Precipitation Summary
Station: 116661 PAW PAW 2 NW, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prec. (in) | 1.39 | 1.26 | 2.34 | 3.47 | 4.23 | 4.40 | 3.77 | 4.17 | 3.81 | 2.76 | 3.00 | 2.16 | 36.76 |
Precipitation Extremes
Period of Record: 1912-2006
| Month | High (in) | Year | Low (in) | Year | 1-Day Max (in) |
Date |
|---|---|---|---|---|---|---|
| Jan | 4.63 | 1916 | 0.00 | 1956 | 3.50 | 01-24-1938 |
| Feb | 5.46 | 1997 | 0.00 | 1987 | 2.95 | 02-21-1997 |
| Mar | 5.72 | 1920 | 0.30 | 1958 | 3.35 | 03-25-1954 |
| Apr | 7.48 | 1947 | 0.32 | 1915 | 2.97 | 04-28-1959 |
| May | 8.68 | 2004 | 0.45 | 1934 | 3.88 | 05-10-1951 |
| Jun | 11.46 | 1993 | 0.24 | 1988 | 6.92 | 06-24-1994 |
| Jul | 10.50 | 1982 | 0.26 | 1916 | 5.46 | 07-10-2000 |
| Aug | 12.58 | 1987 | 0.17 | 2003 | 4.55 | 08-27-1965 |
| Sep | 13.17 | 1970 | 0.44 | 1956 | 5.24 | 09-10-1992 |
| Oct | 10.61 | 1954 | 0.00 | 1964 | 4.06 | 10-11-1954 |
| Nov | 9.02 | 1985 | 0.23 | 1976 | 2.85 | 11-17-1928 |
| Dec | 6.79 | 1982 | 0.17 | 1943 | 3.77 | 12-03-1982 |
| Annual | 50.47 | 1951 | 19.51 | 2005 | 6.92 | 06-24-1994 |
| Winter | 9.04 | 1950 | 1.36 | 1931 | 3.77 | 12-03-1982 |
| Spring | 14.40 | 1973 | 3.83 | 2005 | 3.88 | 05-10-1951 |
| Summer | 21.16 | 1972 | 3.42 | 1976 | 6.92 | 06-24-1994 |
| Fall | 18.49 | 1941 | 2.66 | 1956 | 5.24 | 09-10-1992 |
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 | 7.0 | 3.8 | 0.7 | 0.2 |
| Feb | 5.7 | 3.0 | 0.7 | 0.1 |
| Mar | 8.6 | 5.8 | 1.2 | 0.3 |
| Apr | 10.7 | 7.5 | 2.3 | 0.8 |
| May | 10.6 | 7.8 | 3.1 | 1.2 |
| Jun | 9.6 | 7.1 | 2.7 | 1.0 |
| Jul | 8.9 | 6.1 | 2.2 | 1.0 |
| Aug | 9.5 | 6.5 | 2.8 | 1.1 |
| Sep | 8.5 | 5.9 | 2.6 | 1.0 |
| Oct | 8.1 | 5.1 | 1.8 | 0.6 |
| Nov | 8.9 | 6.1 | 1.9 | 0.7 |
| Dec | 8.3 | 5.2 | 1.1 | 0.4 |
| Annual | 104.6 | 69.9 | 23.1 | 8.5 |
| Winter | 21.1 | 12.0 | 2.5 | 0.7 |
| Spring | 30.1 | 21.2 | 6.7 | 2.3 |
| Summer | 28.1 | 19.7 | 7.7 | 3.1 |
| Fall | 25.4 | 17.1 | 6.2 | 2.4 |
Temperature Summary
Station 116661 PAW PAW 2 NW, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 25.3 | 30.9 | 43.2 | 57.4 | 69.7 | 79.2 | 82.1 | 79.8 | 73.3 | 61.3 | 44.7 | 30.8 | 56.5 |
| Low °F | 7.7 | 13.3 | 24.6 | 35.8 | 47.2 | 56.4 | 60.4 | 58.0 | 49.5 | 37.7 | 26.2 | 14.0 | 35.9 |
| Mean °F | 16.5 | 22.1 | 33.9 | 46.6 | 58.5 | 67.8 | 71.3 | 68.9 | 61.4 | 49.5 | 35.5 | 22.4 | 46.2 |
| HDD | 1503 | 1202 | 964 | 553 | 254 | 42 | 12 | 41 | 147 | 483 | 887 | 1320 | 7408 |
| CDD | 0 | 0 | 0 | 1 | 50 | 125 | 204 | 162 | 39 | 3 | 0 | 0 | 584 |
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 | 31.9 | 2006 | 6.2 | 1977 | 64 | 01-25-1967 | -25 | 01-11-1979 |
| Feb | 34.5 | 1998 | 10.6 | 1979 | 68 | 02-28-1976 | -33 | 02-03-1996 |
| Mar | 41.8 | 1973 | 25.4 | 1965 | 83 | 03-30-1986 | -16 | 03-04-2002 |
| Apr | 54.7 | 1977 | 41.6 | 1975 | 92 | 04-19-2002 | 9 | 04-07-1982 |
| May | 67.5 | 1977 | 52.0 | 1997 | 94 | 05-20-1975 | 24 | 05-03-2005 |
| Jun | 73.1 | 2005 | 63.5 | 1982 | 101 | 06-26-1988 | 36 | 06-10-1972 |
| Jul | 76.6 | 1966 | 66.3 | 2000 | 101 | 07-11-1966 | 41 | 07-23-2000 |
| Aug | 75.7 | 1988 | 64.6 | 1992 | 99 | 08-18-1988 | 37 | 08-28-1986 |
| Sep | 67.8 | 2005 | 58.0 | 1975 | 93 | 09-09-1978 | 29 | 09-23-1995 |
| Oct | 60.8 | 1963 | 44.5 | 1987 | 88 | 10-07-1963 | 16 | 10-26-1962 |
| Nov | 47.0 | 2001 | 26.8 | 1995 | 76 | 11-01-1968 | -7 | 11-29-1976 |
| Dec | 33.4 | 1982 | 9.1 | 2000 | 65 | 12-03-1982 | -23 | 12-24-1983 |
| Annual | 50.4 | 1998 | 42.1 | 1984 | 101 | 06-26-1988 | -33 | 02-03-1996 |
| Winter | 28.8 | 2002 | 12.3 | 1979 | 68 | 02-28-1976 | -33 | 02-03-1996 |
| Spring | 54.3 | 1977 | 40.2 | 1996 | 94 | 05-20-1975 | -16 | 03-04-1902 |
| Summer | 74.2 | 1988 | 66.1 | 2000 | 101 | 06-26-1988 | 36 | 06-10-1972 |
| Fall | 55.4 | 1971 | 45.2 | 1995 | 93 | 09-09-1978 | -7 | 11-29-1976 |
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 | 21.0 | 30.4 | 8.4 |
| Feb | 0.0 | 14.6 | 26.4 | 4.8 |
| Mar | 0.0 | 5.5 | 24.6 | 0.4 |
| Apr | 0.1 | 0.3 | 10.1 | 0.0 |
| May | 0.5 | 0.0 | 1.1 | 0.0 |
| Jun | 2.7 | 0.0 | 0.0 | 0.0 |
| Jul | 4.1 | 0.0 | 0.0 | 0.0 |
| Aug | 1.9 | 0.0 | 0.0 | 0.0 |
| Sep | 0.6 | 0.0 | 0.2 | 0.0 |
| Oct | 0.0 | 0.0 | 7.1 | 0.0 |
| Nov | 0.0 | 4.2 | 20.6 | 0.2 |
| Dec | 0.0 | 15.9 | 29.5 | 4.6 |
| Annual | 9.8 | 61.8 | 150.8 | 18.4 |
| Winter | 0.0 | 51.4 | 86.3 | 17.7 |
| Spring | 0.5 | 5.7 | 35.4 | 0.4 |
| Summer | 8.7 | 0.0 | 0.0 | 0.0 |
| Fall | 0.6 | 4.2 | 28.2 | 0.2 |
Snowfall Summary
Station: 116661 PAW PAW 2 NW, IL
1971-2000 Averages
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow (in) | 9.0 | 5.9 | 4.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 2.4 | 8.3 | 30.8 |
Snowfall Extremes
Period of Record: 1912-2006
| Month | High (in) | Year | 1-Day Max (in) | Date |
|---|---|---|---|---|
| Jan | 31.5 | 1979 | 14.0 | 01-27-1967 |
| Feb | 19.8 | 1994 | 8.0 | 02-11-1988 |
| Mar | 20.3 | 1972 | 9.3 | 03-20-1967 |
| Apr | 11.0 | 1975 | 10.0 | 04-03-1975 |
| May | 1.0 | 1966 | 1.0 | 05-11-1966 |
| Jun | 0.0 | – | – | – |
| Jul | 0.0 | – | – | – |
| Aug | 0.0 | – | – | – |
| Sep | 0.0 | – | – | – |
| Oct | 4.0 | 1967 | 4.0 | 10-27-1967 |
| Nov | 11.0 | 1971 | 7.0 | 11-07-1951 |
| Dec | 27.0 | 1951 | 10.0 | 12-15-1987 |
| Season (Jul-Jun) | 72.5 | 1978-1979 | 14.0 | 01-27-1967 |
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 | 3.3 | 2.4 | 1.3 | 0.2 |
| Feb | 3.3 | 2.4 | 1.3 | 0.2 |
| Mar | 2.0 | 1.3 | 0.7 | 0.2 |
| Apr | 0.4 | 0.3 | 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 | 0.1 | 0.1 | 0.0 | 0.0 |
| Nov | 1.3 | 1.0 | 0.5 | 0.1 |
| Dec | 4.5 | 3.3 | 1.7 | 0.3 |
| Annual | 16.7 | 12.1 | 6.4 | 1.1 |
Growing Season Summary
Station: 116661 PAW PAW 2 NW, 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 | 9 | 68 | 245 | 581 | 848 | 994 | 919 | 680 | 340 | 81 | 9 | 4701 |
| 45 | 0 | 1 | 35 | 144 | 432 | 700 | 840 | 765 | 531 | 216 | 38 | 3 | 3648 |
| 50 | 0 | 0 | 15 | 74 | 294 | 552 | 686 | 611 | 385 | 121 | 16 | 1 | 2716 |
| 55 | 0 | 0 | 5 | 35 | 179 | 406 | 531 | 458 | 251 | 57 | 4 | 0 | 1901 |
| 60 | 0 | 0 | 2 | 14 | 96 | 268 | 378 | 306 | 144 | 21 | 0 | 0 | 1213 |
| 50** | 0 | 5 | 45 | 150 | 349 | 550 | 669 | 605 | 420 | 204 | 46 | 5 | 3004 |
**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 | 5/01 | 3/30 | 4/12 | 5/12 | 5/25 | 10/10 | 9/22 | 9/25 | 10/26 | 11/04 |
| 30 | 4/22 | 3/28 | 4/05 | 5/09 | 5/13 | 10/17 | 9/22 | 9/26 | 11/03 | 11/11 |
| 28 | 4/13 | 3/24 | 4/02 | 5/05 | 5/11 | 10/19 | 10/02 | 10/05 | 11/05 | 11/19 |
| 24 | 4/07 | 3/15 | 3/24 | 4/15 | 4/22 | 11/02 | 10/02 | 10/14 | 11/13 | 11/20 |
| 20 | 3/22 | 2/26 | 3/15 | 4/08 | 4/10 | 11/11 | 10/20 | 10/26 | 11/29 | 12/08 |
| 16 | 3/14 | 2/09 | 2/24 | 4/07 | 4/09 | 11/20 | 11/03 | 11/07 | 12/09 | 12/22 |
Length of Growing Season (Days)
Derived from 1971-2000 Averages
| Temp °F | Median | Shortest | 10% | 90% | Longest |
|---|---|---|---|---|---|
| 32 | 166 | 138 | 143 | 186 | 201 |
| 30 | 179 | 138 | 148 | 203 | 213 |
| 28 | 191 | 148 | 160 | 211 | 225 |
| 24 | 208 | 176 | 191 | 224 | 241 |
| 20 | 232 | 195 | 211 | 255 | 277 |
| 16 | 255 | 214 | 218 | 280 | 294 |
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007