Historical Climate Data

Precipitation Summary

Station: 113413 GIBSON CITY, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.64 1.59 2.99 3.30 4.07 4.04 3.74 3.91 2.83 2.66 3.01 2.54 36.32

Precipitation Extremes

Period of Record: 1935-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 6.61 1950 0.04 1986 3.14 01-10-1975
Feb 5.44 1939 0.07 1987 2.08 02-25-2001
Mar 6.57 1938 0.56 1986 3.54 03-27-2004
Apr 10.32 1957 0.97 1971 3.80 04-24-1950
May 9.79 1943 0.29 1964 3.10 05-27-1956
Jun 9.59 1998 0.20 1988 3.94 06-25-1937
Jul 8.94 1962 0.22 1936 6.25 07-09-1951
Aug 9.95 1977 0.77 1953 6.62 08-03-1943
Sep 9.11 1965 0.01 1979 3.12 09-17-1960
Oct 9.87 1941 0.16 1964 3.70 10-03-1949
Nov 9.33 1985 0.25 1999 2.12 11-20-1991
Dec 7.15 1949 0.11 1976 4.35 12-21-1949
             
Annual 50.57 1993 22.11 1963 6.62 08-03-1943
Winter 17.81 1950 0.99 1963 4.35 12-21-1949
Spring 17.47 1957 3.86 1958 3.80 04-24-1950
Summer 20.41 1981 2.69 1988 6.62 08-03-1943
Fall 15.79 1941 2.83 1956 3.70 10-03-1949

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 8.0 4.1 0.7 0.1
Feb 7.4 4.0 0.9 0.2
Mar 10.1 6.2 2.0 0.7
Apr 11.3 7.5 2.0 0.5
May 11.0 7.4 3.0 1.0
Jun 10.1 6.8 2.9 0.9
Jul 8.7 6.6 2.5 1.1
Aug 8.8 5.9 2.5 1.1
Sep 7.6 4.9 1.9 0.7
Oct 8.7 5.1 1.7 0.7
Nov 10.0 6.4 1.9 0.7
Dec 9.5 5.5 1.6 0.4
         
Annual 111.3 70.5 23.5 8.2
Winter 24.9 13.6 3.2 0.7
Spring 32.5 21.1 7.0 2.2
Summer 27.6 19.4 7.8 3.2
Fall 26.4 16.4 5.4 2.1

Temperature Summary

Station 113413 GIBSON CITY, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 30.3 35.8 47.7 60.8 72.8 82.2 84.8 83.1 77.4 64.6 48.7 35.6 60.3
Low °F 13.8 18.7 28.9 38.4 49.7 59.4 62.7 60.2 51.7 40.1 30.9 19.8 39.5
Mean °F 22.1 27.3 38.3 49.6 61.3 70.8 73.8 71.7 64.6 52.4 39.8 27.7 50.0
HDD 1332 1057 828 465 191 21 3 21 89 399 756 1156 6318
CDD 0 0 0 3 75 194 273 229 75 8 0 0 857

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

Temperature Extremes

Period of Record: 1980-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 35.7 2006 16.8 1985 64 01-05-1997 -25 01-05-1999
Feb 37.9 1998 18.1 1989 73 02-27-1996 -17 02-10-1982
Mar 43.6 2000 29.3 1984 84 03-30-1986 -2 03-09-1984
Apr 54.9 1981 43.1 1982 90 04-26-1986 4 04-07-1982
May 68.1 1991 56.3 1997 94 05-29-1991 28 05-07-1989
Jun 75.1 1991 65.2 1982 103 06-26-1988 37 06-01-2003
Jul 77.1 1983 71.2 2000 102 07-16-1988 46 07-06-1983
Aug 78.8 1995 66.5 2004 103 08-18-1988 37 08-29-1986
Sep 70.7 1998 60.6 1993 96 09-02-1984 27 09-23-1995
Oct 56.5 1984 45.3 1987 87 10-06-1982 17 10-24-1981
Nov 47.8 2001 32.8 1996 79 11-02-2000 2 11-08-1991
Dec 36.9 1982 13.7 1983 69 12-03-1982 -23 12-24-1983
                 
Annual 53.7 1998 48.4 1989 103 06-26-1988 -25 01-05-1999
Winter 32.4 1998 21.2 1984 73 02-27-1996 -25 01-05-1999
Spring 54.7 1991 45.0 1984 94 05-29-1991 -2 03-09-1984
Summer 75.8 1995 68.8 2004 103 06-26-1988 37 06-01-1903
Fall 56.3 1998 49.7 1995 96 09-02-1984 2 11-08-1991

Temperature Threshold Climatology

Derived from 1980-2000 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 15.9 28.6 4.8
Feb 0.0 9.3 24.4 2.5
Mar 0.0 3.4 20.7 0.1
Apr 0.1 0.1 6.8 0.0
May 0.8 0.0 0.2 0.0
Jun 5.6 0.0 0.0 0.0
Jul 6.9 0.0 0.0 0.0
Aug 4.9 0.0 0.0 0.0
Sep 2.2 0.0 0.5 0.0
Oct 0.0 0.0 7.4 0.0
Nov 0.0 2.0 17.8 0.0
Dec 0.0 11.0 27.0 3.1
         
Annual 20.4 41.3 133.1 10.3
Winter 0.0 36.0 80.0 10.3
Spring 0.9 3.4 27.2 0.1
Summer 17.4 0.0 0.0 0.0
Fall 2.1 2.0 26.1 0.0

Snowfall Summary

Station: 113413 GIBSON CITY, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.2 5.6 2.2 0.9 0.0 0.0 0.0 0.0 0.0 0.1 1.6 5.7 23.3

Snowfall Extremes

Period of Record: 1935-2006

Month High (in) Year 1-Day Max (in) Date
Jan 26.2 1979 8.0 01-10-1987
Feb 15.1 1980 6.0 02-14-1978
Mar 12.9 1960 7.0 03-25-1957
Apr 12.3 1982 6.0 04-09-1982
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 2.0 1989 2.0 10-20-1989
Nov 10.0 1951 9.0 11-06-1951
Dec 23.4 1983 10.0 12-19-1973
Season (Jul-Jun) 41.1 1983-1984 10.0 12-19-1973

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 3.5 2.3 1.2 0.2
Feb 3.5 2.3 1.2 0.2
Mar 1.8 0.9 0.4 0.0
Apr 0.5 0.3 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 0.1 0.0 0.0
Nov 1.2 0.7 0.3 0.0
Dec 3.4 2.4 1.3 0.2
Annual 14.5 9.1 4.8 0.8

Growing Season Summary

Station: 113413 GIBSON CITY, 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 10 25 118 315 672 937 1053 990 741 400 122 25 5414
45 3 8 65 200 519 787 899 835 592 268 64 11 4255
50 0 2 34 112 371 637 744 680 446 161 29 5 3227
55 0 0 16 54 238 488 590 526 309 85 10 2 2322
60 0 0 5 22 133 344 435 372 190 36 2 0 1544
50** 5 16 78 189 412 620 715 661 477 253 69 14 3511

**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 4/22 3/29 4/03 5/08 5/09 10/06 9/20 9/23 10/22 10/25
30 4/12 3/29 4/02 5/03 5/09 10/12 9/23 9/28 10/25 11/04
28 4/09 3/19 3/27 4/22 5/07 10/21 9/23 10/03 11/03 11/05
24 4/03 2/28 3/16 4/19 4/23 11/04 10/08 10/17 11/18 11/23
20 3/20 2/19 3/04 4/10 4/10 11/13 10/08 10/19 12/03 12/11
16 3/14 2/10 2/22 4/05 4/08 11/22 11/03 11/13 12/22 12/25

Length of Growing Season (Days)

Derived from 1980-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 174 136 150 188 200
30 176 140 168 200 209
28 189 150 170 211 228
24 215 182 197 245 246
20 242 182 210 265 274
16 253 218 227 294 300

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