Weather in Northampton County, Pennsylvania for September 2025
Rip Current Statement - See hour by hour.
Until now, September 2025 in Northampton County is slightly cooler than the historical average by -0.7 °F.
The forecast for the upcoming days in Northampton County predicts a temperature of 26.1 °F, which is slightly above the historical average.
In general, the average temperature in Northampton County at the beginning of September is 24.4 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 25.1 °F by the end of September.
Northampton County experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 76.4 mm.
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Northampton County Weather September
Temperatures trend during September in Northampton County
September weather in Northampton County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 26° /16° | 1.3 mm | 6 | |
| Sept. 2 |  Overcast | 24° /14° | 0 mm | 6 | |
| Sept. 3 |  Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 4 | Sunny | 25° /11° | 3.2 mm | 6 | |
| Sept. 5 | Sunny | 27° /14° | 14.8 mm | 6 | |
| Sept. 6 | Overcast | 26° /14° | 1.8 mm | 6 | |
| Sept. 7 | Moderate or heavy rain shower | 20° /12° | 20.2 mm | 5 | |
| Sept. 8 | Sunny | 22° /8° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 24° /9° | 0 mm | 6 | |
| Sept. 10 | Sunny | 23° /11° | 0 mm | 6 | |
| Sept. 11 | Partly cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 12 | Sunny | 25° /13° | 0 mm | 7 | |
| Sept. 13 | Sunny | 26° /14° | 13.2 mm | 6 | |
| Sept. 14 | Partly cloudy | 29° /15° | 0 mm | 7 | |
| Sept. 15 | Partly cloudy | 26° /17° | 0 mm | 1.4 | |
| Sept. 16 |  Cloudy | 26° /14° | 0 mm | 1.4 | |
| Sept. 17 | Cloudy | 20° /12° | 0 mm | 0.4 | |
| Sept. 18 | Sunny | 29° /15° | 0 mm | 1.5 | |
| Sept. 19 | Sunny | 29° /15° | 0 mm | 0 | |
| Sept. 20 | Sunny | 21° /8° | 0 mm | 4 | |
| Sept. 21 | Sunny | 22° /6° | 0 mm | 4 | |
| Sept. 22 | Sunny | 24° /9° | 0 mm | 5 | |
| Sept. 23 | Sunny | 27° /11° | 0 mm | 5 | |
| Sept. 24 | Sunny | 29° /15° | 0 mm | 6 | |
| Sept. 25 | Sunny | 26° /14° | 0 mm | 5 | |
| Sept. 26 | Partly cloudy | 27° /13° | 0 mm | 5 | |
| Sept. 27 | Sunny | 30° /14° | 0 mm | 6 | |
| Sept. 28 | Sunny | 29° /15° | 0 mm | 6 | |
| Sept. 29 | Moderate rain at times | 17° /15° | 2.5 mm | 4 | |
| Sept. 30 | Cloudy | 18° /14° | 0 mm | 4 | |
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Northampton County in September - FAQ
September rainfall patterns in Northampton County
UV exposure in Northampton County during September
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Where is Northampton County?Get accurate weather forecasts for Northampton County, located at latitude 40.688 and longitude -75.221. Stay updated with localized weather information tailored for Northampton County.