Weather in Glen Mills, Pennsylvania for September 2025
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Until now, September 2025 in Glen Mills has been nearly identical to the historical average, with a temperature of 24.8 °F (showing only a slight deviation of 0.2 °F).
Expect cooler weather in the next days in Glen Mills with the forecast suggesting a temperature of 23.6 °F, lower than the historical average.
In general, the average temperature in Glen Mills at the beginning of September is 24.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °F by the end of September.
Glen Mills experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 270.5 mm.
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Glen Mills Weather September
Temperatures trend during September in Glen Mills
September weather in Glen Mills day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 25° /18° | 1.5 mm | 6 | |
| Sept. 2 |  Overcast | 25° /15° | 0 mm | 6 | |
| Sept. 3 |  Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 4 | Overcast | 26° /13° | 0 mm | 6 | |
| Sept. 5 |  Partly cloudy | 29° /16° | 22.3 mm | 7 | |
| Sept. 6 | Light rain shower | 26° /18° | 6.6 mm | 6 | |
| Sept. 7 |  Fog | 20° /13° | 41.3 mm | 5 | |
| Sept. 8 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 9 | Sunny | 23° /12° | 0 mm | 6 | |
| Sept. 10 | Sunny | 24° /14° | 0 mm | 6 | |
| Sept. 11 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 12 | Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 13 | Partly cloudy | 26° /15° | 1.4 mm | 7 | |
| Sept. 14 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 15 | Overcast | 26° /15° | 0 mm | 1.2 | |
| Sept. 16 | Patchy rain possible | 19° /16° | 0.1 mm | 1.2 | |
| Sept. 17 | Overcast | 18° /15° | 0 mm | 0.3 | |
| Sept. 18 | Overcast | 27° /16° | 0 mm | 1.5 | |
| Sept. 19 | Sunny | 31° /17° | 0 mm | 0 | |
| Sept. 20 | Sunny | 24° /16° | 0 mm | 5 | |
| Sept. 21 | Sunny | 24° /14° | 0 mm | 5 | |
| Sept. 22 | Sunny | 25° /14° | 0 mm | 5 | |
| Sept. 23 | Sunny | 27° /15° | 0 mm | 6 | |
| Sept. 24 |  Moderate rain | 23° /18° | 7.4 mm | 4 | |
| Sept. 25 | Patchy rain possible | 24° /19° | 2 mm | 5 | |
| Sept. 26 | Moderate rain | 26° /17° | 6.1 mm | 5 | |
| Sept. 27 | Moderate rain | 18° /15° | 14.3 mm | 4 | |
| Sept. 28 | Patchy rain possible | 18° /14° | 0.6 mm | 4 | |
| Sept. 29 | Overcast | 18° /16° | 0 mm | 4 | |
| Sept. 30 |  Light rain | 18° /15° | 6.7 mm | 4 | |
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Glen Mills in September - FAQ
September rainfall patterns in Glen Mills
UV exposure in Glen Mills during September
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Where is Glen Mills?Get accurate weather forecasts for Glen Mills, located at latitude 39.919 and longitude -75.492. Stay updated with localized weather information tailored for Glen Mills.