Clark County, IL
: September 2026 so far averaged 74.8°F in Clark County, IL, the warmest 1 to 29 September in the county average since the data begin in 1951 (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 80.5°F
- Warmest since 2025
- 27th warmest of 76
- Low
- 47.3°F
- Coldest since 2022
- 34th coldest of 76
No measurable precipitation in the county average of Clark County, IL for 8 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 40.9 to 55.4°F
Every year as a table
Every 29 September high of the county average in Clark County, IL since 1951: 80.5°F in 2026; the highest is 95.1°F, in 1953.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 80.5 | 47.3 |
| 2025 | 90 | 55.5 |
| 2024 | 74.7 | 64.3 |
| 2023 | 77.7 | 53.4 |
| 2022 | 64.4 | 39 |
| 2021 | 88.4 | 59.7 |
| 2020 | 67.3 | 45.5 |
| 2019 | 88.1 | 66.9 |
| 2018 | 75.8 | 46.6 |
| 2017 | 76.7 | 45.1 |
| 2016 | 66.9 | 52.8 |
| 2015 | 83 | 62 |
| 2014 | 84.5 | 52.5 |
| 2013 | 83.9 | 55.3 |
| 2012 | 70.9 | 49.2 |
| 2011 | 70.6 | 48.5 |
| 2010 | 75 | 45.5 |
| 2009 | 67.4 | 47.8 |
| 2008 | 81.8 | 52.6 |
| 2007 | 81.8 | 49.6 |
| 2006 | 64.5 | 41 |
| 2005 | 78.9 | 44.3 |
| 2004 | 70.9 | 42.9 |
| 2003 | 60.7 | 37.8 |
| 2002 | 80.9 | 54.3 |
| 2001 | 65.6 | 42.2 |
| 2000 | 70.1 | 44 |
| 1999 | 91.3 | 51.8 |
| 1998 | 82.5 | 56.4 |
| 1997 | 79.8 | 50.3 |
| 1996 | 67.3 | 42.6 |
| 1995 | 81.5 | 48.8 |
| 1994 | 71.3 | 44 |
| 1993 | 69.7 | 39.6 |
| 1992 | 70.8 | 38.3 |
| 1991 | 78 | 50.3 |
| 1990 | 80.8 | 57.4 |
| 1989 | 73.5 | 41.4 |
| 1988 | 83.6 | 54.8 |
| 1987 | 83.6 | 59.4 |
| 1986 | 90.4 | 69.9 |
| 1985 | 73 | 45.1 |
| 1984 | 60.3 | 39.8 |
| 1983 | 81.4 | 51.9 |
| 1982 | 74.9 | 49.9 |
| 1981 | 69.4 | 44.1 |
| 1980 | 75 | 47.5 |
| 1979 | 80.8 | 58.9 |
| 1978 | 69.3 | 42.9 |
| 1977 | 72.4 | 46.9 |
| 1976 | 68.6 | 45.6 |
| 1975 | 70.8 | 43.9 |
| 1974 | 66 | 49.9 |
| 1973 | 83.5 | 68.8 |
| 1972 | 78.7 | 61.9 |
| 1971 | 88.2 | 68.8 |
| 1970 | 68.9 | 42.3 |
| 1969 | 73.1 | 42.9 |
| 1968 | 77.2 | 48.7 |
| 1967 | 55.5 | 35.9 |
| 1966 | 69 | 47.7 |
| 1965 | 76.9 | 49.7 |
| 1964 | 64.4 | 42.9 |
| 1963 | 80.7 | 50.7 |
| 1962 | 66.7 | 37.3 |
| 1961 | 68.8 | 39.7 |
| 1960 | 79.4 | 48.8 |
| 1959 | 84.8 | 62.4 |
| 1958 | 66.5 | 41.2 |
| 1957 | 68.5 | 38 |
| 1956 | 79.2 | 45.3 |
| 1955 | 81.6 | 55.9 |
| 1954 | 84.3 | 63.6 |
| 1953 | 95.1 | 51.9 |
| 1952 | 87 | 52.6 |
| 1951 | 61.1 | 34.6 |
The month
August 2026 averaged 74.9°F in Clark County, IL, the warmest August in the county average since 2021, tied 42nd warmest of 132 (with 2018, 2006, 2001 and 1 other year) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 80.5°F averaged over Clark County, IL, the warmest 29 September in the county average since 2025, 27th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 47.3°F averaged over Clark County, IL, the coldest 29 September night in the county average since 2022, 34th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Indianapolis, IN 84.9 mi, the nearest city with its own station