Northampton County (Easton)
September
Weather in Northampton County, Pennsylvania for September 2026
Your guide to Northampton County weather in September - trends and predictions
So far, September 2026 in Northampton County is slightly warmer than the historical average by 1.3 °F.
The forecast for the upcoming days in Northampton County predicts a temperature of 21.2 °F, which is slightly above the historical average.
In general, the average temperature in Northampton County at the beginning of September is 25.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.3 °F by the end of September.
The climate of Northampton County in September is notably wet, with an average of 14 rainy days, and a total of 158.7 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
14
Rainy days
0
Snow days
23°/14°
Temperatures
13 km/h
Avg max wind
76 %
Avg humidity
Northampton County Weather September
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Temperatures trend during September in Northampton County
See the weather trend as well as the moving average line
September weather in Northampton County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 29° /17° | 2 mm | 4 | |
| Sept. 2 |  Overcast | 24° /15° | 1.2 mm | 4 | |
| Sept. 3 |  Sunny | 25° /13° | 10 mm | 4 | |
| Sept. 4 | Sunny | 27° /14° | 2.2 mm | 7 | |
| Sept. 5 | Sunny | 27° /15° | 9.9 mm | 6 | |
| Sept. 6 | Overcast | 26° /14° | 1.3 mm | 6 | |
| Sept. 7 | Moderate or heavy rain shower | 23° /12° | 13.5 mm | 6 | |
| Sept. 8 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 26° /11° | 0.1 mm | 5 | |
| Sept. 10 | Sunny | 26° /14° | 0.4 mm | 5 | |
| Sept. 11 | Partly cloudy | 26° /14° | 0 mm | 6 | |
| Sept. 12 | Sunny | 26° /12° | 0 mm | 6 | |
| Sept. 13 | Sunny | 26° /15° | 12.7 mm | 5 | |
| Sept. 14 | Partly cloudy | 27° /14° | 0 mm | 7 | |
| Sept. 15 |  Patchy rain possible | 24° /13° | 0 mm | 6 | |
| Sept. 16 | Overcast | 25° /12° | 0 mm | 5 | |
| Sept. 17 | Overcast | 24° /15° | 2 mm | 4 | |
| Sept. 18 | Overcast | 25° /16° | 0 mm | 5 | |
| Sept. 19 | Overcast | 25° /14° | 0 mm | 5 | |
| Sept. 20 | Overcast | 22° /14° | 6.2 mm | 4 | |
| Sept. 21 | Overcast | 20° /14° | 0.1 mm | 3.5 | |
| Sept. 22 |  Light drizzle | 13° /9° | 9.3 mm | 0.5 | |
| Sept. 23 | Overcast | 18° /8° | 0.2 mm | 4.6 | |
| Sept. 24 | Overcast | 18° /7° | 0 mm | 3.5 | |
| Sept. 25 | Overcast | 21° /7° | 0 mm | 5 | |
| Sept. 26 | Overcast | 20° /12° | 0 mm | 4 | |
| Sept. 27 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 28 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 29 | Sunny | 21° /9° | 0 mm | 6 | |
| Sept. 30 | Sunny | 25° /13° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Northampton County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Northampton County forecast closer to your planned date for the most up-to-date weather information.
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Northampton County in September - FAQ
What are the expected maximum and minimum temperatures in Northampton County during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Northampton County during September?
Significant rainfall exceeding 158.7 mm is expected in Northampton County during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Northampton County during September?
The average wind speed in Northampton County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Northampton County
Explore the daily rainfall trends and prepare for Northampton Countys September weather 💧
Typically, Northampton County has 14 rainy days in September with a total of 158.7 mm of rainfall.
UV exposure in Northampton County during September
Stay informed about UV levels for safe outdoor activities throughout the month of 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.
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