Historical Climate Data

Precipitation Summary

Station: 116661 PAW PAW 2 NW, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.39 1.26 2.34 3.47 4.23 4.40 3.77 4.17 3.81 2.76 3.00 2.16 36.76

Precipitation Extremes

Period of Record: 1912-2006


Month

High (in)

Year

Low (in)

Year
1-Day
Max (in)

Date
Jan 4.63 1916 0.00 1956 3.50 01-24-1938
Feb 5.46 1997 0.00 1987 2.95 02-21-1997
Mar 5.72 1920 0.30 1958 3.35 03-25-1954
Apr 7.48 1947 0.32 1915 2.97 04-28-1959
May 8.68 2004 0.45 1934 3.88 05-10-1951
Jun 11.46 1993 0.24 1988 6.92 06-24-1994
Jul 10.50 1982 0.26 1916 5.46 07-10-2000
Aug 12.58 1987 0.17 2003 4.55 08-27-1965
Sep 13.17 1970 0.44 1956 5.24 09-10-1992
Oct 10.61 1954 0.00 1964 4.06 10-11-1954
Nov 9.02 1985 0.23 1976 2.85 11-17-1928
Dec 6.79 1982 0.17 1943 3.77 12-03-1982
             
Annual 50.47 1951 19.51 2005 6.92 06-24-1994
Winter 9.04 1950 1.36 1931 3.77 12-03-1982
Spring 14.40 1973 3.83 2005 3.88 05-10-1951
Summer 21.16 1972 3.42 1976 6.92 06-24-1994
Fall 18.49 1941 2.66 1956 5.24 09-10-1992


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 7.0 3.8 0.7 0.2
Feb 5.7 3.0 0.7 0.1
Mar 8.6 5.8 1.2 0.3
Apr 10.7 7.5 2.3 0.8
May 10.6 7.8 3.1 1.2
Jun 9.6 7.1 2.7 1.0
Jul 8.9 6.1 2.2 1.0
Aug 9.5 6.5 2.8 1.1
Sep 8.5 5.9 2.6 1.0
Oct 8.1 5.1 1.8 0.6
Nov 8.9 6.1 1.9 0.7
Dec 8.3 5.2 1.1 0.4
         
Annual 104.6 69.9 23.1 8.5
Winter 21.1 12.0 2.5 0.7
Spring 30.1 21.2 6.7 2.3
Summer 28.1 19.7 7.7 3.1
Fall 25.4 17.1 6.2 2.4


Temperature Summary

Station 116661 PAW PAW 2 NW, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 25.3 30.9 43.2 57.4 69.7 79.2 82.1 79.8 73.3 61.3 44.7 30.8 56.5
Low °F 7.7 13.3 24.6 35.8 47.2 56.4 60.4 58.0 49.5 37.7 26.2 14.0 35.9
Mean °F 16.5 22.1 33.9 46.6 58.5 67.8 71.3 68.9 61.4 49.5 35.5 22.4 46.2
HDD 1503 1202 964 553 254 42 12 41 147 483 887 1320 7408
CDD 0 0 0 1 50 125 204 162 39 3 0 0 584

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


Temperature Extremes

Period of Record: 1962-2006


Month
High
Mean °F

Year
Low
Mean °F

Year
1-Day
Max °F

Date
1-Day
Min °F

Date
Jan 31.9 2006 6.2 1977 64 01-25-1967 -25 01-11-1979
Feb 34.5 1998 10.6 1979 68 02-28-1976 -33 02-03-1996
Mar 41.8 1973 25.4 1965 83 03-30-1986 -16 03-04-2002
Apr 54.7 1977 41.6 1975 92 04-19-2002 9 04-07-1982
May 67.5 1977 52.0 1997 94 05-20-1975 24 05-03-2005
Jun 73.1 2005 63.5 1982 101 06-26-1988 36 06-10-1972
Jul 76.6 1966 66.3 2000 101 07-11-1966 41 07-23-2000
Aug 75.7 1988 64.6 1992 99 08-18-1988 37 08-28-1986
Sep 67.8 2005 58.0 1975 93 09-09-1978 29 09-23-1995
Oct 60.8 1963 44.5 1987 88 10-07-1963 16 10-26-1962
Nov 47.0 2001 26.8 1995 76 11-01-1968 -7 11-29-1976
Dec 33.4 1982 9.1 2000 65 12-03-1982 -23 12-24-1983
                 
Annual 50.4 1998 42.1 1984 101 06-26-1988 -33 02-03-1996
Winter 28.8 2002 12.3 1979 68 02-28-1976 -33 02-03-1996
Spring 54.3 1977 40.2 1996 94 05-20-1975 -16 03-04-1902
Summer 74.2 1988 66.1 2000 101 06-26-1988 36 06-10-1972
Fall 55.4 1971 45.2 1995 93 09-09-1978 -7 11-29-1976


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 21.0 30.4 8.4
Feb 0.0 14.6 26.4 4.8
Mar 0.0 5.5 24.6 0.4
Apr 0.1 0.3 10.1 0.0
May 0.5 0.0 1.1 0.0
Jun 2.7 0.0 0.0 0.0
Jul 4.1 0.0 0.0 0.0
Aug 1.9 0.0 0.0 0.0
Sep 0.6 0.0 0.2 0.0
Oct 0.0 0.0 7.1 0.0
Nov 0.0 4.2 20.6 0.2
Dec 0.0 15.9 29.5 4.6
         
Annual 9.8 61.8 150.8 18.4
Winter 0.0 51.4 86.3 17.7
Spring 0.5 5.7 35.4 0.4
Summer 8.7 0.0 0.0 0.0
Fall 0.6 4.2 28.2 0.2


Snowfall Summary

Station: 116661 PAW PAW 2 NW, IL


1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 9.0 5.9 4.0 1.0 0.0 0.0 0.0 0.0 0.0 0.2 2.4 8.3 30.8

Snowfall Extremes

Period of Record: 1912-2006

Month High (in) Year 1-Day Max (in) Date
Jan 31.5 1979 14.0 01-27-1967
Feb 19.8 1994 8.0 02-11-1988
Mar 20.3 1972 9.3 03-20-1967
Apr 11.0 1975 10.0 04-03-1975
May 1.0 1966 1.0 05-11-1966
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 4.0 1967 4.0 10-27-1967
Nov 11.0 1971 7.0 11-07-1951
Dec 27.0 1951 10.0 12-15-1987
Season (Jul-Jun) 72.5 1978-1979 14.0 01-27-1967

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 3.3 2.4 1.3 0.2
Feb 3.3 2.4 1.3 0.2
Mar 2.0 1.3 0.7 0.2
Apr 0.4 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 1.3 1.0 0.5 0.1
Dec 4.5 3.3 1.7 0.3
Annual 16.7 12.1 6.4 1.1


Growing Season Summary

Station: 116661 PAW PAW 2 NW, 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 1 9 68 245 581 848 994 919 680 340 81 9 4701
45 0 1 35 144 432 700 840 765 531 216 38 3 3648
50 0 0 15 74 294 552 686 611 385 121 16 1 2716
55 0 0 5 35 179 406 531 458 251 57 4 0 1901
60 0 0 2 14 96 268 378 306 144 21 0 0 1213
50** 0 5 45 150 349 550 669 605 420 204 46 5 3004

**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 5/01 3/30 4/12 5/12 5/25 10/10 9/22 9/25 10/26 11/04
30 4/22 3/28 4/05 5/09 5/13 10/17 9/22 9/26 11/03 11/11
28 4/13 3/24 4/02 5/05 5/11 10/19 10/02 10/05 11/05 11/19
24 4/07 3/15 3/24 4/15 4/22 11/02 10/02 10/14 11/13 11/20
20 3/22 2/26 3/15 4/08 4/10 11/11 10/20 10/26 11/29 12/08
16 3/14 2/09 2/24 4/07 4/09 11/20 11/03 11/07 12/09 12/22

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 166 138 143 186 201
30 179 138 148 203 213
28 191 148 160 211 225
24 208 176 191 224 241
20 232 195 211 255 277
16 255 214 218 280 294

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