Weather in Frederick, Maryland for September 2025
Until now, September 2025 in Frederick has been nearly identical to the historical average, with a temperature of 25.5 °F (showing only a slight deviation of -0.2 °F).
The forecast for the next days in Frederick predicts temperatures to be around 25 °F, close to the historical average.
In general, the average temperature in Frederick at the beginning of September is 25.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.4 °F by the end of September.
Frederick experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 188.5 mm.
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Frederick Weather September
Temperatures trend during September in Frederick
September weather in Frederick day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 25° /15° | 1.8 mm | 6 | |
| Sept. 2 |  Overcast | 24° /13° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 23° /11° | 0 mm | 6 | |
| Sept. 4 | Overcast | 27° /13° | 24.2 mm | 6 | |
| Sept. 5 |  Mist | 28° /14° | 4.3 mm | 7 | |
| Sept. 6 | Patchy rain possible | 27° /15° | 3.8 mm | 6 | |
| Sept. 7 |  Patchy light drizzle | 22° /12° | 0.3 mm | 5 | |
| Sept. 8 | Sunny | 22° /7° | 0 mm | 6 | |
| Sept. 9 | Sunny | 24° /8° | 0 mm | 7 | |
| Sept. 10 | Sunny | 26° /9° | 0 mm | 6 | |
| Sept. 11 | Sunny | 27° /12° | 0 mm | 7 | |
| Sept. 12 | Sunny | 26° /13° | 0 mm | 7 | |
| Sept. 13 | Mist | 27° /14° | 0 mm | 7 | |
| Sept. 14 | Mist | 29° /16° | 0 mm | 6 | |
| Sept. 15 | Sunny | 28° /13° | 2.8 mm | 7 | |
| Sept. 16 | Overcast | 23° /13° | 2.2 mm | 5 | |
| Sept. 17 | Patchy rain possible | 19° /12° | 1.1 mm | 0.3 | |
| Sept. 18 |  Cloudy | 30° /18° | 0 mm | 1.1 | |
| Sept. 19 | Patchy rain possible | 32° /16° | 3.5 mm | 1.5 | |
| Sept. 20 | Overcast | 27° /14° | 0 mm | 1.5 | |
| Sept. 21 | Overcast | 22° /14° | 0.1 mm | 0 | |
| Sept. 22 | Mist | 27° /17° | 0.1 mm | 4 | |
| Sept. 23 |  Partly cloudy | 27° /15° | 0 mm | 6 | |
| Sept. 24 | Partly cloudy | 28° /17° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 27° /18° | 0.4 mm | 5 | |
| Sept. 26 | Patchy rain possible | 27° /18° | 4.5 mm | 5 | |
| Sept. 27 | Patchy rain possible | 21° /18° | 4.7 mm | 4 | |
| Sept. 28 | Patchy rain possible | 25° /19° | 2.6 mm | 5 | |
| Sept. 29 | Patchy rain possible | 21° /18° | 2.7 mm | 4 | |
| Sept. 30 |  Moderate rain | 22° /17° | 7 mm | 4 | |
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Frederick in September - FAQ
September rainfall patterns in Frederick
UV exposure in Frederick during September
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Where is Frederick?Get accurate weather forecasts for Frederick, located at latitude 39.414 and longitude -77.411. Stay updated with localized weather information tailored for Frederick.