28.1 36.3 42.7 48.4 56.6 70.2 74.2 70.3 65.1 55.2 40.1 34.7 51.8
1998 37.6 40.5 43.6 53.1 67.3 71.7 74.8 76.3 71.6 55.7 45.9 38.1 56.4
1999 31.1 37.1 37.5 55.0 64.8 74.5 80.2 73.1 67.9 55.3 47.5 34.6 54.9
2000 27.0 37.5 45.9 51.4 64.9 71.6 72.5 71.3 64.8 57.2 41.0 23.3 52.4
2001 28.7 35.3 38.1 56.8 63.6 71.1 74.3 75.2 64.4 55.8 49.6 38.4 54.3
POR=123 YRS 29.0 31.1 40.2 51.2 61.9 70.7 74.8 72.8 66.4 54.7 42.5 32.5 52.3

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 Columbus, Ohio (CMH)

HEATING DEGREE DAYS (base 65 F) 2001 COLUMBUS, OH (CMH)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 22 18 77 473 727 889 1041 934 444 427 184 0 5236
1973-74 0 3 35 219 589 963 977 940 628 332 178 31 4895
1974-75 0 0 130 374 609 954 999 878 850 542 73 18 5427
1975-76 0 0 110 321 520 973 1263 791 570 440 229 4 5221
1976-77 1 25 118 537 925 1241 1659 1071 601 324 91 64 6657
1977-78 1 17 36 394 594 1091 1420 1346 938 424 223 23 6507
1978-79 0 0 38 411 610 943 1346 1270 637 449 185 18 5907
1979-80 11 16 83 376 632 920 1099 1148 855 458 133 53 5784
1980-81 0 0 46 435 717 1000 1286 864 761 287 195 14 5605
1981-82 8 5 141 429 713 1061 1351 997 758 556 45 33 6097
1982-83 3 19 107 304 585 759 1081 863 669 493 239 30 5152
1983-84 6 0 83 325 626 1236 1284 796 1007 447 254 3 6067
1984-85 6 3 143 182 727 782 1339 1086 654 286 134 35 5377
1985-86 0 2 96 249 500 1202 1076 901 694 328 113 19 5180
1986-87 0 26 41 287 702 974 1083 838 637 393 103 9 5093
1987-88 0 4 53 489 521 900 1187 1029 762 433 119 49 5546
1988-89 3 7 57 547 624 1032 873 1009 711 499 274 28 5664
1989-90 0 11 90 345 680 1394 840 766 613 444 190 26 5399
1990-91 0 3 83 310 558 857 1089 817 649 282 42 0 4690
1991-92 0 0 105 296 714 878 1011 814 747 402 190 35 5192
1992-93 0 8 101 403 600 932 942 1034 811 434 130 51 5446
1993-94 0 1 84 366 637 989 1351 973 787 340 233 12 5773
1994-95 0 8 51 295 497 805 1098 1031 657 427 150 6 5025
1995-96 0 0 78 274 810 1112 1147 992 905 448 191 11 5968
1996-97 2 0 74 307 821 859 1136 798 687 494 264 15 5457
1997-98 0 10 63 346 741 933 843 679 681 352 38 41 4727
1998-99 0 0 22 292 567 829 1045 776 848 299 68 9 4755
1999-00 0 0 46 295 517 936 1172 789 586 403 84 21 4849
2000-01 1 3 104 256 717 1285 1117 822 826 289 92 24 5536
2001- 2 0 97 297 455 815

2001 Columbus, Ohio (CMH)

COOLING DEGREE DAYS (base 65 F) 2001 COLUMBUS, OH (CMH)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 1 24 67 245 183 71 0 0 0 591
1973 0 0 3 14 17 236 295 292 160 25 0 0 1042
1974 0 0 4 20 58 117 296 286 52 3 0 0 836
1975 0 0 0 1 130 248 320 389 48 10 1 0 1147
1976 0 0 3 23 23 174 223 135 25 2 0 0 608
1977 0 0 8 24 151 148 354 242 139 0 7 0 1073
1978 0 0 0 0 59 190 270 261 188 0 0 0 968
1979 0 0 0 7 54 163 230 239 93 22 0 0 808
1980 0 0 0 0 61 132 343 344 151 3 0 0 1034
1981 0 0 0 16 32 198 231 181 64 4 0 0 726
1982 0 0 0 4 111 66 301 154 67 39 7 4 753
1983 0 0 1 2 17 167 377 355 152 9 0 0 1080
1984 0 0 0 8 30 253 205 254 94 14 0 0 858
1985 0 0 2 32 64 97 245 201 152 19 2 0 814
1986 0 0 2 19 95 194 339 221 171 25 0 0 1066
1987 0 0 0 11 142 246 366 299 116 0 5 0 1185
1988 0 0 0 0 54 194 396 333 70 5 0 0 1052
1989 0 0 5 2 40 149 282 211 106 12 0 0 807
1990 0 0 11 21 13 191 273 244 133 9 3 0 898
1991 0 0 0 21 232 307 402 317 147 23 0 0 1449
1992 0 0 0 13 37 115 272 152 99 2 0 0 690
1993 0 0 0 0 48 204 352 343 89 2 0 0 1038
1994 0 0 0 15 39 286 322 224 71 8 0 0 965
1995 0 0 0 6 32 251 347 424 61 4 0 0 1125
1996 0 0 0 11 72 238 251 285 102 2 0 0 961
1997 0 0 0 0 10 181 291 182 73 48 0 0 785
1998 0 0 27 0 118 248 313 357 227 10 0 3 1303
1999 0 0 0 4 69 301 476 258 139 0 0 0 1247
2000 0 0 0 2 87 225 239 209 105 18 0 0 885
2001 0 0 0 50 56 215 299 324 85 19 0 0 1048

2001 Columbus, Ohio (CMH)

SNOWFALL (inches) 2001 COLUMBUS, OH (CMH)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972-73 0.0 0.0 0.0 T 6.3 2.8 4.4 1.8 2.1 7.1 0.0 0.0 24.5
1973-74 0.0 0.0 0.0 0.0 T 6.4 2.3 5.0 4.5 0.3 0.0 0.0 18.5
1974-75 0.0 0.0 0.0 T 0.3 7.4 8.1 3.7 2.6 T 0.0 0.0 22.1
1975-76 0.0 0.0 0.0 0.0 1.1 2.9 12.4 1.8 1.0 T 0.0 0.0 19.2
1976-77 0.0 0.0 0.0 T 3.1 4.6 18.1 6.7 0.3 0.1 0.0 0.0 32.9
1977-78 0.0 0.0 0.0 0.0 2.2 7.5 34.4 4.5 5.5 T 0.0 0.0 54.1
1978-79 0.0 0.0 0.0 T 1.3 1.8 17.3 16.4 0.8 0.3 0.0 0.0 37.9
1979-80 0.0 0.0 0.0 0.0 0.1 0.2 7.0 8.1 1.2 T 0.0 0.0 16.6
1980-81 0.0 0.0 0.0 T 8.0 7.3 7.8 3.7 3.3 0.0 0.0 0.0 30.1
1981-82 0.0 0.0 0.0 0.0 1.9 9.8 11.8 3.7 3.2 4.7 0.0 0.0 35.1
1982-83 0.0 0.0 0.0 0.0 T 1.5 2.6 4.5 2.8 0.1 0.0 0.0 11.5
1983-84 0.0 0.0 0.0 0.0 0.5 5.7 9.0 10.8 9.8 0.3 0.0 0.0 36.1
1984-85 0.0 0.0 0.0 0.0 0.9 7.3 21.9 12.5 T 0.8 0.0 0.0 43.4
1985-86 0.0 0.0 0.0 0.0 0.0 8.6 4.8 9.8 1.8 T 0.0 0.0 25.0
1986-87 0.0 0.0 0.0 0.0 0.4 0.4 2.7 1.2 5.9 12.6 0.0 0.0 23.2
1987-88 0.0 0.0 0.0 T 0.6 4.6 8.4 6.5 3.8 T 0.0 0.0 23.9
1988-89 0.0 0.0 0.0 T 0.8 5.9 0.6 3.9 6.6 0.1 0.8 0.0 18.7
1989-90 0.0 0.0 0.0 0.4 0.3 9.4 3.3 6.0 1.4 0.4 0.0 T 21.2
1990-91 0.0 0.0 0.0 0.0 0.0 3.7 3.4 4.5 4.0 T 0.0 0.0 15.6
1991-92 0.0 0.0 0.0 T 0.6 1.6 12.2 1.8 1.6 1.1 0.0 0.0 18.9
1992-93 0.0 0.0 0.0 T 3.0 2.4 1.5 14.6 8.9 0.2 0.0 0.0 30.6
1993-94 0.0 0.0 0.0 4.6 0.8 4.2 19.5 2.9 4.6 1.1 0.0 T 37.7
1994-95 T 0.0 T 0.0 0.0 0.3 12.6 5.3 2.5 T 0.0 T 20.7
1995-96 T 0.0 0.0 0.0 2.7 11.8 24.5 4.3 7.6 3.2 0.0
1996-97 1.9
1997-98 0.9 2.9 1.2 2.2 2.8 T 0.0 T
1998-99 0.0 0.0 0.0 0.0 0.0 2.8 20.6 7.3 9.8 0.0 0.0 0.0 40.5
1999-00 0.0 0.0 0.0 0.0 1.5 4.6 13.8 7.9 1.9 0.1 0.0 0.0 29.8
2000-01 T 0.0 0.0 0.0 1.3 13.4 6.3 3.4 1.1 0.8 T 0.0 26.3
2001- 0.0 0.0 0.0 T 0.0 1.7
POR=52 YRS T 0.0 T 0.1 2.2 5.4 8.7 5.9 4.3 1.0 0.1 T 27.7



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