Historical Climate Data

Temperature Summary
Station: 476646 PLATTEVILLE, WI

1971-2000 NCDC Normals

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
Max °F 24.9 31.0 43.3 57.7 69.4 79.0 82.6 80.4 72.5 60.8 43.4 30.1 56.3
Min °F 7.3 12.7 23.7 34.9 46.0 55.9 60.8 59.2 50.0 38.9 26.2 14.1 35.8
Mean °F 16.1 21.9 33.5 46.3 57.7 67.5 71.7 69.8 61.3 49.9 34.8 22.1 46.1
HDD
base 65		 1516 1208 976 563 262 48 12 34 151 471 907 1330 7478
CDD
base 65		 0 0 0 2 36 122 220 184 37 2 0 0 603

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 28.9 1990 4.5 1977 58 01-31-1989 -30 01-30-1951
FEB 34.9 1954 12.2 1979 66 02-26-2000 -32 02-03-1996
MAR 42.6 1973 22.5 1960 85 03-29-1986 -27 03-01-1962
APR 54.7 1977 41.5 1975 94 04-22-1980 3 04-07-1982
MAY 66.5 1977 51.2 1997 93 05-30-1953 26 05-01-1978
JUN 73.0 1971 62.6 1969 101 06-20-1988 36 06-03-1985
JUL 78.8 1955 66.3 1992 102 07-27-1955 42 07-29-1952
AUG 76.5 1983 64.9 1992 103 08-17-1988 38 08-20-1950
SEP 67.0 1948 55.5 1993 100 09-01-1953 25 09-24-1950
OCT 60.4 1963 45.0 1988 91 10-02-1953 12 10-26-1962
NOV 45.9 2001 26.5 1959 80 11-01-1950 -14 11-26-1977
DEC 31.7 1959 9.8 2000 64 12-06-1998 -26 12-19-1983
 
Annual 50.9 1987 43.2 1996 103 08-17-1988 -32 02-03-1996
Winter 28.7 1998 12.8 1979 66 02-26-1900 -32 02-03-1996
Spring 54.4 1977 40.6 1996 94 04-22-1980 -27 03-01-1962
Summer 75.3 1988 65.5 1992 103 08-17-1988 36 06-03-1985
Fall 54.5 1963 45.2 1995 100 09-01-1953 -14 11-26-1977

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 21.4 30.5 9.8
FEB 0.0 13.8 26.3 5.2
MAR 0.0 5.1 23.7 1.0
APR 0.0 0.3 11.1 0.0
MAY 0.2 0.0 1.4 0.0
JUN 2.0 0.0 0.0 0.0
JUL 5.0 0.0 0.0 0.0
AUG 2.4 0.0 0.0 0.0
SEP 0.8 0.0 1.0 0.0
OCT 0.0 0.0 7.9 0.0
NOV 0.0 4.5 21.4 0.3
DEC 0.0 15.8 29.4 5.1
 
Annual 10.3 61.0 153.2 21.5
Winter 0.0 50.9 86.2 20.1
Spring 0.2 5.4 36.2 1.0
Summer 9.4 0.0 0.0 0.0
Fall 0.8 4.5 30.3 0.3