Weather in Hampden County, Massachusetts for September 2025
Until now, September 2025 in Hampden County is cooler than usual, with temperatures averaging 22.6 °F, this is -2.8 °F below the typical seasonal average.
The forecast for the upcoming days in Hampden County predicts a temperature of 27.1 °F, which is slightly above the historical average.
In general, the average temperature in Hampden County at the beginning of September is 26.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 27.6 °F by the end of September.
The climate of Hampden County in September is notably wet, with an average of 13 rainy days, and a total of 191.1 mm of precipitation.
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Hampden County Weather September
Temperatures trend during September in Hampden County
September weather in Hampden County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 25° /13° | 4.4 mm | 6 | |
| Sept. 2 |  Mist | 26° /12° | 0 mm | 6 | |
| Sept. 3 | Mist | 26° /11° | 0 mm | 6 | |
| Sept. 4 | Fog | 26° /12° | 0 mm | 6 | |
| Sept. 5 | Mist | 29° /15° | 14.2 mm | 7 | |
| Sept. 6 |  Partly cloudy | 28° /16° | 2.4 mm | 6 | |
| Sept. 7 |  Thundery outbreaks possible | 24° /14° | 35.4 mm | 6 | |
| Sept. 8 | Sunny | 24° /12° | 2.3 mm | 6 | |
| Sept. 9 | Partly cloudy | 24° /13° | 7.7 mm | 6 | |
| Sept. 10 |  Light rain shower | 24° /13° | 4.1 mm | 5 | |
| Sept. 11 | Light rain shower | 25° /11° | 0.8 mm | 6 | |
| Sept. 12 | Partly cloudy | 25° /14° | 0 mm | 6 | |
| Sept. 13 |  Moderate or heavy rain shower | 25° /13° | 6.5 mm | 6 | |
| Sept. 14 |  Cloudy | 25° /14° | 0 mm | 6 | |
| Sept. 15 | Sunny | 26° /15° | 0 mm | 1.4 | |
| Sept. 16 | Fog | 24° /14° | 0 mm | 1.4 | |
| Sept. 17 | Partly cloudy | 23° /14° | 0 mm | 1.2 | |
| Sept. 18 | Sunny | 29° /12° | 0 mm | 1.3 | |
| Sept. 19 | Sunny | 26° /12° | 0 mm | 0 | |
| Sept. 20 | Sunny | 20° /5° | 0 mm | 4 | |
| Sept. 21 | Sunny | 24° /4° | 0 mm | 4 | |
| Sept. 22 | Sunny | 27° /7° | 0 mm | 5 | |
| Sept. 23 | Partly cloudy | 27° /10° | 0 mm | 5 | |
| Sept. 24 | Sunny | 30° /12° | 0 mm | 5 | |
| Sept. 25 | Sunny | 31° /13° | 0 mm | 6 | |
| Sept. 26 | Sunny | 30° /16° | 0 mm | 6 | |
| Sept. 27 | Sunny | 29° /13° | 0 mm | 6 | |
| Sept. 28 | Sunny | 34° /15° | 0 mm | 6 | |
| Sept. 29 |  Patchy light drizzle | 18° /13° | 0.8 mm | 4 | |
| Sept. 30 |  Overcast | 21° /11° | 0.3 mm | 5 | |
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Hampden County in September - FAQ
September rainfall patterns in Hampden County
UV exposure in Hampden County during September
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Where is Hampden County?Get accurate weather forecasts for Hampden County, located at latitude 42.101 and longitude -72.59. Stay updated with localized weather information tailored for Hampden County.