Weather World
Chester County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 47°F Lo 32°F | Hi 52°F Lo 36°F | Hi 62°F Lo 44°F | Hi 70°F Lo 51°F | Hi 78°F Lo 60°F | Hi 87°F Lo 68°F | Hi 90°F Lo 71°F | Hi 89°F Lo 70°F | Hi 84°F Lo 64°F | Hi 73°F Lo 53°F | Hi 60°F Lo 43°F | Hi 52°F Lo 38°F |
| 8 mph | 8 mph | 8 mph | 8 mph | 7 mph | 6 mph | 5 mph | 5 mph | 6 mph | 7 mph | 8 mph | 8 mph |
| 5.3 in | 6.4 in | 7.2 in | 6.8 in | 6.8 in | 5.7 in | 5.2 in | 4.4 in | 4.9 in | 5.3 in | 4.1 in | 6.9 in |
| 76% | 78% | 78% | 76% | 78% | 76% | 76% | 73% | 72% | 70% | 72% | 77% |
| 48% | 51% | 47% | 39% | 40% | 31% | 34% | 31% | 32% | 32% | 36% | 49% |
| 30.2 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.2 in | 30.1 in |
| 22 | 20 | 22 | 23 | 22 | 21 | 20 | 22 | 23 | 25 | 24 | 23 |
| 7 | 7 | 8 | 7 | 9 | 9 | 11 | 9 | 7 | 6 | 6 | 7 |
| 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 |
| 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 173 | 144 | 158 | 185 | 182 | 215 | 210 | 233 | 222 | 226 | 212 | 164 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 8°C Lo -0°C | Hi 11°C Lo 2°C | Hi 17°C Lo 7°C | Hi 21°C Lo 11°C | Hi 26°C Lo 16°C | Hi 31°C Lo 20°C | Hi 32°C Lo 22°C | Hi 32°C Lo 21°C | Hi 29°C Lo 18°C | Hi 23°C Lo 12°C | Hi 16°C Lo 6°C | Hi 11°C Lo 3°C |
| 13 km/h | 14 km/h | 14 km/h | 14 km/h | 11 km/h | 9 km/h | 8 km/h | 8 km/h | 9 km/h | 11 km/h | 12 km/h | 13 km/h |
| 134 mm | 163 mm | 183 mm | 172 mm | 173 mm | 146 mm | 132 mm | 112 mm | 123 mm | 135 mm | 104 mm | 176 mm |
| 76% | 78% | 78% | 76% | 78% | 76% | 76% | 73% | 72% | 70% | 72% | 77% |
| 48% | 51% | 47% | 39% | 40% | 31% | 34% | 31% | 32% | 32% | 36% | 49% |
| 1022 mb | 1020 mb | 1018 mb | 1016 mb | 1015 mb | 1014 mb | 1015 mb | 1015 mb | 1016 mb | 1018 mb | 1021 mb | 1021 mb |
| 22 | 20 | 22 | 23 | 22 | 21 | 20 | 22 | 23 | 25 | 24 | 23 |
| 7 | 7 | 8 | 7 | 9 | 9 | 11 | 9 | 7 | 6 | 6 | 7 |
| 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 |
| 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 173 | 144 | 158 | 185 | 182 | 215 | 210 | 233 | 222 | 226 | 212 | 164 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.