Historical Climate Data

Precipitation Summary

Station: 118147 SPARTA 1 W, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 2.43 2.53 4.06 4.10 4.51 3.75 4.19 3.31 3.08 3.26 4.21 3.31 42.74

Precipitation Extremes

Period of Record: 1893-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 11.89 1916 0.14 1986 4.12 01-30-1916
Feb 5.68 1950 0.22 1947 3.22 02-13-1946
Mar 12.87 1945 0.03 1910 5.20 03-25-1904
Apr 11.32 1994 0.53 1915 5.02 04-29-1996
May 12.13 1990 0.50 1914 3.80 05-07-1956
Jun 10.81 1915 0.07 1991 4.53 06-11-1938
Jul 13.33 1958 0.11 1918 4.11 07-28-1979
Aug 13.22 1923 0.07 1909 6.29 08-05-1923
Sep 8.24 1926 0.20 1985 3.13 09-18-1988
Oct 15.07 1919 0.00 1992 5.00 10-12-1893
Nov 11.45 1985 0.19 1949 4.16 11-19-1985
Dec 10.57 1982 0.15 1955 5.35 12-21-1967
             
Annual 62.59 1949 23.32 1953 6.29 08-05-1923
Winter 19.54 1950 3.01 1931 5.35 12-21-1967
Spring 24.72 1945 4.54 1930 5.20 03-25-1904
Summer 24.71 1915 2.36 1930 6.29 08-05-1923
Fall 20.37 1919 2.76 1953 5.00 10-12-1893

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 7.4 4.5 1.7 0.5
Feb 6.7 4.7 1.9 0.5
Mar 10.9 7.2 3.0 1.1
Apr 10.1 6.9 2.9 1.0
May 10.2 7.0 2.8 1.2
Jun 9.2 6.5 2.6 1.3
Jul 8.1 5.9 2.6 1.2
Aug 7.4 5.3 2.3 0.9
Sep 7.2 4.5 1.8 0.9
Oct 7.7 5.3 2.4 1.0
Nov 8.8 6.4 2.9 1.5
Dec 8.2 5.7 2.4 0.8
         
Annual 102.0 70.1 29.5 12.0
Winter 22.3 14.9 6.0 1.8
Spring 31.3 21.1 8.8 3.4
Summer 24.7 17.7 7.5 3.4
Fall 23.8 16.2 7.2 3.3

Temperature Summary

Station 118147 SPARTA 1 W, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 37.8 44.2 54.8 65.5 75.3 84.1 88.3 86.9 79.6 69.2 54.4 42.4 65.2
Low °F 20.3 24.5 33.2 43.1 52.7 62.3 66.7 64.4 55.9 44.7 34.9 25.3 44.0
Mean °F 29.1 34.4 44.0 54.3 64.0 73.2 77.5 75.7 67.8 57.0 44.7 33.9 54.6
HDD 1113 859 651 330 128 7 0 6 56 270 610 967 4997
CDD 0 0 0 10 97 253 387 336 138 21 0 0 1242

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 43.5 1933 17.6 1977 77 01-19-1907 -20 01-13-1912
Feb 45.8 1954 22.1 1899 82 02-10-1932 -23 02-12-1899
Mar 57.5 1946 32.2 1960 90 03-23-1910 -6 03-05-1960
Apr 64.3 1954 47.9 1907 94 04-11-1930 20 04-21-1904
May 74.3 1962 59.2 1997 99 05-30-1934 28 05-01-1903
Jun 82.7 1952 68.0 1903 107 06-29-1931 40 06-16-1917
Jul 86.2 1934 73.5 1996 114 07-24-1934 48 07-04-1968
Aug 85.4 1936 69.7 2004 112 08-09-1930 41 08-15-1994
Sep 78.3 1933 62.3 1918 105 09-05-1899 22 09-30-1899
Oct 68.3 1963 51.5 1925 96 10-02-1953 20 10-30-1895
Nov 56.4 1909 37.3 1996 85 11-04-1924 -4 11-30-1929
Dec 46.1 1923 21.2 2000 76 12-03-1970 -17 12-20-1901
                 
Annual 61.2 1975 52.4 2003 114 07-24-1934 -23 02-12-1999
Winter 44.1 1932 26.3 1978 82 02-10-1932 -23 02-12-1999
Spring 62.0 1977 51.3 1996 99 05-30-1934 -6 03-05-1960
Summer 83.0 1936 71.2 2004 114 07-24-1934 40 06-16-1917
Fall 65.2 1931 52.6 1996 105 09-05-1999 -4 11-30-1929

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 9.7 25.7 1.6
Feb 0.0 4.6 18.8 0.5
Mar 0.0 0.7 13.0 0.1
Apr 0.2 0.0 3.3 0.0
May 1.7 0.0 0.1 0.0
Jun 8.9 0.0 0.0 0.0
Jul 16.3 0.0 0.0 0.0
Aug 11.9 0.0 0.0 0.0
Sep 4.5 0.0 0.1 0.0
Oct 0.1 0.0 2.7 0.0
Nov 0.0 0.5 11.6 0.0
Dec 0.0 4.9 21.9 0.8
         
Annual 43.5 20.3 97.0 2.9
Winter 0.0 19.2 66.3 2.9
Spring 1.9 0.7 16.4 0.1
Summer 37.2 0.0 0.0 0.0
Fall 4.5 0.5 14.7 0.0

Snowfall Summary

Station: 118147 SPARTA 1 W, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 5.1 3.2 1.8 0.5 0.0 0.0 0.0 0.0 0.0 0.0 1.0 3.1 14.7

Snowfall Extremes

Period of Record: 1893-2006

Month High (in) Year 1-Day Max (in) Date
Jan 21.2 1979 11.0 01-31-1982
Feb 19.5 1910 12.0 02-15-1908
Mar 25.4 1912 9.4 03-27-1947
Apr 10.0 1971 8.0 04-20-1904
May 1.0 1929 1.0 05-02-1929
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 3.5 1925 2.5 10-28-1925
Nov 8.7 1980 8.0 11-26-1975
Dec 16.5 1973 8.0 12-25-2002
Season (Jul-Jun) 60.7 1911-1912 12.0 02-15-1908

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 2.4 1.1 0.6 0.1
Feb 2.4 1.1 0.6 0.1
Mar 1.3 0.5 0.4 0.1
Apr 0.3 0.1 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 0.4 0.3 0.2 0.1
Dec 2.1 1.1 0.5 0.2
Annual 10.0 4.7 2.6 0.7

Growing Season Summary

Station: 118147 SPARTA 1 W, 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 40 97 260 500 802 1048 1193 1137 882 578 241 72 6830
45 16 50 163 363 647 898 1039 983 732 428 150 35 5488
50 5 21 91 240 493 748 884 828 583 291 84 15 4274
55 1 7 44 142 345 598 730 673 437 178 39 5 3191
60 0 1 17 72 214 449 575 519 300 91 15 1 2248
50** 23 61 159 308 515 714 814 775 582 362 137 38 4476

**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 4/11 3/22 3/26 4/26 5/04 10/20 9/23 10/03 11/05 11/12
30 4/06 3/07 3/22 4/16 5/04 11/01 10/08 10/16 11/14 11/28
28 4/05 3/06 3/16 4/12 4/19 11/06 10/09 10/21 11/17 12/04
24 3/18 3/02 3/09 4/11 4/18 11/14 10/24 10/31 12/05 12/09
20 3/10 2/07 2/14 3/25 3/27 11/22 11/02 11/09 12/20 3/01
16 2/16 1/11 1/31 3/12 3/25 12/12 11/03 11/19 12/24 1/04

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 191 167 170 212 215
30 207 168 191 230 255
28 215 190 197 238 261
24 239 202 213 261 269
20 261 228 241 288 342
16 291 237 267 326 344

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