Historical Climate Data

Temperature Summary
Station: 472869 FORT ATKINSON 2 SSE, WI

1971-2000 NCDC Normals

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
Max °F 25.9 31.2 43.0 56.8 69.5 79.3 83.0 80.4 72.7 60.8 44.6 31.2 56.5
Min °F 7.5 12.7 24.2 35.6 46.2 55.9 60.5 58.0 48.9 38.0 27.2 14.7 35.8
Mean °F 16.7 22.0 33.6 46.2 57.9 67.6 71.8 69.2 60.8 49.4 35.9 23.0 46.2
HDD
base 65		 1498 1206 974 565 261 45 8 38 159 489 873 1303 7419
CDD
base 65		 0 0 0 1 40 122 218 168 33 6 0 0 588

Temperature Extremes
Period of Record: 1948-2001

Month High
Mean°F		 Year Low
Mean°F		 Year 1-Day
Max°F		 Date 1-Day
Min°F		 Date
JAN 28.3 1990 2.9 1977 58 01-25-1967 -33 01-30-1951
FEB 34.4 1998 10.3 1979 67 02-12-1999 -39 02-03-1996
MAR 43.0 1973 20.4 1960 83 03-30-1986 -21 03-01-1962
APR 53.8 1955 39.8 1950 90 04-23-1980 -4 04-06-1979
MAY 66.1 1977 51.5 1997 93 05-28-1978 25 05-09-1966
JUN 72.9 1971 62.1 1982 101 06-21-1988 35 06-11-1972
JUL 77.8 1955 67.1 1992 102 07-16-1988 39 07-06-1965
AUG 76.0 1955 64.6 1986 102 08-02-1988 37 08-28-1986
SEP 67.6 1971 56.2 1993 98 09-01-1953 28 09-22-1974
OCT 60.9 1963 42.7 1987 88 10-01-1971 11 10-30-1988
NOV 46.3 2001 28.2 1995 78 11-09-1999 -10 11-25-1950
DEC 32.5 1965 10.6 1983 67 12-06-2001 -29 12-25-1983
 
Annual 50.6 1998 44.0 1996 102 07-16-1988 -39 02-03-1996
Winter 29.1 1998 11.8 1977 67 12-06-1901 -39 02-03-1996
Spring 53.4 1977 41.2 1996 93 05-28-1978 -21 03-01-1962
Summer 73.4 1995 65.6 1992 102 07-16-1988 35 06-11-1972
Fall 55.5 1971 43.4 1976 98 09-01-1953 -10 11-25-1950

Temperature Threshold Climatology
Derived from 1971-2000 Averages


*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding.

Month # Days
Max ≥ 90°F		 # Days
Max ≤ 32°F		 # Days
Min ≤ 32°F		 # Days
Min ≤ 0°F
JAN 0.0 20.9 30.4 10.2
FEB 0.0 14.2 26.7 6.1
MAR 0.0 5.0 24.1 0.9
APR 0.0 0.3 10.8 0.0
MAY 0.6 0.0 1.3 0.0
JUN 3.3 0.0 0.0 0.0
JUL 5.5 0.0 0.0 0.0
AUG 2.7 0.0 0.0 0.0
SEP 0.9 0.0 1.0 0.0
OCT 0.0 0.0 8.7 0.0
NOV 0.0 3.9 21.0 0.3
DEC 0.0 15.0 29.0 5.4
 
Annual 13.2 58.5 152.3 22.6
Winter 0.0 50.2 86.1 21.6
Spring 0.6 5.3 36.1 0.9
Summer 11.5 0.0 0.0 0.0
Fall 0.9 3.9 31.0 0.3