Precipitation Summary
Station: 111280 CARLINVILLE, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prec. (in) | 1.96 | 1.95 | 3.54 | 3.95 | 4.25 | 3.89 | 3.66 | 3.34 | 2.88 | 2.67 | 3.63 | 2.87 | 38.59 |
Precipitation Extremes
Period of Record: 1891-2006
| Month | High (in) | Year | Low (in) | Year | 1-Day Max (in) |
Date |
|---|---|---|---|---|---|---|
| Jan | 7.26 | 2005 | 0.00 | 1895 | 2.93 | 01-10-1975 |
| Feb | 5.62 | 1951 | 0.11 | 1947 | 2.23 | 02-06-1942 |
| Mar | 8.72 | 1922 | 0.15 | 1910 | 3.97 | 03-14-1922 |
| Apr | 11.46 | 1994 | 0.44 | 2004 | 4.14 | 04-11-1979 |
| May | 10.90 | 1943 | 0.13 | 1934 | 2.77 | 05-24-1927 |
| Jun | 10.86 | 1945 | 0.11 | 1933 | 5.26 | 06-28-1957 |
| Jul | 11.59 | 1942 | 0.26 | 1936 | 6.22 | 07-08-1942 |
| Aug | 11.09 | 1915 | 0.05 | 1971 | 5.00 | 08-20-1915 |
| Sep | 12.26 | 1926 | 0.00 | 1897 | 3.96 | 09-19-1966 |
| Oct | 8.88 | 1941 | 0.21 | 1897 | 4.81 | 10-12-1969 |
| Nov | 8.91 | 1985 | 0.08 | 1904 | 4.08 | 11-01-1946 |
| Dec | 7.85 | 1990 | 0.13 | 1955 | 3.75 | 12-03-1982 |
| Annual | 58.14 | 1927 | 21.94 | 1976 | 6.22 | 07-08-1942 |
| Winter | 13.23 | 1950 | 1.68 | 1963 | 3.75 | 12-03-1982 |
| Spring | 22.89 | 1927 | 3.45 | 2005 | 4.14 | 04-11-1979 |
| Summer | 23.92 | 1942 | 3.19 | 1933 | 6.22 | 07-08-1942 |
| Fall | 21.42 | 1926 | 2.88 | 1956 | 4.81 | 10-12-1969 |
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 | 8.6 | 4.9 | 1.0 | 0.3 |
| Feb | 7.8 | 4.3 | 1.2 | 0.3 |
| Mar | 11.1 | 7.4 | 2.4 | 0.7 |
| Apr | 11.4 | 7.3 | 2.5 | 0.9 |
| May | 11.6 | 7.4 | 3.0 | 1.1 |
| Jun | 9.4 | 6.4 | 2.7 | 1.0 |
| Jul | 8.9 | 5.4 | 2.6 | 1.1 |
| Aug | 8.1 | 5.2 | 2.5 | 0.8 |
| Sep | 8.0 | 4.9 | 2.2 | 0.8 |
| Oct | 9.2 | 5.8 | 1.8 | 0.4 |
| Nov | 10.3 | 6.6 | 2.6 | 0.8 |
| Dec | 9.1 | 5.3 | 1.8 | 0.7 |
| Annual | 113.7 | 70.9 | 26.3 | 8.7 |
| Winter | 25.5 | 14.5 | 3.9 | 1.3 |
| Spring | 34.1 | 22.1 | 7.9 | 2.6 |
| Summer | 26.5 | 16.9 | 7.8 | 2.9 |
| Fall | 27.4 | 17.3 | 6.7 | 1.9 |
Temperature Summary
Station 111280 CARLINVILLE, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 34.9 | 41.2 | 52.9 | 65.1 | 75.0 | 83.5 | 87.3 | 85.6 | 79.1 | 67.7 | 52.2 | 39.6 | 63.7 |
| Low °F | 17.4 | 22.0 | 31.9 | 43.0 | 52.8 | 62.1 | 66.6 | 64.4 | 55.7 | 44.5 | 33.4 | 23.4 | 43.1 |
| Mean °F | 26.2 | 31.6 | 42.4 | 54.1 | 63.9 | 72.8 | 77.0 | 75.0 | 67.4 | 56.1 | 42.8 | 31.5 | 53.4 |
| HDD | 1204 | 936 | 701 | 340 | 130 | 8 | 0 | 7 | 60 | 292 | 667 | 1039 | 5384 |
| CDD | 0 | 0 | 0 | 12 | 95 | 242 | 370 | 317 | 132 | 16 | 0 | 0 | 1184 |
HDD – heating degree days (base 65F); CDD – cooling degree days (base 65F)
Temperature Extremes
Period of Record: 1893-2006
| Month | High Mean °F |
Year | Low Mean °F |
Year | 1-Day Max °F |
Date | 1-Day Min °F |
Date |
|---|---|---|---|---|---|---|---|---|
| Jan | 40.7 | 1933 | 13.5 | 1977 | 74 | 01-23-1909 | -22 | 01-07-1912 |
| Feb | 42.5 | 1976 | 20.0 | 1978 | 82 | 02-24-1930 | -23 | 02-13-1905 |
| Mar | 54.6 | 1910 | 28.5 | 1960 | 91 | 03-21-1907 | -12 | 03-06-1960 |
| Apr | 62.2 | 1896 | 45.9 | 1907 | 92 | 04-10-1930 | 16 | 04-05-1920 |
| May | 71.9 | 1962 | 57.7 | 1924 | 99 | 05-30-1934 | 26 | 05-10-1966 |
| Jun | 80.2 | 1934 | 67.0 | 1928 | 106 | 06-19-1913 | 37 | 06-16-1917 |
| Jul | 85.6 | 1936 | 72.1 | 1924 | 113 | 07-24-1934 | 44 | 07-23-1947 |
| Aug | 84.2 | 1936 | 68.4 | 1915 | 110 | 08-04-1918 | 38 | 08-21-1950 |
| Sep | 75.6 | 1931 | 60.7 | 1918 | 105 | 09-01-1913 | 25 | 09-30-1899 |
| Oct | 66.2 | 1963 | 47.9 | 1917 | 95 | 10-02-1953 | 14 | 10-30-1925 |
| Nov | 53.1 | 1909 | 35.9 | 1996 | 84 | 11-01-1950 | -4 | 11-30-1929 |
| Dec | 42.1 | 1931 | 19.2 | 1983 | 74 | 12-15-1948 | -20 | 12-22-1989 |
| Annual | 60.1 | 2004 | 51.3 | 1917 | 113 | 07-24-1934 | -23 | 02-13-1905 |
| Winter | 40.3 | 1932 | 22.9 | 1978 | 82 | 02-24-1930 | -23 | 02-13-1905 |
| Spring | 59.4 | 1977 | 48.7 | 1960 | 99 | 05-30-1934 | -12 | 03-06-1960 |
| Summer | 81.3 | 1936 | 70.5 | 1915 | 113 | 07-24-1934 | 37 | 06-16-1917 |
| Fall | 63.1 | 1931 | 51.3 | 1976 | 105 | 09-01-1913 | -4 | 11-30-1929 |
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 | 12.6 | 27.1 | 3.0 |
| Feb | 0.0 | 7.1 | 21.3 | 1.6 |
| Mar | 0.0 | 1.2 | 15.1 | 0.1 |
| Apr | 0.0 | 0.0 | 4.2 | 0.0 |
| May | 0.7 | 0.0 | 0.2 | 0.0 |
| Jun | 6.4 | 0.0 | 0.0 | 0.0 |
| Jul | 13.0 | 0.0 | 0.0 | 0.0 |
| Aug | 8.9 | 0.0 | 0.0 | 0.0 |
| Sep | 3.4 | 0.0 | 0.2 | 0.0 |
| Oct | 0.1 | 0.0 | 3.4 | 0.0 |
| Nov | 0.0 | 1.1 | 13.1 | 0.0 |
| Dec | 0.0 | 6.9 | 23.5 | 1.3 |
| Annual | 32.3 | 28.8 | 108.4 | 6.0 |
| Winter | 0.0 | 26.5 | 71.8 | 5.9 |
| Spring | 0.8 | 1.2 | 19.6 | 0.1 |
| Summer | 28.2 | 0.0 | 0.0 | 0.0 |
| Fall | 3.5 | 1.1 | 16.7 | 0.0 |
Snowfall Summary
Station: 111280 CARLINVILLE, IL
1971-2000 Averages
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow (in) | 7.0 | 4.2 | 3.4 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.4 | 4.0 | 20.7 |
Snowfall Extremes
Period of Record: 1891-2006
| Month | High (in) | Year | 1-Day Max (in) | Date |
|---|---|---|---|---|
| Jan | 25.4 | 1977 | 8.5 | 01-31-1982 |
| Feb | 22.5 | 1914 | 14.0 | 02-13-1914 |
| Mar | 22.3 | 1978 | 10.0 | 03-19-1906 |
| Apr | 8.5 | 1971 | 6.0 | 04-05-1971 |
| May | 3.0 | 1929 | 3.0 | 05-02-1929 |
| Jun | 0.0 | – | – | – |
| Jul | 0.0 | – | – | – |
| Aug | 0.0 | – | – | – |
| Sep | 0.0 | – | – | – |
| Oct | 2.0 | 1929 | 2.0 | 10-23-1929 |
| Nov | 9.7 | 1951 | 9.5 | 11-06-1951 |
| Dec | 25.5 | 1973 | 10.5 | 12-19-1973 |
| Season (Jul-Jun) | 49.4 | 1977-1978 | 14.0 | 02-13-1914 |
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 | 2.7 | 1.1 | 0.7 | 0.2 |
| Feb | 2.7 | 1.1 | 0.7 | 0.2 |
| Mar | 1.6 | 1.1 | 0.6 | 0.2 |
| Apr | 0.3 | 0.2 | 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 | 0.0 | 0.0 | 0.0 | 0.0 |
| Nov | 0.6 | 0.4 | 0.3 | 0.1 |
| Dec | 2.4 | 1.3 | 0.7 | 0.2 |
| Annual | 12.2 | 6.6 | 3.6 | 1.1 |
Growing Season Summary
Station: 111280 CARLINVILLE, 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 | 21 | 62 | 200 | 452 | 762 | 1003 | 1153 | 1089 | 841 | 520 | 197 | 51 | 6336 |
| 45 | 7 | 29 | 118 | 319 | 607 | 853 | 998 | 934 | 691 | 374 | 117 | 24 | 5064 |
| 50 | 2 | 11 | 65 | 204 | 454 | 703 | 844 | 779 | 543 | 246 | 62 | 9 | 3917 |
| 55 | 0 | 3 | 31 | 116 | 310 | 553 | 689 | 624 | 398 | 141 | 27 | 3 | 2896 |
| 60 | 0 | 0 | 12 | 56 | 186 | 405 | 534 | 469 | 265 | 68 | 9 | 0 | 2007 |
| 50** | 11 | 37 | 122 | 274 | 484 | 680 | 791 | 741 | 551 | 319 | 109 | 26 | 4138 |
**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 | 4/13 | 3/24 | 3/30 | 5/03 | 5/08 | 10/11 | 9/23 | 9/23 | 10/25 | 11/10 |
| 30 | 4/07 | 3/23 | 3/27 | 4/30 | 5/08 | 10/21 | 10/02 | 10/07 | 11/05 | 11/10 |
| 28 | 4/06 | 3/18 | 3/22 | 4/18 | 4/21 | 10/26 | 10/02 | 10/10 | 11/11 | 11/23 |
| 24 | 3/22 | 3/06 | 3/10 | 4/10 | 4/18 | 11/08 | 10/13 | 10/21 | 12/01 | 12/11 |
| 20 | 3/14 | 2/03 | 2/24 | 3/27 | 4/09 | 11/21 | 10/24 | 11/07 | 12/10 | 12/22 |
| 16 | 3/06 | 1/15 | 2/05 | 3/20 | 3/25 | 12/01 | 11/02 | 11/09 | 12/22 | 1/01 |
Length of Growing Season (Days)
Derived from 1971-2000 Averages
| Temp °F | Median | Shortest | 10% | 90% | Longest |
|---|---|---|---|---|---|
| 32 | 182 | 137 | 160 | 202 | 205 |
| 30 | 192 | 159 | 170 | 221 | 228 |
| 28 | 206 | 172 | 185 | 229 | 234 |
| 24 | 228 | 191 | 202 | 257 | 271 |
| 20 | 253 | 221 | 229 | 282 | 288 |
| 16 | 272 | 228 | 239 | 305 | 340 |
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007