Historical Climate Data

Precipitation Summary

Station: 118179 SPRINGFIELD CAPITAL AP, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.62 1.80 3.15 3.36 4.06 3.77 3.53 3.41 2.83 2.62 2.87 2.54 35.56

Precipitation Extremes

Period of Record: 1908-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 5.67 1949 0.04 1986 2.12 01-10-1975
Feb 4.89 1990 0.44 1941 2.37 02-22-1990
Mar 7.89 1973 0.63 1937 2.63 03-23-1936
Apr 9.91 1964 0.73 1971 4.45 04-11-1979
May 11.05 1943 0.52 1992 3.54 05-08-1996
Jun 9.22 1990 0.23 1959 4.48 06-10-1958
Jul 10.76 1981 0.89 1997 4.33 07-27-1981
Aug 8.37 1981 0.07 1943 4.40 08-02-1981
Sep 8.57 1986 0.00 1979 5.12 09-26-1959
Oct 13.92 1941 0.16 1964 4.76 10-04-1941
Nov 6.94 1985 0.25 1999 2.36 11-15-1964
Dec 8.94 1982 0.15 1955 4.70 12-02-1982
             
Annual 52.67 1990 21.95 1940 5.12 09-26-1959
Winter 12.21 1950 1.83 1963 4.70 12-02-1982
Spring 17.68 1944 5.23 1987 4.45 04-11-1979
Summer 24.93 1981 3.42 1936 4.48 06-10-1958
Fall 22.68 1941 3.32 1963 5.12 09-26-1959

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 9.1 4.3 0.8 0.2
Feb 8.5 4.0 1.0 0.3
Mar 11.4 6.7 2.1 0.8
Apr 11.4 6.8 2.1 0.7
May 11.0 7.0 2.7 1.0
Jun 9.6 6.3 2.2 0.9
Jul 8.6 5.5 2.2 1.0
Aug 8.3 5.2 2.3 0.9
Sep 8.0 5.1 1.8 0.8
Oct 8.3 5.1 1.8 0.6
Nov 9.8 6.0 1.9 0.5
Dec 9.9 5.3 1.5 0.6
         
Annual 113.9 67.2 22.5 8.1
Winter 27.5 13.6 3.3 1.1
Spring 33.7 20.4 6.9 2.4
Summer 26.6 17.0 6.7 2.8
Fall 26.1 16.3 5.5 1.8

Temperature Summary

Station 118179 SPRINGFIELD CAPITAL AP, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 33.1 38.9 51.1 63.4 74.4 83.3 86.5 84.5 78.5 66.6 50.9 38.0 62.4
Low °F 17.1 22.2 32.4 42.2 52.7 61.9 66.0 63.9 55.4 44.4 33.7 22.6 42.9
Mean °F 25.1 30.6 41.8 52.8 63.6 72.6 76.3 74.2 67.0 55.5 42.3 30.3 52.7
HDD 1239 979 726 376 126 14 1 4 77 319 674 1061 5596
CDD 0 0 2 17 84 249 358 291 140 23 1 0 1165

HDD - heating degree days (base 65F); CDD - cooling degree days (base 65F)

Temperature Extremes

Period of Record: 1879-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 39.0 2006 10.3 1977 71 01-24-1950 -21 01-17-1977
Feb 40.4 1998 16.7 1978 74 02-29-1972 -22 02-26-1963
Mar 48.3 1973 24.2 1960 87 03-31-1981 -12 03-05-1960
Apr 60.4 1981 46.2 1950 90 04-25-1986 19 04-06-1982
May 72.3 1962 57.7 1966 95 05-17-1962 28 05-10-1966
Jun 79.0 1971 68.1 1958 103 06-26-1954 39 06-01-2003
Jul 81.4 1980 72.1 1996 112 07-14-1954 48 07-14-1967
Aug 80.2 1995 68.6 1967 103 08-03-1964 43 08-13-1964
Sep 72.7 1960 61.0 1949 101 09-01-1984 32 09-30-1984
Oct 66.4 1963 49.4 1976 93 10-02-1953 17 10-29-1952
Nov 49.9 2001 34.6 1950 83 11-01-1950 -3 11-30-1964
Dec 38.8 1982 16.1 1983 74 12-03-1970 -21 12-23-1989
                 
Annual 55.4 1998 50.7 1950 112 07-14-1954 -22 02-26-1963
Winter 35.0 1998 19.9 1978 74 12-03-1970 -22 02-26-1963
Spring 59.5 1977 46.6 1960 95 05-17-1962 -12 03-05-1960
Summer 78.1 1983 70.4 2004 112 07-14-1954 39 06-01-1903
Fall 59.5 1963 49.7 1976 101 09-01-1984 -3 11-30-1964

Temperature Threshold Climatology

Derived from 1971-2000 Averages:

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


Month 		# Days
High ≥ 90°F 		# Days
High ≤ 32°F 		# Days
Low ≤ 32°F 		# Days
Low ≤ 0°F
Jan 0.0 14.2 27.6 4.1
Feb 0.0 8.5 21.9 2.5
Mar 0.0 2.1 15.9 0.1
Apr 0.0 0.0 4.3 0.0
May 1.4 0.0 0.0 0.0
Jun 6.7 0.0 0.0 0.0
Jul 10.7 0.0 0.0 0.0
Aug 6.9 0.0 0.0 0.0
Sep 3.2 0.0 0.1 0.0
Oct 0.1 0.0 3.7 0.0
Nov 0.0 1.3 14.4 0.0
Dec 0.0 8.4 24.8 1.8
         
Annual 29.0 34.7 113.1 8.6
Winter 0.0 31.1 74.4 8.4
Spring 1.5 2.2 20.2 0.1
Summer 24.2 0.0 0.0 0.0
Fall 3.2 1.3 18.4 0.0

Snowfall Summary

Station: 118179 SPRINGFIELD CAPITAL AP, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.4 5.8 3.5 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.6 6.0 25.0

Snowfall Extremes

Period of Record: 1908-2006

Month High (in) Year 1-Day Max (in) Date
Jan 21.1 1977 8.0 01-09-1987
Feb 16.0 1993 8.2 02-24-1965
Mar 20.3 1960 8.2 03-07-1978
Apr 7.3 1980 6.1 04-14-1980
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 0.3 1989 0.3 10-19-1989
Nov 9.2 1951 7.8 11-06-1951
Dec 22.7 1973 17.0 12-12-1972
Season (Jul-Jun) 52.1 1977-1978 17.0 12-12-1972

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 4.4 1.6 1.0 0.3
Feb 4.4 1.6 1.0 0.3
Mar 2.5 0.9 0.5 0.2
Apr 0.7 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 0.1 0.0 0.0 0.0
Nov 1.6 0.5 0.2 0.1
Dec 4.7 1.6 0.8 0.3
Annual 19.8 7.1 4.0 1.2

Growing Season Summary

Station: 118179 SPRINGFIELD CAPITAL AP, IL

Growing Degree Day Averages

Derived from 1971-2000 Data

Base Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
40 15 43 170 406 742 989 1136 1071 818 492 170 37 6067
45 5 18 97 277 587 839 981 916 668 350 98 15 4833
50 1 6 51 170 435 689 826 761 519 227 51 6 3730
55 0 1 25 92 294 539 671 606 376 132 23 2 2753
60 0 0 9 44 175 391 516 451 247 65 7 0 1902
50** 8 26 102 239 463 665 782 732 531 298 93 19 3947

**Modified Growing Degree Days: Base 50, Ceiling 86.

Growing Season Summary

Derived from 1971-2000 Averages

Date of Last Spring Occurrence Date of First Fall Occurrence
Temp °F Median Early 90% 10% Late Median Early 90% 10% Late
32 4/13 3/27 4/01 4/25 5/04 10/12 9/22 10/04 10/26 11/03
30 4/08 3/23 3/28 4/21 5/04 10/21 10/02 10/08 11/05 11/12
28 4/06 3/18 3/23 4/16 4/18 10/28 10/02 10/12 11/12 11/28
24 3/26 3/02 3/14 4/12 4/18 11/07 10/11 10/21 11/21 11/29
20 3/15 2/14 2/24 4/02 4/09 11/17 10/20 11/04 12/10 12/21
16 3/07 2/07 2/09 3/15 3/25 12/03 11/02 11/08 12/19 12/30

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 181 166 171 201 210
30 197 166 177 215 220
28 205 176 190 227 255
24 222 191 196 253 259
20 250 217 221 276 282
16 269 238 251 301 311

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