Historical Climate Data

Precipitation Summary

Station: 115792 MONTICELLO NO 2, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 2.04 1.93 3.12 3.78 4.41 3.97 4.57 4.15 2.79 2.72 3.34 2.86 39.68

Precipitation Extremes

Period of Record: 1964-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 5.25 1982 0.05 1986 2.12 01-29-1982
Feb 5.78 1990 0.38 1995 1.98 02-14-1990
Mar 7.74 1973 0.76 1987 1.66 03-28-1998
Apr 8.07 1994 0.83 1977 3.00 04-12-1979
May 11.37 1995 1.06 1992 4.38 05-15-1990
Jun 11.82 1974 0.40 1988 4.59 06-23-1974
Jul 13.40 1992 0.64 1997 5.00 07-05-1971
Aug 9.19 1977 0.79 1984 4.28 08-13-1999
Sep 7.85 1972 0.21 1979 4.37 09-17-1969
Oct 6.79 1983 0.47 1968 3.98 10-21-1983
Nov 9.66 1985 0.20 1976 2.40 11-18-1985
Dec 7.91 1971 0.34 1976 2.15 12-07-1966
             
Annual 54.93 1990 26.97 2001 5.00 07-05-1971
Winter 10.34 1968 2.65 1970 2.15 12-07-1966
Spring 18.69 1998 3.34 2001 4.38 05-15-1990
Summer 20.09 1981 4.94 1988 5.00 07-05-1971
Fall 17.03 1969 3.94 1999 4.37 09-17-1969

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 8.9 4.8 1.0 0.3
Feb 7.7 4.3 1.1 0.4
Mar 10.0 6.8 2.3 0.5
Apr 11.3 7.7 2.2 0.8
May 10.5 7.9 3.5 1.0
Jun 9.0 6.3 2.8 1.0
Jul 8.6 6.4 3.0 1.5
Aug 8.1 5.9 2.6 1.3
Sep 7.0 4.8 2.1 0.8
Oct 7.4 5.0 2.1 0.5
Nov 9.7 6.8 2.7 0.7
Dec 9.9 5.8 2.0 0.6
         
Annual 108.2 72.5 27.5 9.6
Winter 26.4 14.9 4.1 1.4
Spring 31.8 22.3 7.9 2.3
Summer 25.8 18.6 8.4 3.9
Fall 24.1 16.6 6.9 1.9

Temperature Summary

There are insufficient temperature data to produce the temperature summary.

Snowfall Summary

Station: 115792 MONTICELLO NO 2, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.9 4.8 3.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.5 22.7

Snowfall Extremes

Period of Record: 1964-2006

Month High (in) Year 1-Day Max (in) Date
Jan 26.0 1982 12.0 01-02-1999
Feb 14.0 1986 8.0 02-27-1984
Mar 13.0 1978 8.0 03-04-1965
Apr 3.5 1982 2.5 04-07-1982
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 0.0 - - -
Nov 9.0 1980 7.5 11-27-1980
Dec 23.5 1973 7.5 12-23-1981
Season (Jul-Jun) 59.0 1981-1982 12.0 01-02-1999

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 2.7 1.9 0.9 0.2
Feb 2.7 1.9 0.9 0.2
Mar 1.5 1.1 0.6 0.1
Apr 0.3 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 0.6 0.5 0.2 0.1
Dec 3.2 2.0 1.0 0.3
Annual 11.7 7.9 4.6 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