Precipitation Summary
Station: 110510 BELLEVILLE Southern Illinois University RESEARCH
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 |
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007