Precipitation Summary
Station: 118756 UTICA STARVED ROCK DAM, IL
1971-2000 NCDC Normals
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prec. (in) | 1.66 | 1.66 | 2.85 | 3.61 | 4.26 | 3.91 | 3.74 | 3.77 | 3.59 | 2.59 | 3.03 | 2.34 | 37.01 |
Precipitation Extremes
Period of Record: 1943-2005
| Month | High (in) | Year | Low (in) | Year | 1-Day Max (in) |
Date |
|---|---|---|---|---|---|---|
| Jan | 5.27 | 1965 | 0.16 | 1981 | 1.95 | 01-01-1985 |
| Feb | 5.36 | 1997 | 0.04 | 1987 | 2.88 | 02-21-1997 |
| Mar | 6.48 | 1948 | 0.08 | 1958 | 3.80 | 03-25-1954 |
| Apr | 8.36 | 1950 | 0.65 | 1946 | 2.32 | 04-27-1943 |
| May | 9.18 | 1970 | 0.62 | 1992 | 3.42 | 05-12-1966 |
| Jun | 11.60 | 1970 | 0.20 | 1988 | 3.73 | 06-02-1970 |
| Jul | 12.78 | 1958 | 0.16 | 1945 | 6.97 | 07-14-1958 |
| Aug | 10.19 | 1965 | 0.42 | 1996 | 4.85 | 08-15-1981 |
| Sep | 14.59 | 1961 | 0.58 | 1990 | 4.02 | 09-12-1961 |
| Oct | 8.16 | 1991 | 0.00 | 1964 | 2.70 | 10-11-1969 |
| Nov | 9.60 | 1985 | 0.25 | 1976 | 2.44 | 11-28-1990 |
| Dec | 6.34 | 1982 | 0.25 | 1995 | 3.15 | 12-03-1982 |
| Annual | 55.73 | 1970 | 21.34 | 1956 | 6.97 | 07-14-1958 |
| Winter | 9.92 | 1950 | 1.48 | 1977 | 3.15 | 12-03-1982 |
| Spring | 19.01 | 1991 | 4.16 | 1992 | 3.80 | 03-25-1954 |
| Summer | 22.47 | 1958 | 4.17 | 1991 | 6.97 | 07-14-1958 |
| Fall | 20.92 | 1961 | 2.27 | 1956 | 4.02 | 09-12-1961 |
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 | 10.6 | 4.2 | 0.9 | 0.1 |
| Feb | 8.5 | 4.0 | 0.9 | 0.2 |
| Mar | 11.3 | 6.5 | 1.7 | 0.5 |
| Apr | 11.7 | 7.0 | 2.4 | 0.9 |
| May | 11.4 | 7.3 | 2.9 | 1.1 |
| Jun | 10.1 | 6.4 | 2.8 | 1.1 |
| Jul | 9.7 | 5.9 | 2.5 | 1.0 |
| Aug | 9.2 | 5.9 | 2.5 | 1.1 |
| Sep | 8.4 | 5.3 | 2.1 | 1.2 |
| Oct | 9.1 | 5.0 | 1.9 | 0.6 |
| Nov | 10.8 | 6.0 | 1.9 | 0.7 |
| Dec | 11.3 | 5.1 | 1.3 | 0.5 |
| Annual | 122.0 | 68.5 | 23.8 | 9.1 |
| Winter | 30.3 | 13.3 | 3.1 | 0.9 |
| Spring | 34.4 | 20.7 | 7.0 | 2.4 |
| Summer | 28.9 | 18.2 | 7.8 | 3.2 |
| Fall | 28.3 | 16.2 | 5.9 | 2.5 |
Temperature Summary
There are insufficient temperature data to produce the temperature summary.
Snowfall Summary
Station: 118756 UTICA STARVED ROCK DAM, IL
1971-2000 Averages
| Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow (in) | 8.1 | 5.2 | 2.4 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.8 | 4.6 | 21.7 |
Snowfall Extremes
Period of Record: 1943-2005
| Month | High (in) | Year | 1-Day Max (in) | Date |
|---|---|---|---|---|
| Jan | 38.3 | 1979 | 17.0 | 01-27-1967 |
| Feb | 15.6 | 1989 | 6.0 | 02-15-2003 |
| Mar | 11.5 | 1991 | 7.0 | 03-20-1967 |
| Apr | 9.0 | 1982 | 7.0 | 04-06-1982 |
| May | 0.0 | – | – | – |
| Jun | 0.0 | – | – | – |
| Jul | 0.0 | – | – | – |
| Aug | 0.0 | – | – | – |
| Sep | 0.0 | – | – | – |
| Oct | 3.0 | 1967 | 3.0 | 10-27-1967 |
| Nov | 11.0 | 1951 | 9.0 | 11-07-1951 |
| Dec | 20.0 | 1951 | 7.0 | 12-15-1951 |
| Season (Jul-Jun) | 70.9 | 1978-1979 | 17.0 | 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 | 3.6 | 2.2 | 1.2 | 0.1 |
| Feb | 3.6 | 2.2 | 1.2 | 0.1 |
| Mar | 1.5 | 0.8 | 0.4 | 0.1 |
| Apr | 0.2 | 0.2 | 0.1 | 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 | 0.6 | 0.3 | 0.2 | 0.0 |
| Dec | 3.0 | 1.8 | 1.2 | 0.2 |
| Annual | 13.2 | 7.5 | 4.7 | 0.8 |
Growing Season Summary
There are insufficient temperature data to produce the growing season summary.
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007