Chester County, PA
An ordinary day in Chester County, PA: was cooler than 57 of 75 earlier years in the county average (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 67.3°F
- Coldest since 2023
- 19th coldest of 76
- Low
- 58.1°F
- Warmest since 2025
- 14th warmest of 76
- Precipitation
- 0.02 in
- Wettest since 2024
- 27th wettest of 76
- Normal range, 66.1 to 79.3°F
Every year as a table
Every 29 September low of the county average in Chester County, PA since 1951: 58.1°F in 2026; the lowest is 35.4°F, in 1957.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 67.3 | 58.1 |
| 2025 | 83 | 60 |
| 2024 | 71.5 | 60.7 |
| 2023 | 62.2 | 51.6 |
| 2022 | 66.9 | 46.3 |
| 2021 | 74.5 | 52.7 |
| 2020 | 79.6 | 63.9 |
| 2019 | 82.6 | 58.8 |
| 2018 | 71.6 | 53.1 |
| 2017 | 75.6 | 47.7 |
| 2016 | 69.8 | 52.6 |
| 2015 | 79.3 | 61.9 |
| 2014 | 81.9 | 54.9 |
| 2013 | 72.7 | 48 |
| 2012 | 74 | 54.4 |
| 2011 | 77.9 | 66.1 |
| 2010 | 78.1 | 55.3 |
| 2009 | 72.6 | 49.8 |
| 2008 | 73.1 | 57.4 |
| 2007 | 77.9 | 53.6 |
| 2006 | 74.3 | 51.4 |
| 2005 | 75.5 | 49.2 |
| 2004 | 72.2 | 61 |
| 2003 | 68.1 | 50.4 |
| 2002 | 74.2 | 48.3 |
| 2001 | 61.6 | 44.6 |
| 2000 | 66.2 | 39 |
| 1999 | 75.7 | 62.3 |
| 1998 | 77.8 | 48.2 |
| 1997 | 71.2 | 53.1 |
| 1996 | 74.1 | 51.5 |
| 1995 | 73.7 | 45.6 |
| 1994 | 71.6 | 48.7 |
| 1993 | 65.3 | 43.5 |
| 1992 | 66.3 | 49.3 |
| 1991 | 65.6 | 38.7 |
| 1990 | 75.4 | 50.3 |
| 1989 | 67.5 | 39.5 |
| 1988 | 75.1 | 47.2 |
| 1987 | 81.1 | 53.2 |
| 1986 | 70.6 | 57.8 |
| 1985 | 69.5 | 44.9 |
| 1984 | 50.3 | 41.2 |
| 1983 | 73.2 | 45 |
| 1982 | 73.1 | 52.3 |
| 1981 | 65.2 | 38.5 |
| 1980 | 72.9 | 44.2 |
| 1979 | 73.6 | 57.9 |
| 1978 | 69 | 36.2 |
| 1977 | 70.9 | 47.1 |
| 1976 | 67.2 | 41 |
| 1975 | 70.9 | 43.5 |
| 1974 | 73 | 61.3 |
| 1973 | 76.9 | 62.7 |
| 1972 | 70.1 | 57.7 |
| 1971 | 71.8 | 56.9 |
| 1970 | 63.3 | 40.2 |
| 1969 | 69.4 | 43.6 |
| 1968 | 73.6 | 44.1 |
| 1967 | 73.2 | 62.8 |
| 1966 | 56.5 | 50.3 |
| 1965 | 67.7 | 41.3 |
| 1964 | 55.1 | 47.3 |
| 1963 | 76 | 53.6 |
| 1962 | 64.8 | 44.7 |
| 1961 | 71.7 | 41.2 |
| 1960 | 70 | 58.9 |
| 1959 | 82.7 | 66.5 |
| 1958 | 65.6 | 38.9 |
| 1957 | 61.7 | 35.4 |
| 1956 | 58.9 | 50.5 |
| 1955 | 74.1 | 48.6 |
| 1954 | 83.2 | 55.8 |
| 1953 | 81 | 48.5 |
| 1952 | 76.2 | 45.9 |
| 1951 | 64.6 | 37 |
The month
September 2026 so far averaged 68.5°F in Chester County, PA, the warmest 1 to 29 September in the county average since 2021, 14th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 75.2°F in Chester County, PA, the warmest August in the county average since 2022, 14th warmest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 67.3°F averaged over Chester County, PA, the coldest 29 September day in the county average since 2023, 19th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 58.1°F averaged over Chester County, PA, the warmest 29 September night in the county average since 2025, 14th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: 0.02 in of precipitation averaged over Chester County, PA, the wettest 29 September in the county average since 2024, tied 27th wettest of 76 (with 2003 and 1994) (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Wilmington, DE 22.1 mi, the nearest city with its own station