Historical Climate Data

Precipitation Summary

Station: 111280 CARLINVILLE, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.96 1.95 3.54 3.95 4.25 3.89 3.66 3.34 2.88 2.67 3.63 2.87 38.59

Precipitation Extremes

Period of Record: 1891-2006


Month

High (in)

Year

Low (in)

Year
1-Day
Max (in)

Date
Jan 7.26 2005 0.00 1895 2.93 01-10-1975
Feb 5.62 1951 0.11 1947 2.23 02-06-1942
Mar 8.72 1922 0.15 1910 3.97 03-14-1922
Apr 11.46 1994 0.44 2004 4.14 04-11-1979
May 10.90 1943 0.13 1934 2.77 05-24-1927
Jun 10.86 1945 0.11 1933 5.26 06-28-1957
Jul 11.59 1942 0.26 1936 6.22 07-08-1942
Aug 11.09 1915 0.05 1971 5.00 08-20-1915
Sep 12.26 1926 0.00 1897 3.96 09-19-1966
Oct 8.88 1941 0.21 1897 4.81 10-12-1969
Nov 8.91 1985 0.08 1904 4.08 11-01-1946
Dec 7.85 1990 0.13 1955 3.75 12-03-1982
             
Annual 58.14 1927 21.94 1976 6.22 07-08-1942
Winter 13.23 1950 1.68 1963 3.75 12-03-1982
Spring 22.89 1927 3.45 2005 4.14 04-11-1979
Summer 23.92 1942 3.19 1933 6.22 07-08-1942
Fall 21.42 1926 2.88 1956 4.81 10-12-1969


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 8.6 4.9 1.0 0.3
Feb 7.8 4.3 1.2 0.3
Mar 11.1 7.4 2.4 0.7
Apr 11.4 7.3 2.5 0.9
May 11.6 7.4 3.0 1.1
Jun 9.4 6.4 2.7 1.0
Jul 8.9 5.4 2.6 1.1
Aug 8.1 5.2 2.5 0.8
Sep 8.0 4.9 2.2 0.8
Oct 9.2 5.8 1.8 0.4
Nov 10.3 6.6 2.6 0.8
Dec 9.1 5.3 1.8 0.7
         
Annual 113.7 70.9 26.3 8.7
Winter 25.5 14.5 3.9 1.3
Spring 34.1 22.1 7.9 2.6
Summer 26.5 16.9 7.8 2.9
Fall 27.4 17.3 6.7 1.9


Temperature Summary

Station 111280 CARLINVILLE, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 34.9 41.2 52.9 65.1 75.0 83.5 87.3 85.6 79.1 67.7 52.2 39.6 63.7
Low °F 17.4 22.0 31.9 43.0 52.8 62.1 66.6 64.4 55.7 44.5 33.4 23.4 43.1
Mean °F 26.2 31.6 42.4 54.1 63.9 72.8 77.0 75.0 67.4 56.1 42.8 31.5 53.4
HDD 1204 936 701 340 130 8 0 7 60 292 667 1039 5384
CDD 0 0 0 12 95 242 370 317 132 16 0 0 1184

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


Temperature Extremes

Period of Record: 1893-2006


Month
High
Mean °F

Year
Low
Mean °F

Year
1-Day
Max °F

Date
1-Day
Min °F

Date
Jan 40.7 1933 13.5 1977 74 01-23-1909 -22 01-07-1912
Feb 42.5 1976 20.0 1978 82 02-24-1930 -23 02-13-1905
Mar 54.6 1910 28.5 1960 91 03-21-1907 -12 03-06-1960
Apr 62.2 1896 45.9 1907 92 04-10-1930 16 04-05-1920
May 71.9 1962 57.7 1924 99 05-30-1934 26 05-10-1966
Jun 80.2 1934 67.0 1928 106 06-19-1913 37 06-16-1917
Jul 85.6 1936 72.1 1924 113 07-24-1934 44 07-23-1947
Aug 84.2 1936 68.4 1915 110 08-04-1918 38 08-21-1950
Sep 75.6 1931 60.7 1918 105 09-01-1913 25 09-30-1899
Oct 66.2 1963 47.9 1917 95 10-02-1953 14 10-30-1925
Nov 53.1 1909 35.9 1996 84 11-01-1950 -4 11-30-1929
Dec 42.1 1931 19.2 1983 74 12-15-1948 -20 12-22-1989
                 
Annual 60.1 2004 51.3 1917 113 07-24-1934 -23 02-13-1905
Winter 40.3 1932 22.9 1978 82 02-24-1930 -23 02-13-1905
Spring 59.4 1977 48.7 1960 99 05-30-1934 -12 03-06-1960
Summer 81.3 1936 70.5 1915 113 07-24-1934 37 06-16-1917
Fall 63.1 1931 51.3 1976 105 09-01-1913 -4 11-30-1929


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 12.6 27.1 3.0
Feb 0.0 7.1 21.3 1.6
Mar 0.0 1.2 15.1 0.1
Apr 0.0 0.0 4.2 0.0
May 0.7 0.0 0.2 0.0
Jun 6.4 0.0 0.0 0.0
Jul 13.0 0.0 0.0 0.0
Aug 8.9 0.0 0.0 0.0
Sep 3.4 0.0 0.2 0.0
Oct 0.1 0.0 3.4 0.0
Nov 0.0 1.1 13.1 0.0
Dec 0.0 6.9 23.5 1.3
         
Annual 32.3 28.8 108.4 6.0
Winter 0.0 26.5 71.8 5.9
Spring 0.8 1.2 19.6 0.1
Summer 28.2 0.0 0.0 0.0
Fall 3.5 1.1 16.7 0.0


Snowfall Summary

Station: 111280 CARLINVILLE, IL


1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.0 4.2 3.4 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.4 4.0 20.7

Snowfall Extremes

Period of Record: 1891-2006

Month High (in) Year 1-Day Max (in) Date
Jan 25.4 1977 8.5 01-31-1982
Feb 22.5 1914 14.0 02-13-1914
Mar 22.3 1978 10.0 03-19-1906
Apr 8.5 1971 6.0 04-05-1971
May 3.0 1929 3.0 05-02-1929
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 2.0 1929 2.0 10-23-1929
Nov 9.7 1951 9.5 11-06-1951
Dec 25.5 1973 10.5 12-19-1973
Season (Jul-Jun) 49.4 1977-1978 14.0 02-13-1914

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 1.1 0.7 0.2
Feb 2.7 1.1 0.7 0.2
Mar 1.6 1.1 0.6 0.2
Apr 0.3 0.2 0.1 0.1
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 0.4 0.3 0.1
Dec 2.4 1.3 0.7 0.2
Annual 12.2 6.6 3.6 1.1


Growing Season Summary

Station: 111280 CARLINVILLE, 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 21 62 200 452 762 1003 1153 1089 841 520 197 51 6336
45 7 29 118 319 607 853 998 934 691 374 117 24 5064
50 2 11 65 204 454 703 844 779 543 246 62 9 3917
55 0 3 31 116 310 553 689 624 398 141 27 3 2896
60 0 0 12 56 186 405 534 469 265 68 9 0 2007
50** 11 37 122 274 484 680 791 741 551 319 109 26 4138

**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 3/24 3/30 5/03 5/08 10/11 9/23 9/23 10/25 11/10
30 4/07 3/23 3/27 4/30 5/08 10/21 10/02 10/07 11/05 11/10
28 4/06 3/18 3/22 4/18 4/21 10/26 10/02 10/10 11/11 11/23
24 3/22 3/06 3/10 4/10 4/18 11/08 10/13 10/21 12/01 12/11
20 3/14 2/03 2/24 3/27 4/09 11/21 10/24 11/07 12/10 12/22
16 3/06 1/15 2/05 3/20 3/25 12/01 11/02 11/09 12/22 1/01

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 182 137 160 202 205
30 192 159 170 221 228
28 206 172 185 229 234
24 228 191 202 257 271
20 253 221 229 282 288
16 272 228 239 305 340

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