McLean County, IL
: September 2026 so far averaged 72.2°F in McLean 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.
- Tuesday 29 September 2026: a high of 77.2°F averaged over McLean County, IL, the warmest 29 September in the county average since 2025, 25th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 46.4°F averaged over McLean County, IL, the coldest 29 September night in the county average since 2022, 35th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- No measurable precipitation in the county average of McLean County, IL for 7 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
The month
- August 2026 averaged 73.5°F in McLean County, IL, the warmest August in the county average since 2021, tied 30th warmest of 132 (with 1899) (county average from NOAA's monthly county data, 1895 to 2026).
- Days of the month without a value
- 0
Every year on this date
- Above the normal range
- In it
- Below it
- Normal range
- This year and the extreme
Every year as a table
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 77.2 | 46.4 |
| 2025 | 90.2 | 54.6 |
| 2024 | 73.9 | 59.6 |
| 2023 | 74.8 | 53.1 |
| 2022 | 65.2 | 36.2 |
| 2021 | 86.8 | 56.1 |
| 2020 | 65.2 | 43.8 |
| 2019 | 78.3 | 62.9 |
| 2018 | 72.2 | 42.6 |
| 2017 | 73.7 | 45.6 |
| 2016 | 63.3 | 51.7 |
| 2015 | 81.2 | 61.7 |
| 2014 | 84 | 52.6 |
| 2013 | 84.3 | 52.6 |
| 2012 | 72 | 43 |
| 2011 | 68.7 | 47.4 |
| 2010 | 74.8 | 44.5 |
| 2009 | 63.8 | 47.3 |
| 2008 | 81.1 | 52.7 |
| 2007 | 80.9 | 47.4 |
| 2006 | 60.7 | 39.9 |
| 2005 | 76.1 | 42 |
| 2004 | 72 | 42.2 |
| 2003 | 58.8 | 35.7 |
| 2002 | 80.9 | 51.4 |
| 2001 | 60.1 | 42.9 |
| 2000 | 73 | 44.2 |
| 1999 | 72.8 | 48.8 |
| 1998 | 83.5 | 55.5 |
| 1997 | 73 | 50.2 |
| 1996 | 66.7 | 43.3 |
| 1995 | 81.1 | 49.8 |
| 1994 | 70.5 | 43.9 |
| 1993 | 62.8 | 36.7 |
| 1992 | 63.5 | 35.9 |
| 1991 | 74.6 | 47 |
| 1990 | 72 | 51.4 |
| 1989 | 74.7 | 40.1 |
| 1988 | 82 | 55.4 |
| 1987 | 81.5 | 55.1 |
| 1986 | 88.2 | 67.2 |
| 1985 | 75.3 | 45.7 |
| 1984 | 57.3 | 34.6 |
| 1983 | 82.5 | 52.5 |
| 1982 | 78.2 | 52.6 |
| 1981 | 67.4 | 43.6 |
| 1980 | 75.3 | 45.8 |
| 1979 | 82.3 | 54.8 |
| 1978 | 70 | 42.4 |
| 1977 | 72.5 | 45 |
| 1976 | 65.6 | 46.2 |
| 1975 | 70.7 | 46.6 |
| 1974 | 67.3 | 46.5 |
| 1973 | 80.1 | 65 |
| 1972 | 78.2 | 50.7 |
| 1971 | 85.9 | 66.2 |
| 1970 | 70.1 | 40.3 |
| 1969 | 73.9 | 45.3 |
| 1968 | 71.5 | 47.5 |
| 1967 | 54.4 | 34.3 |
| 1966 | 66.6 | 47.5 |
| 1965 | 77 | 49.8 |
| 1964 | 65.5 | 37.4 |
| 1963 | 76.3 | 45.4 |
| 1962 | 67.2 | 35.8 |
| 1961 | 66 | 37.3 |
| 1960 | 72.2 | 47.5 |
| 1959 | 73.2 | 53 |
| 1958 | 68.6 | 39.5 |
| 1957 | 69.8 | 35.9 |
| 1956 | 81.9 | 50.4 |
| 1955 | 75.6 | 53.8 |
| 1954 | 80.9 | 62.3 |
| 1953 | 95.7 | 58.6 |
| 1952 | 85.7 | 53.2 |
| 1951 | 61.2 | 33.7 |
Nearby
Peoria, IL 45.7 mi, the nearest city with its own station