Chester, PA Weather & Climate Normals
What a normal year in Chester actually looks like
On the 30-year record NOAA keeps for Chester, PA, the comfort score comes out to 50/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Chester's weather actually swings
Average temperatures in Chester run from 35°F in Jan up to 79°F in Jul, a 44.5°F seasonal swing, a middling gap by national standards.
Chester, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 43°F | 27°F | 3.15in |
| Feb | 46°F | 28°F | 2.22in |
| Mar | 53°F | 35°F | 3.93in |
| Apr | 66°F | 45°F | 3.48in |
| May | 75°F | 55°F | 3.16in |
| Jun | 84°F | 65°F | 3.31in |
| Jul | 89°F | 70°F | 4.81in |
| Aug | 87°F | 69°F | 3.68in |
| Sep | 80°F | 61°F | 4.36in |
| Oct | 68°F | 50°F | 3.69in |
| Nov | 57°F | 40°F | 2.61in |
| Dec | 48°F | 32°F | 3.25in |
If you're timing a visit, Apr, May, Jun, Sep, and Oct are Chester's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Chester actually gets
Chester averages 41.65in of precipitation a year across roughly 102 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Chester against the rest of the country
Out of 4876 cities scored here, Chester comes in at 1689; within PA alone it ranks 7 of 193. Population is about 34,052.
Checking the actual forecast
These figures come from Marcus Hook, PA US, the NOAA station 3.3 miles from Chester, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · Why this uses the nearest NOAA station