Pennsylvania · county areal climate 1951–2025
Chester County, PA
A 53.8°F / 48.6" normal · 2025 ran -0.2°F vs normal.
2026 so far · through Jul 9: This area is running
+0.5°F (50.4°F) vs the 1996–2025 to-date normal — the
14th warmest start of 76 years. Precipitation
74% of normal.
U.S. year-to-date → Normal (1996–2025)
53.8°F
annual mean · 48.6" precipitation
2025 vs Normal
-0.2°F
53.6°F · 41.2" (85% of normal)
Warmest Year
55.5°F
2012 · coldest 50.1°F (1958)
Wettest Year
70.3in
2018 · driest 32.1" (1965)
Hottest Day
102.5°F
Jul 23 · 2011
Coldest Day
-10.0°F
Jan 21 · 1994
Biggest Rain Day
6.52in
Aug 28 · 2011
Record
1951–2025
75 complete years · NOAA nClimGrid
—— normal temperature (°F) · ▮ normal precipitation (in) · 1996–2025
Areal
nClimGrid averages (NOAA/NCEI) over the whole area — an average across the region, not a single station. Separate from the
station records.