Historical Climate Data

Precipitation Summary
Station: 476200 OCONOMOWOC 1 SW, WI

1971-2000 NCDC Normals

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
Precip (in) 1.32 1.20 1.96 3.25 3.14 3.97 4.21 4.52 3.69 2.63 2.30 1.71 33.90

Precipitation Extremes
Period of Record: 1896-2001

Month High (in) Year Low (in) Year 1-Day
Max (in)		 Date
JAN 3.46 1999 0.12 1948 1.20 01-19-1988
FEB 3.02 1997 0.09 1958 1.41 02-21-1997
MAR 4.30 1998 0.33 1968 2.53 03-31-1998
APR 7.14 1993 0.99 1962 2.37 04-23-1999
MAY 8.54 2000 0.69 1988 2.81 05-31-1958
JUN 9.53 1954 0.62 1995 2.94 06-26-1986
JUL 10.00 1952 0.83 1967 4.82 07-18-1952
AUG 11.39 1995 0.47 1969 5.38 08-10-1995
SEP 10.92 1986 0.44 1976 3.91 09-12-1991
OCT 7.51 1984 0.11 1952 2.82 10-31-1984
NOV 6.00 1985 0.39 1976 2.20 11-01-1982
DEC 3.84 1971 0.10 1960 1.64 12-15-1971
 
Annual 42.94 1986 18.12 1963 5.38 08-10-1995
Winter 6.34 1985 1.00 1961 1.64 12-15-1971
Spring 12.51 2000 3.39 1994 2.81 05-31-1958
Summer 19.36 1954 4.02 1948 5.38 08-10-1995
Fall 17.10 1985 2.74 1976 3.91 09-12-1991

Precipitation Threshold Climatology
Derived from 1971-2000 Averages


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

Month # Days
Total ≥ 0.01"		 # Days
Total ≥ 0.10"		 # Days
Total ≥ 0.50"		 # Days
Total ≥ 1.00"
JAN 9.5 4.3 0.4 0.0
FEB 7.5 3.4 0.6 0.1
MAR 9.6 5.2 1.0 0.2
APR 11.4 7.0 2.0 0.5
MAY 11.2 7.0 2.0 0.5
JUN 10.3 6.8 2.7 0.9
JUL 10.4 6.6 3.0 1.2
AUG 10.1 7.0 3.2 1.4
SEP 9.4 6.0 2.4 1.2
OCT 9.7 5.4 1.9 0.5
NOV 10.0 4.9 1.6 0.4
DEC 9.7 4.5 1.0 0.1
 
Annual 118.9 67.9 21.7 6.9
Winter 26.7 12.1 2.0 0.2
Spring 32.2 19.2 5.0 1.2
Summer 30.9 20.4 8.9 3.6
Fall 29.1 16.3 5.8 2.0