Historical Climate Data

Precipitation Summary

Station: 115079 LINCOLN, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.70 1.55 3.11 3.63 4.42 3.97 4.35 4.00 3.13 2.81 3.00 2.63 38.30

Precipitation Extremes

Period of Record: 1906-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 6.23 1949 0.04 1986 2.28 01-10-1975
Feb 4.61 1942 0.12 1987 2.09 02-04-1942
Mar 7.14 1973 0.47 1910 3.50 03-11-1939
Apr 10.39 1957 0.56 1971 3.96 04-30-1998
May 12.70 1995 0.74 1934 5.22 05-12-1914
Jun 9.83 1947 0.42 1936 4.71 06-28-1951
Jul 15.93 1992 0.54 1940 4.76 07-10-2003
Aug 8.58 2002 0.31 1943 3.70 08-16-2002
Sep 14.31 1911 0.17 1940 3.55 09-20-1986
Oct 11.07 1941 0.24 1964 3.73 10-04-1991
Nov 7.55 1992 0.02 1933 2.50 11-02-1936
Dec 9.52 1982 0.20 1958 5.18 12-03-1982
             
Annual 50.84 1927 23.74 2005 5.22 05-12-1914
Winter 15.57 1950 1.46 1920 5.18 12-03-1982
Spring 19.75 1995 4.07 2005 5.22 05-12-1914
Summer 23.76 1981 3.15 1988 4.76 07-10-2003
Fall 22.14 1926 3.17 1953 3.73 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 8.2 4.3 0.7 0.2
Feb 7.4 3.9 0.8 0.2
Mar 10.2 6.6 2.2 0.5
Apr 11.9 7.5 2.2 0.7
May 10.9 7.4 3.0 1.2
Jun 9.0 6.1 2.9 1.1
Jul 9.3 6.2 2.8 1.3
Aug 8.8 5.9 2.8 1.1
Sep 8.2 5.3 2.2 0.7
Oct 8.3 5.3 2.0 0.6
Nov 9.8 6.5 2.1 0.7
Dec 9.4 5.6 1.5 0.5
         
Annual 111.4 70.7 25.4 8.8
Winter 25.0 13.8 3.0 0.9
Spring 32.9 21.5 7.4 2.3
Summer 27.1 18.2 8.5 3.6
Fall 26.3 17.1 6.4 2.0

Temperature Summary

Station 115079 LINCOLN, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 32.5 38.3 50.4 63.1 74.0 83.0 86.0 84.0 78.0 66.5 50.7 37.9 62.0
Low °F 14.7 19.3 28.7 38.6 49.8 60.7 63.9 61.5 52.6 40.9 31.2 20.6 40.2
Mean °F 23.6 28.8 39.6 50.9 61.9 71.9 75.0 72.8 65.3 53.7 41.0 29.3 51.2
HDD 1283 1014 789 429 173 15 1 15 77 361 722 1108 5987
CDD 0 0 0 4 77 220 309 254 86 12 0 0 962

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

Temperature Extremes

Period of Record: 1906-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 38.4 1933 11.3 1918 70 01-06-1907 -25 01-05-1999
Feb 40.1 1930 18.1 1979 75 02-27-1996 -23 02-27-1934
Mar 52.6 1946 26.2 1960 86 03-29-1985 -14 03-10-1934
Apr 59.6 1955 44.3 1907 93 04-11-1930 14 04-05-1920
May 71.0 1962 56.8 1924 102 05-31-1934 24 05-10-1966
Jun 79.5 1934 66.1 1928 105 06-01-1934 35 06-11-1913
Jul 85.1 1936 71.3 1924 113 07-15-1936 41 07-15-1930
Aug 82.0 1947 66.9 2004 106 08-09-1934 36 08-31-1915
Sep 72.9 1925 59.6 1918 104 09-06-1954 22 09-26-1928
Oct 64.8 1963 45.7 1925 95 10-02-1953 7 10-30-1925
Nov 51.1 1931 34.5 1996 92 11-02-1946 -3 11-28-1930
Dec 39.9 1923 15.6 1983 72 12-03-1970 -29 12-26-1914
                 
Annual 57.8 1961 49.5 1917 113 07-15-1936 -29 12-26-1914
Winter 37.8 1932 21.0 1978 75 02-27-1996 -29 12-26-1914
Spring 58.5 1977 47.0 1984 102 05-31-1934 -14 03-10-1934
Summer 80.0 1936 69.7 2004 113 07-15-1936 35 06-11-1913
Fall 60.9 1931 50.0 1976 104 09-06-1954 -3 11-28-1930

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 14.6 28.8 4.5
Feb 0.0 8.5 23.6 2.7
Mar 0.0 2.0 19.0 0.1
Apr 0.1 0.1 5.6 0.0
May 1.1 0.0 0.1 0.0
Jun 6.0 0.0 0.0 0.0
Jul 9.0 0.0 0.0 0.0
Aug 6.2 0.0 0.0 0.0
Sep 2.5 0.0 0.1 0.0
Oct 0.0 0.0 5.4 0.0
Nov 0.0 1.3 16.5 0.0
Dec 0.0 8.1 26.3 2.1
         
Annual 25.4 33.9 124.1 9.2
Winter 0.0 31.2 78.7 9.3
Spring 1.2 2.1 25.1 0.1
Summer 21.3 0.0 0.0 0.0
Fall 2.5 1.3 22.0 0.0

Snowfall Summary

Station: 115079 LINCOLN, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.0 4.7 2.1 0.5 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.2 20.7

Snowfall Extremes

Period of Record: 1906-2006

Month High (in) Year 1-Day Max (in) Date
Jan 20.0 1987 11.0 01-13-1927
Feb 24.0 1914 13.0 02-23-1914
Mar 21.0 1934 7.5 03-16-1960
Apr 7.8 1920 6.0 04-04-1920
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 2.8 1929 2.7 10-23-1929
Nov 10.0 1926 7.0 11-17-1926
Dec 21.5 1909 10.0 12-25-1909
Season (Jul-Jun) 45.0 1981-1982 13.0 02-23-1914

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 3.1 1.7 0.9 0.2
Feb 3.1 1.7 0.9 0.2
Mar 1.5 0.9 0.5 0.0
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 0.7 0.5 0.4 0.0
Dec 3.3 2.0 0.9 0.2
Annual 12.6 7.6 4.3 0.7

Growing Season Summary

Station: 115079 LINCOLN, 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 9 36 149 382 716 973 1107 1037 795 461 154 31 5866
45 3 14 83 256 563 823 952 883 646 321 87 14 4657
50 0 4 43 153 413 673 797 729 498 202 43 6 3570
55 0 0 20 81 274 524 643 575 354 111 17 2 2605
60 0 0 7 36 159 377 488 421 227 50 5 0 1771
50** 6 24 96 234 445 651 760 705 516 287 90 19 3843

**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 4/18 3/31 4/06 5/03 5/08 10/14 9/23 10/01 11/01 11/03
30 4/09 3/25 3/30 4/22 5/06 10/18 9/23 10/02 11/05 11/13
28 4/07 3/16 3/23 4/19 5/06 10/23 9/23 10/03 11/11 11/25
24 3/31 3/14 3/15 4/11 4/19 11/07 10/11 10/21 11/20 11/29
20 3/18 2/22 3/02 3/31 4/08 11/19 11/03 11/05 12/04 12/10
16 3/07 2/07 2/09 3/24 4/07 12/02 11/03 11/10 12/14 12/30

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 177 151 167 199 211
30 191 170 176 213 221
28 199 171 177 227 245
24 222 190 204 245 257
20 250 217 220 268 283
16 270 222 239 298 304

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