Historical Climate Data

Precipitation Summary

Station: 118684 TUSCOLA, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 2.29 2.12 3.14 3.84 3.96 4.15 4.64 3.73 3.14 2.86 3.74 3.05 40.66

Precipitation Extremes

Period of Record: 1893-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 8.96 1950 0.00 1944 3.40 01-21-1999
Feb 6.16 1990 0.29 1947 2.30 02-23-1985
Mar 8.86 1898 0.45 1987 3.86 03-14-1922
Apr 9.55 1994 0.64 1971 2.77 04-29-1996
May 13.14 1996 0.21 1930 3.79 05-08-1961
Jun 9.23 1900 0.46 1988 3.99 06-25-1900
Jul 14.03 1992 0.48 1893 3.89 07-10-2003
Aug 9.45 1934 0.50 1893 6.30 08-10-1933
Sep 14.05 1926 0.13 1979 4.68 09-15-1931
Oct 8.70 1941 0.17 1964 3.28 10-01-1927
Nov 11.31 1985 0.08 1904 3.51 11-02-1936
Dec 8.34 1990 0.14 1919 3.00 12-29-1990
             
Annual 55.05 1927 24.90 1914 6.30 08-10-1933
Winter 18.47 1950 2.05 1920 3.40 01-21-1999
Spring 22.46 1996 3.85 1895 3.86 03-14-1922
Summer 21.38 1981 1.93 1893 6.30 08-10-1933
Fall 20.67 1926 3.05 1963 4.68 09-15-1931

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 7.6 5.2 1.5 0.4
Feb 7.3 4.8 1.3 0.6
Mar 9.7 7.0 2.4 0.5
Apr 11.1 8.1 2.6 0.8
May 10.3 7.5 2.5 1.0
Jun 9.2 6.9 3.3 1.2
Jul 8.3 6.3 3.1 1.3
Aug 7.7 5.3 2.5 1.2
Sep 6.9 5.2 2.5 0.9
Oct 7.6 5.6 2.0 0.7
Nov 8.6 6.8 2.9 1.0
Dec 8.7 6.1 2.0 0.8
         
Annual 103.1 74.9 28.6 10.5
Winter 23.5 16.2 4.8 1.8
Spring 31.2 22.6 7.4 2.4
Summer 25.1 18.5 8.9 3.7
Fall 23.1 17.4 7.4 2.6

Temperature Summary

Station 118684 TUSCOLA, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 34.4 40.4 52.6 65.5 76.4 85.4 88.0 86.0 80.4 68.3 52.2 39.3 64.1
Low °F 18.0 22.9 32.7 42.3 53.1 62.3 65.9 63.8 56.4 45.2 34.5 23.9 43.4
Mean °F 26.2 31.7 42.7 53.9 64.8 73.9 77.0 74.9 68.4 56.8 43.4 31.6 53.8
HDD 1203 935 693 342 134 9 0 8 44 279 649 1037 5333
CDD 0 0 0 8 127 273 370 314 147 25 0 0 1264

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 38.4 2006 9.8 1977 73 01-23-1909 -25 01-07-1912
Feb 40.8 1954 17.5 1978 73 02-26-1996 -23 02-13-1905
Mar 50.9 1910 26.1 1960 87 03-22-1907 -10 03-06-1960
Apr 59.7 1977 42.5 1907 92 04-29-1899 15 04-07-1990
May 71.7 1987 57.0 1907 98 05-26-1911 26 05-01-1903
Jun 78.5 1952 65.8 1903 105 06-26-1954 34 06-06-1894
Jul 81.6 1901 72.5 2004 113 07-14-1954 44 07-11-1898
Aug 80.7 1995 68.2 2004 104 08-02-1901 41 08-20-1897
Sep 73.4 1998 62.7 1974 103 09-05-1899 21 09-30-1899
Oct 64.3 1963 49.6 1976 93 10-02-1897 18 10-29-1910
Nov 51.3 1909 34.8 1951 82 11-01-1950 -7 11-25-1950
Dec 39.3 1994 17.2 1989 70 12-15-1948 -26 12-22-1989
                 
Annual 56.5 1998 49.1 1904 113 07-14-1954 -26 12-22-1989
Winter 35.7 1992 20.5 1978 73 01-23-1909 -26 12-22-1989
Spring 59.5 1977 47.3 1960 98 05-26-1911 -10 03-06-1960
Summer 78.2 1988 70.3 2004 113 07-14-1954 34 06-06-1994
Fall 59.5 1971 50.1 1976 103 09-05-1999 -7 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 13.0 28.0 4.0
Feb 0.0 7.7 22.6 2.2
Mar 0.0 1.5 17.1 0.1
Apr 0.0 0.0 5.5 0.0
May 2.2 0.0 0.2 0.0
Jun 9.3 0.0 0.0 0.0
Jul 12.8 0.0 0.0 0.0
Aug 8.9 0.0 0.0 0.0
Sep 4.2 0.0 0.2 0.0
Oct 0.1 0.0 4.2 0.0
Nov 0.0 0.9 14.7 0.0
Dec 0.0 6.3 24.5 1.4
         
Annual 37.9 29.3 116.3 7.9
Winter 0.0 27.2 75.2 7.8
Spring 2.2 1.5 22.8 0.1
Summer 31.0 0.0 0.0 0.0
Fall 4.3 0.8 18.8 0.0

Snowfall Summary

Station: 118684 TUSCOLA, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 8.3 4.8 2.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.4 23.1

Snowfall Extremes

Period of Record: 1893-2006

Month High (in) Year 1-Day Max (in) Date
Jan 26.7 1979 15.0 01-31-1982
Feb 16.3 1960 8.4 02-27-1984
Mar 13.5 1978 7.0 03-06-1989
Apr 3.0 1980 2.0 04-14-1980
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 1.0 1989 1.0 10-19-1989
Nov 11.7 1951 10.0 11-06-1951
Dec 30.5 1973 14.0 12-19-1973
Season (Jul-Jun) 48.3 1973-1974 15.0 01-31-1982

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 1.7 1.0 0.2
Feb 2.7 1.7 1.0 0.2
Mar 1.1 0.8 0.5 0.2
Apr 0.2 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 0.8 0.6 0.4 0.1
Dec 2.7 1.9 1.0 0.3
Annual 10.9 7.8 4.8 1.1

Growing Season Summary

Station: 118684 TUSCOLA, 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 38 175 420 761 1010 1138 1060 838 502 169 41 6156
45 5 13 101 288 607 861 983 906 688 358 94 18 4914
50 1 3 54 178 454 711 829 753 539 230 45 7 3798
55 0 0 25 96 311 561 674 599 394 130 17 2 2806
60 0 0 8 43 188 413 519 446 260 60 4 0 1939
50** 8 24 109 258 482 678 775 717 547 312 95 22 4022

**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 3/29 4/05 5/08 5/15 10/12 9/19 9/23 10/31 11/04
30 4/10 3/24 3/29 4/25 5/07 10/21 10/02 10/03 11/05 11/13
28 4/07 3/19 3/24 4/18 4/23 10/25 10/04 10/13 11/13 11/20
24 3/26 3/06 3/14 4/11 4/18 11/07 10/07 10/20 12/01 12/11
20 3/18 2/22 3/07 4/07 4/09 11/21 10/24 11/03 12/10 12/31
16 3/09 2/13 2/15 3/24 4/07 12/04 11/02 11/08 12/20 12/31

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 173 136 160 201 209
30 193 150 173 212 215
28 202 176 187 224 228
24 225 188 208 245 261
20 248 220 221 266 282
16 269 236 239 289 306

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