Historical Climate Data

Precipitation Summary

Station: 117004 PRINCEVILLE 2W, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.95 1.72 3.06 3.72 4.58 3.92 3.91 3.72 3.39 2.84 2.98 2.45 38.24

Precipitation Extremes

Period of Record: 1905-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 7.09 1999 0.11 1956 5.00 01-20-2000
Feb 5.75 1997 0.00 1947 3.20 02-21-1997
Mar 8.76 1984 0.16 1958 3.02 03-04-1985
Apr 7.79 1950 0.80 1946 3.55 04-24-1950
May 11.94 1995 0.37 1992 4.60 05-13-1999
Jun 11.01 1990 0.58 1936 5.46 06-20-1964
Jul 12.61 1992 0.30 1945 4.85 07-22-1951
Aug 9.16 1997 0.53 1974 3.15 08-24-1989
Sep 14.07 1970 0.00 1979 3.50 09-28-1999
Oct 9.08 1941 0.01 1964 3.95 10-03-1986
Nov 10.62 1985 0.16 1999 2.81 11-19-1985
Dec 6.59 1982 0.19 1976 3.10 12-02-1982
             
Annual 50.17 1970 19.70 1930 5.46 06-20-1964
Winter 13.08 2000 1.02 1961 5.00 01-20-2000
Spring 18.33 1984 3.85 2005 4.60 05-13-1999
Summer 22.31 1993 3.39 1936 5.46 06-20-1964
Fall 19.27 1970 2.77 1943 3.95 10-03-1986

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 6.7 4.2 1.3 0.5
Feb 5.2 3.3 1.3 0.3
Mar 8.6 6.2 2.0 0.8
Apr 9.9 7.4 2.6 0.9
May 11.2 8.0 2.7 1.1
Jun 9.2 7.0 2.8 1.0
Jul 9.0 6.7 2.6 1.0
Aug 9.0 6.7 2.4 0.9
Sep 7.8 5.6 2.2 0.9
Oct 8.4 5.8 1.9 0.5
Nov 8.6 6.0 2.2 0.7
Dec 7.3 5.3 1.6 0.7
         
Annual 100.8 72.1 25.8 9.2
Winter 19.1 12.8 4.3 1.5
Spring 29.7 21.5 7.4 2.8
Summer 27.1 20.4 7.7 2.9
Fall 24.8 17.4 6.3 2.0

Temperature Summary

Station 117004 PRINCEVILLE 2W, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 30.4 36.7 49.7 63.2 73.4 81.8 84.9 82.5 76.1 64.7 49.2 35.8 60.7
Low °F 9.5 14.8 25.5 36.6 47.5 57.3 60.6 58.5 49.4 38.5 27.0 16.0 36.8
Mean °F 20.0 25.8 37.6 49.9 60.5 69.6 72.8 70.5 62.8 51.6 38.1 25.9 48.8
HDD 1396 1099 849 463 203 32 10 35 137 427 807 1212 6670
CDD 0 0 0 8 62 168 250 205 70 12 0 0 775

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

Temperature Extremes

Period of Record: 1905-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 35.1 2006 7.2 1979 65 01-05-1997 -26 01-21-1984
Feb 38.0 1998 12.6 1979 72 02-27-1996 -27 02-13-1905
Mar 46.2 1973 28.0 1965 87 03-30-1986 -8 03-04-2002
Apr 58.3 1977 43.7 1993 93 04-25-1986 5 04-07-1982
May 68.9 1977 55.4 1995 95 05-30-2006 22 05-10-1966
Jun 76.3 1971 62.9 1982 101 06-26-1988 35 06-01-1993
Jul 77.8 1980 68.8 1996 104 07-28-1983 44 07-05-1979
Aug 77.0 1983 64.7 1992 105 08-02-1988 36 08-28-1986
Sep 70.0 1971 57.5 1993 99 09-09-1983 26 09-23-1983
Oct 62.2 1971 44.6 1987 92 10-04-2006 12 10-30-1988
Nov 49.9 2001 30.2 1995 82 11-09-1999 -3 11-26-1977
Dec 36.7 1965 11.1 1983 70 12-29-1984 -26 12-24-1983
                 
Annual 53.2 1998 45.5 1996 105 08-02-1988 -27 02-13-1905
Winter 32.1 1983 14.8 1979 72 02-27-1996 -27 02-13-1905
Spring 57.2 1977 43.0 1996 95 05-30-1906 -8 03-04-1902
Summer 75.4 1983 67.0 1992 105 08-02-1988 35 06-01-1993
Fall 58.1 1971 46.7 1995 99 09-09-1983 -3 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 16.6 30.0 7.7
Feb 0.0 10.6 25.4 4.4
Mar 0.0 3.2 22.2 0.3
Apr 0.1 0.1 9.9 0.0
May 0.6 0.0 0.8 0.0
Jun 4.0 0.0 0.0 0.0
Jul 7.8 0.0 0.0 0.0
Aug 5.2 0.0 0.0 0.0
Sep 1.9 0.0 0.8 0.0
Oct 0.0 0.0 8.1 0.0
Nov 0.0 2.0 20.1 0.2
Dec 0.0 10.8 28.6 4.1
         
Annual 19.6 43.3 145.9 16.8
Winter 0.0 38.0 84.0 16.3
Spring 0.7 3.4 33.0 0.3
Summer 16.9 0.0 0.0 0.0
Fall 2.0 2.0 29.0 0.2

Snowfall Summary

Station: 117004 PRINCEVILLE 2W, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 6.5 5.5 2.5 0.4 0.0 0.0 0.0 0.0 0.0 0.1 2.0 6.3 23.3

Snowfall Extremes

Period of Record: 1905-2006

Month High (in) Year 1-Day Max (in) Date
Jan 24.0 1982 8.0 01-31-2002
Feb 16.3 1989 8.0 02-11-1988
Mar 13.2 1960 6.0 03-25-1957
Apr 9.0 1970 8.0 04-01-1970
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 3.5 1967 3.5 10-27-1967
Nov 13.5 1975 10.0 11-27-1975
Dec 21.7 2000 10.4 12-01-2006
Season (Jul-Jun) 44.3 1956-1957 10.4 12-01-2006

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 1.9 1.2 0.4
Feb 2.4 1.9 1.2 0.4
Mar 1.3 0.9 0.5 0.1
Apr 0.2 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 0.1 0.1 0.0 0.0
Nov 1.1 0.8 0.4 0.1
Dec 2.8 2.2 1.5 0.4
Annual 10.8 8.2 5.1 1.2

Growing Season Summary

Station: 117004 PRINCEVILLE 2W, 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 5 21 114 325 642 888 1026 958 708 394 113 16 5139
45 1 7 63 211 489 738 872 803 560 263 60 6 4018
50 0 1 33 122 343 588 717 649 415 158 28 2 3017
55 0 0 13 61 215 439 563 495 280 83 10 0 2133
60 0 0 4 27 117 297 409 343 169 35 2 0 1385
50** 4 16 83 214 403 584 685 633 456 253 71 10 3369

**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 4/27 3/28 4/12 5/13 5/29 10/05 9/19 9/22 10/26 11/04
30 4/22 3/26 4/07 5/08 5/10 10/07 9/19 9/23 11/05 11/13
28 4/13 3/25 3/30 4/29 5/08 10/12 9/21 9/27 11/06 11/13
24 4/05 2/22 3/21 4/21 5/08 11/03 10/02 10/13 11/16 11/20
20 3/29 2/22 3/15 4/16 4/22 11/10 10/20 10/23 11/30 1/01
16 3/15 2/07 2/19 4/09 4/11 11/17 10/24 11/02 12/06 1/01

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 160 124 135 192 204
30 170 135 148 209 214
28 180 138 153 212 216
24 211 169 182 236 256
20 221 190 201 257 293
16 253 205 219 279 294

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