Historical Climate Data

Precipitation Summary

Station: 116725 PEOTONE, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.57 1.45 2.66 3.99 4.68 5.12 4.15 3.66 3.38 3.36 3.65 2.55 40.22

Precipitation Extremes

Period of Record: 1940-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 5.03 1965 0.09 1986 2.60 01-27-1967
Feb 5.12 1997 0.00 1987 2.30 02-06-1942
Mar 6.72 1944 0.56 1958 2.47 03-25-1954
Apr 11.02 1981 0.69 1971 3.84 04-14-1981
May 12.22 1974 0.92 1950 5.29 05-19-1987
Jun 11.95 1993 0.28 1991 7.92 06-13-1972
Jul 10.84 1996 0.56 1946 9.56 07-13-1957
Aug 10.65 2001 0.34 1996 3.51 08-17-1968
Sep 8.73 1961 0.16 1940 4.10 09-01-1989
Oct 11.27 1941 0.19 1964 3.50 10-10-1954
Nov 10.48 1990 0.65 1999 4.79 11-27-1990
Dec 6.61 1982 0.27 1995 3.89 12-03-1982
             
Annual 59.51 1993 22.43 1963 9.56 07-13-1957
Winter 13.42 1950 1.29 1977 3.89 12-03-1982
Spring 19.75 1974 3.48 1992 5.29 05-19-1987
Summer 24.27 1972 4.79 1991 9.56 07-13-1957
Fall 19.38 1990 2.89 1956 4.79 11-27-1990

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 7.5 3.7 1.0 0.3
Feb 6.8 3.4 0.8 0.2
Mar 9.2 6.4 1.7 0.4
Apr 10.5 7.3 2.5 1.0
May 9.0 6.9 3.4 1.3
Jun 9.1 7.2 3.2 1.6
Jul 7.6 5.9 2.8 1.2
Aug 7.6 5.6 2.3 1.1
Sep 7.3 5.6 2.5 1.0
Oct 7.9 5.9 2.3 0.9
Nov 9.2 6.6 2.1 0.9
Dec 8.8 5.4 1.3 0.5
         
Annual 100.7 70.0 25.8 10.4
Winter 23.1 12.6 3.0 1.0
Spring 28.8 20.6 7.6 2.7
Summer 24.3 18.7 8.3 3.9
Fall 24.5 18.1 6.9 2.8

Temperature Summary

There are insufficient temperature data to produce the temperature summary.

Snowfall Summary

Station: 116725 PEOTONE, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 9.4 7.3 3.9 1.1 0.0 0.0 0.0 0.0 0.0 0.3 1.8 6.9 30.7

Snowfall Extremes

Period of Record: 1940-2006

Month High (in) Year 1-Day Max (in) Date
Jan 39.6 1979 26.0 01-27-1967
Feb 19.4 1994 7.0 02-26-1994
Mar 15.9 1970 12.0 03-26-1970
Apr 13.0 1982 11.0 04-06-1982
May 0.5 1997 0.5 05-01-1997
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 6.0 2000 6.0 10-08-2000
Nov 11.5 1951 5.5 11-28-1977
Dec 28.0 2000 12.0 12-08-1950
Season (Jul-Jun) 65.0 1978-1979 26.0 01-27-1967

Snowfall Threshold Climatology

Derived from 1971-2000 Averages

*Annual values may differ from the sum of the monthly values due to rounding.


Month 		# Days
Total ≥ 0.1" 		# Days
Total ≥ 1.0" 		# Days
Total ≥ 2.0" 		# Days
Total ≥ 5.0"
Jan 4.1 2.7 1.7 0.2
Feb 4.1 2.7 1.7 0.2
Mar 1.8 1.2 0.9 0.2
Apr 0.5 0.4 0.2 0.0
May 0.0 0.0 0.0 0.0
Jun 0.0 0.0 0.0 0.0
Jul 0.0 0.0 0.0 0.0
Aug 0.0 0.0 0.0 0.0
Sep 0.0 0.0 0.0 0.0
Oct 0.1 0.1 0.1 0.0
Nov 1.2 0.7 0.4 0.1
Dec 3.7 2.4 1.4 0.2
Annual 16.3 10.6 6.5 1.2

Growing Season Summary

There are insufficient temperature data to produce the growing season summary.

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Copyright 2007 Illinois State Water Survey
Jim Angel, State Climatologist, jimangel@illinois.edu
Last Modified: September 11, 2007