Historical Climate Data

Precipitation Summary

Station: 110510 BELLEVILLE SIU RESEARCH, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 2.02 2.20 3.54 3.91 4.18 3.97 3.51 3.34 2.98 2.87 3.88 2.97 39.37

Precipitation Extremes

Period of Record: 1948-2006


Month

High (in)

Year

Low (in)

Year
1-Day
Max (in)

Date
Jan 9.12 1950 0.05 1986 3.58 01-03-1950
Feb 7.98 1986 0.31 1958 4.48 02-02-1986
Mar 6.53 1977 0.88 2001 2.51 03-28-1977
Apr 11.46 1994 0.90 1977 4.58 04-29-1996
May 17.02 1995 0.82 2005 4.57 05-17-1995
Jun 17.16 1957 0.88 1959 8.15 06-15-1957
Jul 9.16 1969 0.60 1974 3.93 07-28-1979
Aug 6.95 1974 0.18 1969 3.51 08-10-1961
Sep 9.49 2005 0.08 2004 3.75 09-14-1989
Oct 7.70 1983 0.30 1952 3.39 10-20-1983
Nov 10.92 1972 0.16 1980 3.80 11-02-1972
Dec 9.35 1982 0.09 1955 3.97 12-03-1982
             
Annual 56.62 1957 20.56 1953 8.15 06-15-1957
Winter 18.65 1950 2.24 1980 4.48 02-02-1986
Spring 24.68 1995 6.04 2005 4.58 04-29-1996
Summer 23.83 1957 4.12 1971 8.15 06-15-1957
Fall 17.96 1993 3.29 1953 3.80 11-02-1972


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 6.5 4.1 1.3 0.5
Feb 5.3 3.7 1.4 0.5
Mar 8.5 6.8 2.5 1.0
Apr 9.3 6.8 2.7 0.9
May 9.7 7.2 3.1 1.0
Jun 8.2 6.6 2.7 1.3
Jul 6.9 5.2 2.2 1.0
Aug 7.0 5.2 2.4 1.0
Sep 6.2 4.6 2.0 0.9
Oct 7.3 5.1 2.2 0.8
Nov 7.4 6.0 2.6 1.1
Dec 6.9 5.0 2.0 0.6
         
Annual 89.3 66.4 27.1 10.6
Winter 18.7 12.9 4.7 1.6
Spring 27.5 20.8 8.4 2.8
Summer 22.2 17.1 7.3 3.3
Fall 21.0 15.7 6.7 2.8


Temperature Summary

Station 110510 BELLEVILLE SIU RESEARCH, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 39.6 46.1 57.2 68.0 77.3 85.7 89.6 87.8 81.6 71.0 56.0 43.7 67.0
Low °F 22.1 26.7 35.5 44.6 53.9 62.5 66.5 63.7 56.0 45.0 36.1 26.5 44.9
Mean °F 30.9 36.4 46.4 56.3 65.6 74.1 78.1 75.8 68.8 58.0 46.1 35.1 56.0
HDD 1059 801 579 277 104 6 0 5 39 246 568 928 4612
CDD 0 0 0 16 121 280 404 338 151 29 0 0 1339

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


Temperature Extremes

Period of Record: 1948-2006


Month
High
Mean °F

Year
Low
Mean °F

Year
1-Day
Max °F

Date
1-Day
Min °F

Date
Jan 44.5 2006 15.9 1977 75 01-24-1950 -27 01-17-1977
Feb 45.3 2000 22.3 1978 81 02-13-1962 -21 02-10-1982
Mar 52.8 1973 30.9 1960 89 03-21-1997 -8 03-05-1978
Apr 63.8 2006 50.2 1983 91 04-14-2006 19 04-07-1971
May 71.5 1962 58.6 1961 97 05-26-1953 28 05-04-1976
Jun 82.4 1952 69.5 1982 104 06-29-1952 38 06-01-1972
Jul 83.6 1954 71.8 1967 110 07-14-1954 43 07-06-1972
Aug 81.9 1995 69.9 1967 104 08-03-1964 39 08-29-1986
Sep 74.2 2005 63.4 1974 103 09-05-1954 26 09-23-1995
Oct 65.6 1963 51.6 1976 95 10-02-1953 20 10-28-1976
Nov 54.2 1999 38.3 1950 84 11-01-1950 2 11-08-1991
Dec 43.0 1965 22.3 1989 76 12-03-1970 -19 12-22-1989
                 
Annual 59.5 2006 53.3 1979 110 07-14-1954 -27 01-17-1977
Winter 40.5 1992 25.4 1978 81 02-13-1962 -27 01-17-1977
Spring 60.4 1977 50.3 1960 97 05-26-1953 -8 03-05-1978
Summer 80.6 1954 71.7 1967 110 07-14-1954 38 06-01-1972
Fall 61.9 2005 52.1 1976 103 09-05-1954 2 11-08-1991


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 9.2 25.1 1.7
Feb 0.0 5.2 19.2 1.0
Mar 0.0 0.7 13.1 0.1
Apr 0.1 0.0 4.1 0.0
May 1.1 0.0 0.1 0.0
Jun 9.1 0.0 0.0 0.0
Jul 16.1 0.0 0.0 0.0
Aug 12.4 0.0 0.0 0.0
Sep 5.2 0.0 0.4 0.0
Oct 0.2 0.0 4.1 0.0
Nov 0.0 0.3 12.2 0.0
Dec 0.0 5.0 21.9 1.0
         
Annual 44.1 20.4 100.3 3.8
Winter 0.0 19.4 66.2 3.8
Spring 1.2 0.7 17.4 0.1
Summer 37.6 0.0 0.0 0.0
Fall 5.3 0.3 16.8 0.0


Snowfall Summary

Station: 110510 BELLEVILLE SIU RESEARCH, IL


1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 6.1 2.9 2.3 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.9 3.6 16.6

Snowfall Extremes

Period of Record: 1948-2006

Month High (in) Year 1-Day Max (in) Date
Jan 19.5 1979 14.8 01-31-1982
Feb 19.0 1993 11.0 02-25-1993
Mar 20.4 1960 8.0 03-24-1990
Apr 13.1 1971 7.8 04-06-1971
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 0.0 - - -
Nov 12.7 1951 9.7 11-06-1951
Dec 16.0 1973 8.5 12-13-2000
Season (Jul-Jun) 36.6 1981-1982 14.8 01-31-1982

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 1.2 0.8 0.6 0.2
Feb 1.2 0.8 0.6 0.2
Mar 0.8 0.7 0.5 0.2
Apr 0.2 0.2 0.2 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 0.0 0.0 0.0 0.0
Nov 0.4 0.3 0.2 0.1
Dec 1.8 1.3 0.8 0.2
Annual 7.1 5.0 3.3 0.9


Growing Season Summary

Station: 110510 BELLEVILLE SIU RESEARCH, 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 41 94 257 498 795 1028 1183 1110 865 560 236 69 6727
45 17 47 159 358 641 878 1029 955 716 413 146 32 5384
50 6 19 90 236 487 729 874 801 568 280 80 14 4180
55 1 7 44 139 340 579 719 647 422 169 37 5 3108
60 0 2 18 69 210 429 565 492 286 86 13 1 2172
50** 25 60 160 308 515 698 806 752 573 364 138 39 4434

**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 4/12 3/25 4/01 5/01 5/10 10/12 9/19 9/23 11/04 11/10
30 4/09 3/24 3/26 4/26 5/05 10/20 9/22 10/02 11/04 11/12
28 4/06 3/07 3/20 4/19 5/05 10/23 9/22 10/02 11/09 11/13
24 3/23 2/28 3/05 4/07 4/11 11/06 10/13 10/22 11/24 12/04
20 3/13 2/15 2/24 3/27 4/07 11/21 10/24 11/03 12/12 1/02
16 2/17 1/10 1/31 3/21 3/25 12/07 11/03 11/10 12/22 1/02

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 179 151 162 204 215
30 189 159 168 212 224
28 199 164 174 224 249
24 226 200 204 256 276
20 251 214 232 288 310
16 289 229 246 316 324

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