Historical Climate Data

Precipitation Summary

Station: 115935 MOUNT STERLING, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.58 1.59 2.79 3.64 5.03 3.85 3.90 3.24 3.42 3.18 3.07 2.29 37.58

Precipitation Extremes

Period of Record: 1942-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 6.21 1965 0.00 1983 2.70 01-01-1965
Feb 4.52 1998 0.05 2006 1.85 02-27-1998
Mar 7.99 1973 0.26 2002 2.53 03-21-1962
Apr 9.90 1983 0.71 1971 3.75 04-21-1973
May 13.12 1991 0.70 2006 4.17 05-05-1991
Jun 11.48 1947 0.11 1963 5.52 06-08-1962
Jul 13.62 1981 0.29 1988 4.25 07-22-1951
Aug 7.80 1970 0.34 1953 4.62 08-26-2004
Sep 11.24 1945 0.08 1956 3.10 09-01-2003
Oct 9.23 1991 0.14 1964 5.33 10-04-1991
Nov 10.46 1985 0.29 1999 2.77 11-18-1985
Dec 7.22 1982 0.00 2000 2.83 12-21-1949
             
Annual 56.11 1973 15.79 1953 5.52 06-08-1962
Winter 11.33 1950 1.46 1956 2.83 12-21-1949
Spring 19.88 1991 3.48 1971 4.17 05-05-1991
Summer 23.10 1993 3.50 1983 5.52 06-08-1962
Fall 18.28 1985 2.18 1999 5.33 10-04-1991

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 5.3 4.0 1.1 0.3
Feb 4.6 3.6 1.2 0.3
Mar 6.8 5.4 2.3 0.9
Apr 8.6 6.7 2.9 0.8
May 9.2 7.4 3.3 1.6
Jun 7.8 6.1 2.7 1.1
Jul 7.2 5.9 2.6 1.2
Aug 6.8 5.3 2.4 1.0
Sep 6.1 5.0 2.5 1.0
Oct 6.5 5.2 2.2 0.9
Nov 7.3 5.7 2.5 0.7
Dec 5.8 4.3 1.8 0.6
         
Annual 82.5 65.1 27.7 10.6
Winter 15.7 11.9 4.2 1.2
Spring 24.9 19.7 8.6 3.3
Summer 21.8 17.3 7.6 3.3
Fall 20.0 15.9 7.2 2.7

Temperature Summary

There are insufficient temperature data to produce the temperature summary.

Snowfall Summary

Station: 115935 MOUNT STERLING, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.0 4.5 1.5 0.5 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5 19.2

Snowfall Extremes

Period of Record: 1942-2006

Month High (in) Year 1-Day Max (in) Date
Jan 19.0 1979 11.2 01-26-1967
Feb 17.0 1986 9.0 02-24-1965
Mar 19.2 1960 9.2 03-16-1960
Apr 4.0 1980 4.0 04-14-1980
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 0.0 - - -
Nov 9.8 1975 7.3 11-26-1975
Dec 13.5 1977 8.1 12-15-1987
Season (Jul-Jun) 44.0 1951-1952 11.2 01-26-1967

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 2.1 1.7 1.1 0.2
Feb 2.1 1.7 1.1 0.2
Mar 0.7 0.6 0.3 0.1
Apr 0.2 0.2 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 0.8 0.4 0.2 0.1
Dec 2.2 1.8 1.1 0.2
Annual 7.8 6.6 4.0 0.9

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