Historical Climate Data

Precipitation Summary

Station: 118740 URBANA, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.90 2.01 3.21 3.65 4.80 4.21 4.67 4.37 3.22 2.81 3.45 2.76 41.06

Precipitation Extremes

Period of Record: 1888-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 7.62 1950 0.06 1892 2.43 01-26-1967
Feb 6.05 1990 0.15 1947 2.30 02-22-1990
Mar 8.35 1922 0.38 1910 2.93 03-13-1917
Apr 9.55 1964 0.50 1899 3.09 04-20-1964
May 11.20 1943 0.22 1925 4.50 05-26-1921
Jun 11.58 1902 0.32 1988 3.89 06-19-1983
Jul 13.82 1992 0.47 1916 4.43 07-30-1987
Aug 10.02 1993 0.06 1893 5.32 08-12-1993
Sep 9.76 1926 0.06 1891 3.91 09-15-1931
Oct 9.01 1941 0.16 1964 3.72 10-21-1983
Nov 10.08 1985 0.00 1904 4.07 11-02-1936
Dec 6.63 1967 0.05 1890 2.97 12-13-1901
             
Annual 58.54 1993 18.28 1894 5.32 08-12-1993
Winter 16.33 1950 1.40 1920 2.97 12-13-1901
Spring 19.78 1944 4.42 1932 4.50 05-26-1921
Summer 25.40 1902 2.01 1893 5.32 08-12-1993
Fall 17.25 1941 3.02 1953 4.07 11-02-1936

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 4.9 1.0 0.2
Feb 9.0 4.5 1.1 0.4
Mar 11.2 7.1 2.2 0.6
Apr 12.1 7.7 2.2 0.7
May 11.0 7.8 3.2 1.5
Jun 9.9 6.3 2.8 1.3
Jul 9.2 6.8 3.0 1.3
Aug 9.4 6.7 3.0 1.3
Sep 7.8 5.3 2.2 0.8
Oct 9.0 5.3 2.0 0.6
Nov 10.2 6.2 2.4 0.9
Dec 10.8 5.7 1.7 0.5
         
Annual 119.5 74.2 27.0 10.1
Winter 29.7 15.1 3.9 1.1
Spring 34.3 22.5 7.7 2.7
Summer 28.5 19.7 8.9 3.9
Fall 27.0 16.8 6.6 2.4

Temperature Summary

Station 118740 URBANA, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 32.0 37.6 49.5 62.2 73.6 82.6 85.2 83.2 77.6 65.1 49.5 36.8 61.2
Low °F 16.2 21.1 30.4 39.9 51.1 60.4 64.4 62.4 54.3 42.9 32.6 21.9 41.5
Mean °F 24.1 29.4 40.0 51.1 62.4 71.5 74.8 72.8 66.0 54.0 41.1 29.4 51.4
HDD 1268 998 775 422 174 17 1 11 73 353 718 1106 5916
CDD 0 0 0 4 92 212 304 254 101 12 0 0 979

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

Temperature Extremes

Period of Record: 1888-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 37.9 2006 10.7 1977 70 01-23-1909 -25 01-19-1994
Feb 40.1 1954 16.8 1905 72 02-25-2000 -25 02-09-1899
Mar 51.8 1946 25.9 1960 85 03-21-1907 -5 03-17-1906
Apr 58.5 1955 42.5 1907 95 04-17-1894 15 04-02-1899
May 70.8 1977 55.3 1917 97 05-31-1934 26 05-01-1903
Jun 78.5 1934 65.1 1889 103 06-02-1934 34 06-06-1894
Jul 83.1 1936 70.3 1891 109 07-14-1954 41 07-02-1904
Aug 80.9 1947 67.1 1915 102 08-17-1988 37 08-23-1888
Sep 72.2 1925 58.6 1918 102 09-05-1899 24 09-30-1899
Oct 64.5 1963 45.2 1925 93 10-03-1954 12 10-30-1895
Nov 50.2 1931 34.2 1976 80 11-01-1950 -5 11-25-1950
Dec 42.3 1889 16.3 1983 71 12-04-1998 -20 12-28-1924
                 
Annual 55.4 1931 48.5 1917 109 07-14-1954 -25 01-19-1994
Winter 37.6 1932 20.3 1978 72 02-25-1900 -25 01-19-1994
Spring 57.9 1977 46.5 1960 97 05-31-1934 -5 03-17-1906
Summer 78.0 1936 68.7 1889 109 07-14-1954 34 06-06-1994
Fall 60.4 1931 49.0 1889 102 09-05-1999 -5 11-25-1950

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 15.5 28.6 3.9
Feb 0.0 9.7 23.4 1.8
Mar 0.0 2.5 17.9 0.0
Apr 0.1 0.1 5.2 0.0
May 1.2 0.0 0.1 0.0
Jun 5.6 0.0 0.0 0.0
Jul 7.1 0.0 0.0 0.0
Aug 4.6 0.0 0.0 0.0
Sep 2.2 0.0 0.1 0.0
Oct 0.0 0.0 3.8 0.0
Nov 0.0 1.6 15.4 0.0
Dec 0.0 9.7 25.9 1.8
         
Annual 20.8 39.1 120.3 7.6
Winter 0.0 34.9 77.8 7.6
Spring 1.2 2.6 23.2 0.0
Summer 17.3 0.0 0.0 0.0
Fall 2.2 1.6 19.3 0.0

Snowfall Summary

Station: 118740 URBANA, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 8.6 5.5 3.3 0.5 0.0 0.0 0.0 0.0 0.0 0.1 2.1 6.1 26.2

Snowfall Extremes

Period of Record: 1888-2006

Month High (in) Year 1-Day Max (in) Date
Jan 28.3 1979 11.4 01-31-1982
Feb 18.5 1905 11.0 02-21-1912
Mar 32.0 1906 14.0 03-20-1906
Apr 8.0 1920 6.0 04-05-1920
May 2.5 1929 2.5 05-02-1929
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 3.3 1989 2.8 10-19-1989
Nov 11.2 1932 9.1 11-27-1980
Dec 19.1 1983 9.5 12-19-1973
Season (Jul-Jun) 67.2 1977-1978 14.0 03-20-1906

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 3.9 1.7 1.0 0.2
Feb 3.9 1.7 1.0 0.2
Mar 2.5 0.9 0.5 0.1
Apr 0.5 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 0.7 0.3 0.1
Dec 4.7 1.8 1.0 0.2
Annual 19.1 8.2 4.4 0.8

Growing Season Summary

Station: 118740 URBANA, 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 11 32 141 364 711 960 1091 1030 790 452 145 29 5762
45 3 11 78 239 556 810 936 875 640 311 79 12 4557
50 1 3 39 138 406 660 781 720 492 193 38 5 3481
55 0 0 16 69 268 511 626 565 349 105 15 1 2530
60 0 0 5 29 154 363 472 410 220 45 4 0 1707
50** 6 19 85 212 436 641 751 702 505 266 78 16 3721

**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 4/15 3/24 4/04 4/30 5/07 10/17 9/21 10/03 10/30 11/12
30 4/10 3/23 3/26 4/22 5/07 10/22 9/22 10/05 11/06 11/12
28 4/07 3/19 3/24 4/16 4/23 11/02 10/02 10/15 11/14 11/28
24 3/25 2/22 3/10 4/10 4/10 11/11 10/14 11/02 11/29 11/29
20 3/18 2/16 3/05 4/07 4/09 11/23 10/24 11/04 12/09 12/21
16 3/10 2/07 2/14 3/26 4/07 12/05 11/02 11/14 12/18 12/21

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 178 155 167 209 214
30 194 171 174 216 227
28 210 176 192 226 248
24 234 200 210 256 263
20 250 213 221 274 291
16 268 236 246 296 310

Back to the Station List

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