St. Clair County, MO
: September 2026 so far averaged 79.7°F in St. Clair County, MO, 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
- 82.3°F
- Warmest since 2025
- 26th warmest of 76
- Low
- 60.3°F
- Warmest since 2023
- 11th warmest of 76
No measurable precipitation in the county average of St. Clair County, MO for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 42.3 to 58.3°F
Every year as a table
Every 29 September high of the county average in St. Clair County, MO since 1951: 82.3°F in 2026; the highest is 99.3°F, in 1953.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 82.3 | 60.3 |
| 2025 | 87.5 | 57.8 |
| 2024 | 80.3 | 56.4 |
| 2023 | 89.3 | 62 |
| 2022 | 73.9 | 43.5 |
| 2021 | 88.3 | 62.2 |
| 2020 | 69.1 | 45.2 |
| 2019 | 84.6 | 68.7 |
| 2018 | 73 | 47.1 |
| 2017 | 75.6 | 50.1 |
| 2016 | 71.6 | 48.6 |
| 2015 | 83.2 | 57.4 |
| 2014 | 83.5 | 57.8 |
| 2013 | 74.2 | 51.2 |
| 2012 | 70.1 | 53.4 |
| 2011 | 84.8 | 52.4 |
| 2010 | 75.4 | 51 |
| 2009 | 69.6 | 43.7 |
| 2008 | 82.7 | 58.7 |
| 2007 | 84.1 | 55.4 |
| 2006 | 65.5 | 41.8 |
| 2005 | 74.4 | 42.4 |
| 2004 | 71.9 | 43.9 |
| 2003 | 65 | 38.4 |
| 2002 | 88.2 | 56.8 |
| 2001 | 75.2 | 45.1 |
| 2000 | 79.4 | 48.1 |
| 1999 | 58.1 | 44.9 |
| 1998 | 88.7 | 65 |
| 1997 | 77.3 | 52.7 |
| 1996 | 70.7 | 43 |
| 1995 | 83.5 | 58.3 |
| 1994 | 78.1 | 48.4 |
| 1993 | 73.9 | 44.3 |
| 1992 | 67.5 | 37.5 |
| 1991 | 81.3 | 51.2 |
| 1990 | 82 | 57.8 |
| 1989 | 76.5 | 41.4 |
| 1988 | 81.8 | 59.5 |
| 1987 | 68.4 | 54 |
| 1986 | 87.1 | 68.9 |
| 1985 | 75.1 | 53.2 |
| 1984 | 56.7 | 39.6 |
| 1983 | 85.1 | 57.9 |
| 1982 | 82.7 | 62.6 |
| 1981 | 82.2 | 53 |
| 1980 | 65.2 | 52.8 |
| 1979 | 87.7 | 54.1 |
| 1978 | 79.4 | 47.8 |
| 1977 | 75.4 | 56 |
| 1976 | 62.5 | 52.7 |
| 1975 | 62.2 | 50.4 |
| 1974 | 65.1 | 39.3 |
| 1973 | 72.1 | 54.1 |
| 1972 | 81.3 | 52.4 |
| 1971 | 87.7 | 69.7 |
| 1970 | 78.7 | 47.8 |
| 1969 | 83.5 | 55.7 |
| 1968 | 82.8 | 54.5 |
| 1967 | 62.9 | 33.1 |
| 1966 | 72.9 | 51.2 |
| 1965 | 79.5 | 56.5 |
| 1964 | 72.8 | 44.9 |
| 1963 | 81.2 | 48.9 |
| 1962 | 70.3 | 48.3 |
| 1961 | 74.9 | 49.1 |
| 1960 | 83.6 | 49.2 |
| 1959 | 76.7 | 50.1 |
| 1958 | 68.7 | 47.7 |
| 1957 | 73 | 37.3 |
| 1956 | 92 | 58.7 |
| 1955 | 85 | 64.5 |
| 1954 | 87.5 | 61.9 |
| 1953 | 99.3 | 68.7 |
| 1952 | 93.1 | 54.3 |
| 1951 | 67.2 | 43.1 |
The month
August 2026 averaged 80.3°F in St. Clair County, MO, the warmest August in the county average since 2007, tied 22nd warmest of 132 (with 1930) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 82.3°F averaged over St. Clair County, MO, the warmest 29 September in the county average since 2025, 26th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 60.3°F averaged over St. Clair County, MO, the warmest 29 September night in the county average since 2023, 11th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Springfield, MO 59.4 mi, the nearest city with its own station