Historical Climate Data

Precipitation Summary

Station: 110442 BARRINGTON 3SW, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.56 1.38 2.33 3.66 4.02 4.27 3.80 4.58 3.32 2.62 2.93 2.09 36.56

Precipitation Extremes

Period of Record: 1962-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 4.86 1999 0.03 1981 1.67 01-01-1985
Feb 5.47 1997 0.00 1990 3.10 02-21-1997
Mar 5.39 2004 0.39 1989 1.93 03-13-2006
Apr 8.57 1999 0.77 1990 2.26 04-27-1995
May 9.25 1996 0.28 1992 2.52 05-20-1996
Jun 9.18 1993 0.53 2005 2.90 06-09-1979
Jul 7.40 1964 0.77 1990 3.87 07-18-1964
Aug 11.01 2002 0.54 1969 5.36 08-22-2002
Sep 9.63 1986 0.02 1979 4.17 09-23-1986
Oct 7.94 1991 0.06 1964 2.89 10-05-1991
Nov 7.59 1985 0.31 1989 2.12 11-11-1995
Dec 6.19 1982 0.20 1989 2.10 12-03-1982
             
Annual 47.93 1983 19.25 1989 5.36 08-22-2002
Winter 9.45 1997 1.24 1977 3.10 02-21-1997
Spring 17.28 1983 1.61 1989 2.52 05-20-1996
Summer 19.20 1981 4.73 1991 5.36 08-22-2002
Fall 15.33 2001 4.21 1989 4.17 09-23-1986

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 8.5 4.4 0.8 0.3
Feb 7.0 3.9 0.7 0.1
Mar 9.5 5.5 1.2 0.4
Apr 10.5 6.8 2.7 1.1
May 10.5 6.8 3.0 1.0
Jun 10.4 7.5 3.0 1.1
Jul 9.0 6.4 2.3 1.2
Aug 9.4 6.8 3.1 1.4
Sep 8.6 5.5 2.0 0.9
Oct 8.4 5.0 1.7 0.6
Nov 10.4 5.9 1.7 0.6
Dec 9.8 5.3 1.0 0.4
         
Annual 112.0 69.9 23.6 9.1
Winter 25.2 13.5 2.5 0.8
Spring 30.5 19.1 7.0 2.5
Summer 28.9 20.6 8.4 3.7
Fall 27.2 16.4 5.4 2.0

Temperature Summary

Station 110442 BARRINGTON 3SW, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 27.2 32.7 43.9 57.0 69.3 78.8 82.3 80.0 72.6 60.7 45.6 32.4 56.9
Low °F 9.6 14.7 25.1 36.1 46.5 56.7 61.8 59.6 50.5 39.2 28.6 17.0 37.1
Mean °F 18.4 23.7 34.5 46.6 57.9 67.8 72.1 69.8 61.6 50.0 37.1 24.7 47.0
HDD 1444 1157 945 555 261 50 6 30 146 470 837 1248 7149
CDD 0 0 0 1 41 133 224 179 42 4 0 0 624

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 32.7 2006 5.4 1977 62 01-24-1967 -26 01-11-1979
Feb 32.2 1984 13.1 1979 69 02-26-2000 -21 02-06-1977
Mar 43.3 2000 25.6 1965 83 03-30-1986 -9 03-04-2002
Apr 52.5 1985 42.2 1982 89 04-30-1970 5 04-07-1982
May 65.2 1977 53.1 2002 93 05-19-1975 22 05-10-1966
Jun 75.2 1971 62.3 1982 102 06-28-1971 35 06-01-1993
Jul 76.5 1983 69.2 1967 103 07-10-1974 38 07-01-1965
Aug 75.6 1988 65.6 2004 100 08-02-1988 38 08-29-1965
Sep 67.6 1971 57.8 1975 96 09-08-1971 25 09-29-1964
Oct 61.6 1963 44.9 1987 88 10-01-1971 14 10-30-1988
Nov 46.8 2001 29.2 1976 75 11-01-1968 -10 11-30-1976
Dec 34.8 1965 13.9 1983 66 12-03-1982 -20 12-24-1983
                 
Annual 58.4 1971 45.1 1976 103 07-10-1974 -26 01-11-1979
Winter 30.1 1983 13.8 1977 69 02-26-1900 -26 01-11-1979
Spring 52.9 1977 42.7 1984 93 05-19-1975 -9 03-04-1902
Summer 73.8 1983 66.8 2004 103 07-10-1974 35 06-01-1993
Fall 56.1 1963 44.8 1976 96 09-08-1971 -10 11-30-1976

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 19.0 30.1 8.4
Feb 0.0 13.8 26.2 5.7
Mar 0.0 4.9 22.4 0.4
Apr 0.0 0.2 9.0 0.0
May 0.3 0.0 1.5 0.0
Jun 3.2 0.0 0.0 0.0
Jul 5.5 0.0 0.0 0.0
Aug 3.4 0.0 0.0 0.0
Sep 0.9 0.0 0.4 0.0
Oct 0.0 0.0 7.2 0.0
Nov 0.0 2.9 19.3 0.2
Dec 0.0 13.5 28.7 4.6
         
Annual 13.3 53.6 142.8 19.2
Winter 0.0 46.3 85.0 18.7
Spring 0.3 5.0 32.4 0.4
Summer 12.0 0.0 0.0 0.0
Fall 0.9 2.7 26.0 0.2

Snowfall Summary

Station: 110442 BARRINGTON 3SW, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 10.7 7.1 3.8 0.8 0.0 0.0 0.0 0.0 0.0 0.1 2.0 8.7 33.2

Snowfall Extremes

Period of Record: 1962-2006

Month High (in) Year 1-Day Max (in) Date
Jan 32.5 1979 16.0 01-14-1979
Feb 16.7 1988 10.2 02-11-1988
Mar 23.5 1965 11.3 03-26-1970
Apr 10.0 1970 10.0 04-02-1970
May 1.0 1989 1.0 05-05-1989
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 4.2 1967 4.2 10-27-1967
Nov 7.0 1975 5.5 11-16-1997
Dec 28.4 2000 10.0 12-15-1987
Season (Jul-Jun) 72.5 1978-1979 16.0 01-14-1979

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 4.3 2.8 1.4 0.2
Feb 4.3 2.8 1.4 0.2
Mar 2.1 1.4 0.9 0.1
Apr 0.3 0.3 0.2 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 0.0 0.0 0.0
Nov 1.4 0.8 0.5 0.0
Dec 5.2 3.3 1.7 0.3
Annual 17.6 11.3 6.3 1.1

Growing Season Summary

Station: 110442 BARRINGTON 3SW, 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 10 74 268 561 834 1013 936 668 353 95 13 4673
45 0 2 36 165 412 687 858 783 521 227 47 5 3631
50 0 0 15 92 275 539 703 630 378 128 20 1 2705
55 0 0 5 49 164 395 548 477 248 61 6 0 1906
60 0 0 1 24 86 262 394 327 145 22 1 0 1231
50** 0 7 46 160 338 538 681 621 413 206 51 6 2976

**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 5/03 4/09 4/16 5/11 5/28 10/07 9/22 9/24 10/18 11/07
30 4/28 4/09 4/12 5/09 5/11 10/08 9/23 9/26 10/29 11/07
28 4/22 3/27 4/08 5/09 5/11 10/16 9/23 9/30 11/04 11/19
24 4/08 3/16 3/22 4/20 4/21 10/30 10/03 10/14 11/16 11/20
20 3/23 3/13 3/15 4/09 4/19 11/12 10/13 10/26 11/23 11/24
16 3/18 2/21 3/03 4/04 4/08 11/21 10/31 11/03 11/30 12/04

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 157 132 137 175 212
30 161 139 141 181 212
28 176 139 154 208 225
24 203 177 191 227 231
20 230 206 207 248 252
16 244 219 222 268 274

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