Historical Climate Data

Precipitation Summary

Station: 116711 PEORIA GTR PEORIA RGNL AP, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.50 1.67 2.83 3.56 4.17 3.84 4.02 3.16 3.12 2.77 2.99 2.40 36.03

Precipitation Extremes

Period of Record: 1893-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 8.11 1965 0.07 1919 4.43 01-01-1965
Feb 5.37 1997 0.14 1907 2.83 02-06-1942
Mar 6.95 1973 0.39 1958 2.88 03-14-1944
Apr 8.66 1947 0.71 1971 5.06 04-24-1950
May 11.49 1915 0.47 1934 5.52 05-18-1927
Jun 11.69 1974 0.45 1936 4.74 06-24-1911
Jul 10.15 1993 0.33 1988 4.09 07-17-1895
Aug 8.61 1965 0.25 1992 4.32 08-29-1955
Sep 13.09 1961 0.03 1979 4.11 09-13-1961
Oct 10.53 1941 0.03 1964 3.62 10-10-1969
Nov 7.62 1985 0.07 1917 4.26 11-27-1990
Dec 6.34 1949 0.29 1930 2.60 12-18-1895
             
Annual 55.35 1990 22.16 1988 5.52 05-18-1927
Winter 13.18 1950 1.37 1963 4.43 01-01-1965
Spring 18.64 1927 3.36 1934 5.52 05-18-1927
Summer 24.18 1902 3.04 1988 4.74 06-24-1911
Fall 19.58 1926 2.92 2002 4.26 11-27-1990

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 9.9 4.1 0.7 0.2
Feb 8.5 3.9 0.9 0.3
Mar 10.9 6.1 1.8 0.4
Apr 11.7 7.2 2.3 0.8
May 11.6 7.9 2.8 1.0
Jun 9.6 6.4 2.5 0.8
Jul 9.2 5.9 2.7 1.3
Aug 9.3 5.6 2.3 0.8
Sep 8.4 5.6 2.3 0.9
Oct 9.2 5.6 1.9 0.6
Nov 10.2 5.8 2.0 0.6
Dec 10.1 5.1 1.5 0.6
         
Annual 118.7 69.3 23.7 8.3
Winter 28.5 13.1 3.1 1.1
Spring 34.3 21.3 6.9 2.2
Summer 28.1 18.0 7.5 2.9
Fall 27.8 17.0 6.2 2.1

Temperature Summary

Station 116711 PEORIA GTR PEORIA RGNL AP, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 30.7 36.6 49.4 62.0 73.0 82.2 85.7 83.6 76.7 64.4 48.8 35.5 60.7
Low °F 14.3 19.7 30.2 40.3 50.8 60.1 64.6 62.6 54.0 42.3 31.4 20.1 40.9
Mean °F 22.5 28.2 39.8 51.2 61.9 71.1 75.1 73.1 65.4 53.4 40.1 27.8 50.8
HDD 1316 1045 788 423 159 19 2 7 94 368 738 1138 6097
CDD 0 0 1 11 64 210 325 263 112 12 0 0 998

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 37.6 2006 8.6 1977 71 01-23-1909 -25 01-17-1977
Feb 39.6 1998 14.7 1979 74 02-10-1932 -26 02-13-1905
Mar 50.1 1946 22.6 1960 87 03-21-1907 -11 03-08-1943
Apr 58.8 1915 43.4 1907 92 04-29-1894 14 04-05-1920
May 68.7 1934 55.1 1907 104 05-31-1934 25 05-10-1966
Jun 79.2 1934 65.8 1916 105 06-01-1934 39 06-04-1945
Jul 84.3 1936 71.1 1924 113 07-15-1936 46 07-26-1911
Aug 82.0 1947 67.2 1915 106 08-18-1936 41 08-26-1910
Sep 73.1 1931 58.3 1918 104 09-05-1899 24 09-28-1942
Oct 64.2 1963 43.4 1925 93 10-03-2006 7 10-30-1925
Nov 50.2 1931 32.0 1976 81 11-01-1937 -2 11-26-1977
Dec 38.6 1931 15.2 1983 71 12-03-1970 -24 12-28-1924
                 
Annual 58.8 1900 47.8 1917 113 07-15-1936 -26 02-13-1905
Winter 36.2 1932 17.1 1979 74 02-10-1932 -26 02-13-1905
Spring 56.7 1977 44.4 1960 104 05-31-1934 -11 03-08-1943
Summer 78.9 1936 69.0 1915 113 07-15-1936 39 06-04-1945
Fall 60.8 1931 47.5 1976 104 09-05-1999 -2 11-26-1977

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 16.4 29.2 5.8
Feb 0.0 10.4 24.2 3.0
Mar 0.0 2.7 18.1 0.1
Apr 0.1 0.1 5.4 0.0
May 0.5 0.0 0.3 0.0
Jun 4.4 0.0 0.0 0.0
Jul 8.6 0.0 0.0 0.0
Aug 5.8 0.0 0.0 0.0
Sep 1.9 0.0 0.1 0.0
Oct 0.0 0.0 4.4 0.0
Nov 0.0 2.1 16.9 0.1
Dec 0.0 11.0 26.7 2.6
         
Annual 21.3 42.7 125.2 11.6
Winter 0.0 37.8 80.0 11.4
Spring 0.6 2.8 23.8 0.1
Summer 18.8 0.0 0.0 0.0
Fall 1.9 2.1 21.3 0.1

Snowfall Summary

Station: 116711 PEORIA GTR PEORIA RGNL AP, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 8.3 5.6 3.2 1.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 7.1 27.3

Snowfall Extremes

Period of Record: 1893-2006

Month High (in) Year 1-Day Max (in) Date
Jan 27.4 1979 12.2 01-13-1979
Feb 15.2 1989 6.4 02-10-1981
Mar 16.9 1960 8.1 03-25-1957
Apr 13.4 1982 5.9 04-08-1982
May 0.1 1966 0.1 05-08-1966
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 1.8 1967 1.4 10-26-1967
Nov 9.1 1974 6.8 11-26-1975
Dec 21.7 1977 8.0 12-11-2000
Season (Jul-Jun) 54.3 1978-1979 12.2 01-13-1979

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 5.0 1.8 1.1 0.1
Feb 5.0 1.8 1.1 0.1
Mar 2.5 1.1 0.4 0.1
Apr 0.8 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 0.1 0.0 0.0 0.0
Nov 2.5 0.6 0.3 0.0
Dec 5.6 2.0 1.3 0.2
Annual 23.6 8.5 4.8 0.8

Growing Season Summary

Station: 116711 PEORIA GTR PEORIA RGNL 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 7 27 135 359 690 945 1102 1041 776 436 132 23 5679
45 2 10 75 236 536 795 947 886 626 298 71 9 4496
50 0 2 38 138 386 645 792 731 479 182 33 3 3435
55 0 0 17 70 251 495 637 576 337 99 13 1 2501
60 0 0 6 30 142 348 482 422 213 43 3 0 1694
50** 4 17 83 210 423 630 756 708 495 257 72 12 3674

**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 3/28 4/05 5/05 5/13 10/15 9/19 9/27 11/03 11/03
30 4/12 3/27 4/01 4/27 5/13 10/18 9/22 10/03 11/05 11/17
28 4/07 3/23 3/25 4/16 4/22 10/27 10/02 10/11 11/14 11/19
24 4/04 3/14 3/18 4/11 4/18 11/11 10/20 10/23 11/25 11/29
20 3/18 2/12 3/05 4/07 4/09 11/18 10/20 11/03 12/02 12/10
16 3/11 2/07 2/13 3/25 4/07 11/26 11/01 11/10 12/19 12/24

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 176 150 159 200 204
30 189 150 172 210 222
28 205 176 187 224 232
24 220 194 210 246 255
20 244 194 219 265 282
16 267 220 235 287 288

Back to the Station List

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