Lake County, IL
: September 2026 so far averaged 67°F in Lake County, IL, the warmest 1 to 29 September in the county average since 2024, 9th warmest of 76 (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 72.7°F averaged over Lake County, IL, the warmest 29 September in the county average since 2025, 21st warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 47.7°F averaged over Lake County, IL, the coldest 29 September night in the county average since 2022, 37th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- No measurable precipitation in the county average of Lake County, IL for 7 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
The month
- August 2026 averaged 71.7°F in Lake County, IL, the warmest August in the county average since 2024, tied 47th warmest of 132 (with 1969) (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 | 72.7 | 47.7 |
| 2025 | 78 | 56 |
| 2024 | 74.7 | 63.1 |
| 2023 | 68.9 | 54.3 |
| 2022 | 59 | 38 |
| 2021 | 73.3 | 50.9 |
| 2020 | 61.6 | 44 |
| 2019 | 62.7 | 56.1 |
| 2018 | 57.7 | 37.9 |
| 2017 | 72.1 | 48.4 |
| 2016 | 61.9 | 50.5 |
| 2015 | 77.2 | 58.9 |
| 2014 | 76.5 | 51.7 |
| 2013 | 81.6 | 50.1 |
| 2012 | 66.8 | 44.1 |
| 2011 | 62.7 | 49.2 |
| 2010 | 69.7 | 48.4 |
| 2009 | 60.7 | 46.3 |
| 2008 | 68.3 | 52.3 |
| 2007 | 72.5 | 47.6 |
| 2006 | 58.5 | 38.2 |
| 2005 | 71.1 | 41.7 |
| 2004 | 64.2 | 45.1 |
| 2003 | 55.8 | 38.9 |
| 2002 | 73.1 | 52.3 |
| 2001 | 56.6 | 44.5 |
| 2000 | 64.3 | 44.3 |
| 1999 | 61.6 | 50.2 |
| 1998 | 75.7 | 53.1 |
| 1997 | 70.3 | 53.2 |
| 1996 | 61.9 | 47.6 |
| 1995 | 79.2 | 52.4 |
| 1994 | 63.8 | 43.6 |
| 1993 | 55.9 | 39.8 |
| 1992 | 59.3 | 35.5 |
| 1991 | 62.3 | 36.6 |
| 1990 | 64.4 | 51.6 |
| 1989 | 72.8 | 46.2 |
| 1988 | 68.9 | 55.8 |
| 1987 | 76.3 | 54.6 |
| 1986 | 78.8 | 64.2 |
| 1985 | 73.2 | 48.3 |
| 1984 | 55.5 | 33.4 |
| 1983 | 79.3 | 52.2 |
| 1982 | 72.2 | 51.5 |
| 1981 | 61.6 | 41.5 |
| 1980 | 65.1 | 48.4 |
| 1979 | 81.9 | 53.2 |
| 1978 | 63.8 | 43.1 |
| 1977 | 68.2 | 48.8 |
| 1976 | 64.1 | 43.7 |
| 1975 | 69.2 | 44.7 |
| 1974 | 66 | 46.4 |
| 1973 | 66.3 | 60.3 |
| 1972 | 72 | 46.9 |
| 1971 | 84 | 61 |
| 1970 | 59 | 37.1 |
| 1969 | 64 | 42.8 |
| 1968 | 68.6 | 45.8 |
| 1967 | 47.5 | 39.5 |
| 1966 | 63.1 | 51.4 |
| 1965 | 72.5 | 53.6 |
| 1964 | 62.4 | 34.6 |
| 1963 | 62.1 | 45.5 |
| 1962 | 63.6 | 40.3 |
| 1961 | 58.5 | 33.7 |
| 1960 | 64.6 | 49 |
| 1959 | 67.4 | 50.9 |
| 1958 | 66.5 | 42.7 |
| 1957 | 65.5 | 35.6 |
| 1956 | 75.5 | 53.2 |
| 1955 | 68.6 | 50.2 |
| 1954 | 74.8 | 59.9 |
| 1953 | 89.9 | 51.7 |
| 1952 | 78.6 | 53.2 |
| 1951 | 56.4 | 33 |
Nearby
Chicago, IL 16.9 mi, the nearest city with its own station