Precipitation Summary
Station: 116558 PALESTINE 2W, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prec. (in) | 2.45 | 2.58 | 3.80 | 4.00 | 4.67 | 3.81 | 4.24 | 3.76 | 3.50 | 3.03 | 3.85 | 3.15 | 42.84 |
Precipitation Extremes
Period of Record: 1892-2006
| Month | High (in) | Year | Low (in) | Year | 1-Day Max (in) |
Date |
|---|---|---|---|---|---|---|
| Jan | 12.01 | 1950 | 0.00 | 1892 | 3.62 | 01-30-1916 |
| Feb | 7.58 | 1950 | 0.08 | 1947 | 2.70 | 02-07-1999 |
| Mar | 11.45 | 1898 | 0.19 | 1910 | 4.75 | 03-05-1897 |
| Apr | 9.78 | 1892 | 0.95 | 1915 | 4.04 | 04-17-2006 |
| May | 11.23 | 1927 | 0.52 | 1903 | 4.00 | 05-08-1996 |
| Jun | 10.23 | 1945 | 0.64 | 1933 | 3.22 | 06-25-1938 |
| Jul | 12.56 | 1958 | 0.02 | 1930 | 6.10 | 07-11-1958 |
| Aug | 9.97 | 1906 | 0.01 | 1897 | 4.93 | 08-29-1951 |
| Sep | 11.52 | 1911 | 0.10 | 1995 | 4.35 | 09-10-2000 |
| Oct | 10.95 | 1919 | 0.10 | 1904 | 3.45 | 10-18-1905 |
| Nov | 11.41 | 1985 | 0.44 | 1999 | 4.11 | 11-14-1993 |
| Dec | 9.53 | 1918 | 0.18 | 1989 | 3.94 | 12-03-1982 |
| Annual | 59.09 | 1945 | 25.37 | 1954 | 6.10 | 07-11-1958 |
| Winter | 25.74 | 1950 | 3.29 | 1931 | 3.94 | 12-03-1982 |
| Spring | 23.00 | 1927 | 4.57 | 1987 | 4.75 | 03-05-1897 |
| Summer | 21.39 | 1958 | 3.63 | 1933 | 6.10 | 07-11-1958 |
| Fall | 18.40 | 1993 | 2.98 | 1999 | 4.35 | 09-10-2000 |
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 | 9.0 | 5.6 | 1.6 | 0.5 |
| Feb | 7.8 | 4.9 | 1.9 | 0.5 |
| Mar | 10.3 | 7.7 | 2.8 | 0.8 |
| Apr | 11.1 | 8.5 | 2.8 | 0.8 |
| May | 10.5 | 7.7 | 3.3 | 1.4 |
| Jun | 9.5 | 6.8 | 2.7 | 0.9 |
| Jul | 8.5 | 6.4 | 2.7 | 1.3 |
| Aug | 7.8 | 5.8 | 2.6 | 1.2 |
| Sep | 6.8 | 5.1 | 2.0 | 1.0 |
| Oct | 7.1 | 4.7 | 2.1 | 0.8 |
| Nov | 9.2 | 6.5 | 2.9 | 1.0 |
| Dec | 9.2 | 6.1 | 2.5 | 0.7 |
| Annual | 107.0 | 75.9 | 30.1 | 10.9 |
| Winter | 26.0 | 16.6 | 6.1 | 1.7 |
| Spring | 31.9 | 23.8 | 8.9 | 3.0 |
| Summer | 25.8 | 19.0 | 8.0 | 3.4 |
| Fall | 23.1 | 16.3 | 7.0 | 2.8 |
Temperature Summary
Station 116558 PALESTINE 2W, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 37.5 | 43.5 | 55.0 | 66.3 | 76.7 | 85.2 | 88.5 | 86.5 | 80.5 | 68.8 | 54.3 | 42.0 | 65.4 |
| Low °F | 20.9 | 25.8 | 35.3 | 44.3 | 54.4 | 63.5 | 67.0 | 64.8 | 56.8 | 45.4 | 36.5 | 26.2 | 45.1 |
| Mean °F | 29.2 | 34.7 | 45.2 | 55.3 | 65.6 | 74.4 | 77.8 | 75.7 | 68.7 | 57.1 | 45.4 | 34.1 | 55.3 |
| HDD | 1110 | 850 | 616 | 302 | 115 | 9 | 0 | 5 | 37 | 278 | 589 | 959 | 4870 |
| CDD | 0 | 0 | 0 | 11 | 131 | 288 | 395 | 335 | 148 | 33 | 1 | 0 | 1342 |
HDD – heating degree days (base 65F); CDD – cooling degree days (base 65F)
Temperature Extremes
Period of Record: 1892-2006
| Month | High Mean °F |
Year | Low Mean °F |
Year | 1-Day Max °F |
Date | 1-Day Min °F |
Date |
|---|---|---|---|---|---|---|---|---|
| Jan | 43.8 | 2006 | 13.3 | 1977 | 75 | 01-24-1943 | -21 | 01-20-1985 |
| Feb | 43.8 | 1930 | 19.2 | 1978 | 77 | 02-29-1972 | -27 | 02-13-1899 |
| Mar | 55.8 | 1946 | 28.8 | 1960 | 88 | 03-24-1929 | -12 | 03-06-1960 |
| Apr | 61.6 | 2001 | 45.7 | 1907 | 94 | 04-26-1989 | 18 | 04-01-2001 |
| May | 75.1 | 1987 | 57.4 | 1924 | 98 | 05-27-1911 | 28 | 05-01-1903 |
| Jun | 80.3 | 1953 | 64.5 | 1985 | 108 | 06-20-1953 | 34 | 06-10-1988 |
| Jul | 85.1 | 1936 | 69.6 | 1985 | 114 | 07-14-1954 | 38 | 07-09-1917 |
| Aug | 82.7 | 1947 | 69.6 | 1915 | 108 | 08-08-1930 | 41 | 08-30-1946 |
| Sep | 76.2 | 1925 | 60.1 | 1987 | 107 | 09-02-1953 | 26 | 09-26-1928 |
| Oct | 65.5 | 1963 | 47.3 | 1895 | 96 | 10-20-1894 | 16 | 10-21-1952 |
| Nov | 53.7 | 1931 | 36.8 | 1976 | 93 | 11-06-1895 | 0 | 11-30-1929 |
| Dec | 43.5 | 1923 | 21.7 | 1963 | 74 | 12-02-1982 | -23 | 12-22-1989 |
| Annual | 59.1 | 1921 | 52.0 | 1892 | 114 | 07-14-1954 | -27 | 02-13-1999 |
| Winter | 42.1 | 1932 | 22.8 | 1978 | 77 | 02-29-1972 | -27 | 02-13-1999 |
| Spring | 60.9 | 1987 | 49.4 | 1960 | 98 | 05-27-1911 | -12 | 03-06-1960 |
| Summer | 80.8 | 1936 | 69.7 | 1985 | 114 | 07-14-1954 | 34 | 06-10-1988 |
| Fall | 62.6 | 1931 | 51.2 | 1976 | 107 | 09-02-1953 | 0 | 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 | 10.5 | 25.7 | 2.6 |
| Feb | 0.0 | 5.7 | 19.7 | 1.3 |
| Mar | 0.0 | 0.9 | 13.2 | 0.1 |
| Apr | 0.1 | 0.0 | 3.5 | 0.0 |
| May | 1.4 | 0.0 | 0.1 | 0.0 |
| Jun | 8.0 | 0.0 | 0.0 | 0.0 |
| Jul | 12.4 | 0.0 | 0.0 | 0.0 |
| Aug | 9.6 | 0.0 | 0.0 | 0.0 |
| Sep | 3.6 | 0.0 | 0.2 | 0.0 |
| Oct | 0.1 | 0.0 | 3.6 | 0.0 |
| Nov | 0.0 | 0.4 | 12.6 | 0.0 |
| Dec | 0.0 | 5.8 | 21.9 | 1.2 |
| Annual | 35.1 | 23.4 | 101.7 | 5.4 |
| Winter | 0.0 | 22.0 | 67.3 | 5.2 |
| Spring | 1.5 | 0.9 | 16.7 | 0.1 |
| Summer | 29.9 | 0.0 | 0.0 | 0.0 |
| Fall | 3.8 | 0.4 | 16.6 | 0.0 |
Snowfall Summary
Station: 116558 PALESTINE 2W, IL
1971-2000 Averages
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow (in) | 6.2 | 4.3 | 2.7 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 1.0 | 4.1 | 18.6 |
Snowfall Extremes
Period of Record: 1892-2006
| Month | High (in) | Year | 1-Day Max (in) | Date |
|---|---|---|---|---|
| Jan | 21.0 | 1977 | 14.5 | 01-26-1904 |
| Feb | 19.5 | 1910 | 12.0 | 02-16-1910 |
| Mar | 20.5 | 1960 | 10.0 | 03-07-1978 |
| Apr | 6.0 | 1917 | 6.0 | 04-08-1917 |
| May | 0.0 | – | – | – |
| Jun | 0.0 | – | – | – |
| Jul | 0.0 | – | – | – |
| Aug | 0.0 | – | – | – |
| Sep | 0.0 | – | – | – |
| Oct | 2.0 | 1993 | 2.0 | 10-30-1993 |
| Nov | 7.5 | 1951 | 7.0 | 11-28-1958 |
| Dec | 15.5 | 1973 | 12.5 | 12-14-1987 |
| Season (Jul-Jun) | 49.0 | 1977-1978 | 14.5 | 01-26-1904 |
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 | 2.4 | 1.7 | 0.7 | 0.3 |
| Feb | 2.4 | 1.7 | 0.7 | 0.3 |
| Mar | 1.2 | 1.0 | 0.6 | 0.1 |
| Apr | 0.2 | 0.1 | 0.0 | 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 | 0.0 | 0.0 | 0.0 | 0.0 |
| Nov | 0.7 | 0.4 | 0.2 | 0.0 |
| Dec | 2.3 | 1.6 | 0.9 | 0.1 |
| Annual | 10.6 | 7.7 | 3.8 | 0.7 |
Growing Season Summary
Station: 116558 PALESTINE 2W, 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 | 30 | 65 | 218 | 457 | 777 | 1010 | 1158 | 1109 | 833 | 524 | 214 | 57 | 6358 |
| 45 | 12 | 29 | 130 | 321 | 624 | 861 | 1003 | 954 | 683 | 377 | 127 | 25 | 5069 |
| 50 | 4 | 11 | 71 | 203 | 472 | 711 | 848 | 799 | 534 | 248 | 66 | 11 | 3913 |
| 55 | 1 | 3 | 33 | 112 | 326 | 561 | 693 | 644 | 388 | 143 | 29 | 4 | 2887 |
| 60 | 0 | 0 | 11 | 53 | 199 | 413 | 538 | 490 | 255 | 68 | 10 | 1 | 2000 |
| 50** | 16 | 36 | 128 | 271 | 493 | 685 | 799 | 760 | 550 | 322 | 116 | 27 | 4139 |
**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 | 4/11 | 3/27 | 4/05 | 5/01 | 5/16 | 10/15 | 9/01 | 9/27 | 11/10 | 11/22 |
| 30 | 4/09 | 3/18 | 3/23 | 4/18 | 4/22 | 10/21 | 9/22 | 10/08 | 11/12 | 11/23 |
| 28 | 4/06 | 3/07 | 3/15 | 4/12 | 4/19 | 10/30 | 10/09 | 10/13 | 11/18 | 12/05 |
| 24 | 3/18 | 1/30 | 3/09 | 4/09 | 4/18 | 11/11 | 10/13 | 10/24 | 12/03 | 12/05 |
| 20 | 3/09 | 1/29 | 2/07 | 3/25 | 3/28 | 11/22 | 10/24 | 11/08 | 12/18 | 12/25 |
| 16 | 2/22 | 1/12 | 1/30 | 3/14 | 3/25 | 12/10 | 11/15 | 11/19 | 12/30 | 1/02 |
Length of Growing Season (Days)
Derived from 1971-2000 Averages
| Temp °F | Median | Shortest | 10% | 90% | Longest |
|---|---|---|---|---|---|
| 32 | 190 | 146 | 160 | 212 | 229 |
| 30 | 204 | 161 | 178 | 218 | 230 |
| 28 | 210 | 184 | 191 | 239 | 252 |
| 24 | 233 | 196 | 212 | 261 | 280 |
| 20 | 262 | 222 | 239 | 287 | 320 |
| 16 | 286 | 255 | 264 | 326 | 347 |
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007