Historical Climate Data

Precipitation Summary

Station: 111420 CHANNAHON DRESDEN ISLAND, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.74 1.66 2.68 3.67 4.00 4.55 4.12 3.41 3.09 2.70 3.16 2.47 37.25

Precipitation Extremes

Period of Record: 1943-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 5.00 2005 0.09 1981 1.94 01-14-1995
Feb 5.10 1997 0.02 1987 2.67 02-21-1997
Mar 6.55 1944 0.19 1958 2.68 03-16-1984
Apr 9.72 1950 0.63 1946 2.99 04-05-1947
May 8.46 1974 1.02 1992 2.70 05-20-1949
Jun 9.61 1999 0.27 1991 7.46 06-26-1978
Jul 8.66 1972 0.40 1991 4.75 07-13-1957
Aug 10.06 2004 0.22 1996 3.19 08-26-1972
Sep 16.64 1961 0.04 1979 4.48 09-24-1961
Oct 10.06 1991 0.06 1964 2.81 10-11-1954
Nov 7.27 1985 0.43 1999 2.52 11-28-1990
Dec 7.57 1982 0.28 1943 3.40 12-03-1982
             
Annual 50.54 1972 21.03 1963 7.46 06-26-1978
Winter 13.51 1950 1.74 1961 3.40 12-03-1982
Spring 17.02 1983 3.17 1958 2.99 04-05-1947
Summer 23.69 1972 3.01 1991 7.46 06-26-1978
Fall 21.44 1961 2.58 1956 4.48 09-24-1961

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 11.6 4.7 0.9 0.3
Feb 9.5 4.2 0.8 0.1
Mar 11.5 6.3 1.6 0.5
Apr 11.7 6.9 2.6 1.0
May 11.3 7.5 2.9 0.9
Jun 9.8 6.7 3.3 1.2
Jul 9.1 6.2 2.6 1.1
Aug 8.6 5.9 2.3 1.0
Sep 8.7 5.1 1.9 0.8
Oct 8.7 5.1 1.9 0.6
Nov 10.6 6.4 2.0 0.7
Dec 12.1 5.3 1.5 0.4
         
Annual 122.8 70.3 24.2 8.6
Winter 33.1 14.2 3.2 0.8
Spring 34.4 20.7 7.1 2.4
Summer 27.5 18.8 8.2 3.3
Fall 27.9 16.5 5.7 2.1

Temperature Summary

There are insufficient temperature data to produce the temperature summary.

Snowfall Summary

Station: 111420 CHANNAHON DRESDEN ISLAND, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 6.7 4.8 1.7 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.7 4.3 18.6

Snowfall Extremes

Period of Record: 1943-2006

Month High (in) Year 1-Day Max (in) Date
Jan 36.0 1979 17.0 01-27-1967
Feb 16.0 1980 7.0 02-09-1970
Mar 15.1 1970 12.0 03-26-1970
Apr 10.5 1982 7.5 04-06-1982
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 2.5 1967 2.5 10-27-1967
Nov 8.0 1951 6.0 11-07-1951
Dec 22.5 1951 9.0 12-23-1961
Season (Jul-Jun) 68.7 1978-1979 17.0 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 3.0 1.9 1.1 0.2
Feb 3.0 1.9 1.1 0.2
Mar 1.0 0.9 0.4 0.0
Apr 0.1 0.1 0.1 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 0.0 0.0 0.0 0.0
Nov 0.4 0.3 0.2 0.0
Dec 2.9 1.7 1.0 0.1
Annual 9.5 6.1 3.5 0.6

Growing Season Summary

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

Back to the Station List

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