Historical Climate Data

Precipitation Summary
Station: 470045 AFTON, WI

1971-2000 NCDC Normals

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
Precip (in) 1.35 1.09 1.89 3.47 3.44 4.08 3.18 4.34 3.56 2.25 2.31 1.82 32.78

Precipitation Extremes
Period of Record: 1987-2001

Month High (in) Year Low (in) Year 1-Day
Max (in)		 Date
JAN 2.64 1999 0.59 1989 1.08 01-19-1988
FEB 3.15 1997 0.13 1995 1.65 02-09-2001
MAR 3.94 1991 0.50 1999 1.61 03-31-1998
APR 7.42 1993 1.37 1994 2.67 04-20-1993
MAY 6.86 2000 1.00 1988 2.19 05-29-1996
JUN 9.32 1993 0.51 1992 3.14 06-01-2000
JUL 6.35 1992 1.34 1988 2.21 07-14-1992
AUG 7.89 1998 0.61 1996 3.25 08-05-1998
SEP 7.42 2001 1.37 1990 2.30 09-12-2000
OCT 7.51 2001 0.54 1993 2.80 10-24-2001
NOV 4.86 1992 0.65 1999 1.48 11-06-1994
DEC 3.91 1987 0.42 1989 1.32 12-26-1988
 
Annual 47.05 1998 21.60 1989 3.25 08-05-1998
Winter 6.62 2001 3.16 1995 1.65 02-09-2001
Spring 15.68 1998 3.47 1994 2.67 04-20-1993
Summer 17.87 1998 6.72 1988 3.25 08-05-1998
Fall 17.38 2001 4.03 1989 2.80 10-24-2001

Precipitation Threshold Climatology
Derived from 1987-2000 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 11.5 5.1 0.5 0.1
FEB 7.4 3.9 0.4 0.2
MAR 9.7 4.3 1.1 0.3
APR 12.6 6.6 2.6 0.6
MAY 12.2 7.0 2.4 1.0
JUN 11.1 6.9 2.8 1.5
JUL 11.2 6.1 2.4 0.8
AUG 10.3 6.0 2.9 1.0
SEP 10.6 5.4 2.1 1.0
OCT 9.8 4.6 1.4 0.4
NOV 10.5 5.1 1.4 0.4
DEC 10.2 4.4 0.6 0.2
 
Annual 127.0 65.4 20.6 7.4
Winter 29.2 13.4 1.5 0.5
Spring 34.5 18.0 6.1 1.9
Summer 32.5 19.0 8.1 3.2
Fall 30.8 15.1 5.0 1.8