Northampton
September
Weather in Northampton for September 2025
Your guide to Northampton weather in September - trends and predictions
Until now, September 2025 in Northampton is slightly cooler than the historical average by -1.8 °C.
Expect cooler weather in the next days in Northampton with the forecast suggesting a temperature of 17.3 °C, lower than the historical average.
In general, the average temperature in Northampton at the beginning of September is 22.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.1 °C by the end of September.
Northampton in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 79.4 mm.
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Temperatures
Rain 🌧️
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12
Dry days
18
Rainy days
0
Snow days
19°/11°
Temperatures
21 km/h
Avg max wind
76 %
Avg humidity
Northampton Weather September
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Temperatures trend during September in Northampton
See the weather trend as well as the moving average line
September weather in Northampton day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 21° /12° | 1.8 mm | 5 | |
| 2 Sept. | Fog | 21° /12° | 1.2 mm | 5 | |
| 3 Sept. |  Overcast | 21° /12° | 2.6 mm | 5 | |
| 4 Sept. |  Sunny | 20° /12° | 5.4 mm | 5 | |
| 5 Sept. | Sunny | 22° /11° | 3 mm | 5 | |
| 6 Sept. | Overcast | 26° /14° | 1.2 mm | 6 | |
| 7 Sept. |  Partly cloudy | 25° /14° | 0.4 mm | 6 | |
| 8 Sept. |  Patchy rain possible | 23° /14° | 4.7 mm | 5 | |
| 9 Sept. | Sunny | 22° /12° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 22° /12° | 1.6 mm | 6 | |
| 11 Sept. | Light rain shower | 18° /10° | 2.3 mm | 4 | |
| 12 Sept. | Overcast | 16° /9° | 0.7 mm | 4 | |
| 13 Sept. | Overcast | 16° /7° | 0.9 mm | 4 | |
| 14 Sept. | Overcast | 17° /9° | 2.8 mm | 4 | |
| 15 Sept. | Patchy rain possible | 17° /13° | 1.7 mm | 0.8 | |
| 16 Sept. |  Cloudy | 18° /11° | 0.1 mm | 0.8 | |
| 17 Sept. |  Moderate rain | 17° /11° | 9.6 mm | 0.1 | |
| 18 Sept. | Partly cloudy | 24° /16° | 0 mm | 0.8 | |
| 19 Sept. | Partly cloudy | 24° /14° | 0.1 mm | 0.6 | |
| 20 Sept. | Patchy rain possible | 20° /15° | 0 mm | 4 | |
| 21 Sept. | Patchy rain possible | 15° /12° | 0.8 mm | 3 | |
| 22 Sept. | Patchy rain possible | 15° /10° | 3.3 mm | 3 | |
| 23 Sept. | Patchy rain possible | 17° /8° | 2.7 mm | 3 | |
| 24 Sept. | Patchy rain possible | 13° /9° | 1.5 mm | 3 | |
| 25 Sept. | Patchy rain possible | 15° /9° | 0.5 mm | 3 | |
| 26 Sept. | Patchy rain possible | 16° /8° | 0.3 mm | 3 | |
| 27 Sept. | Sunny | 15° /7° | 0 mm | 4 | |
| 28 Sept. | Sunny | 16° /7° | 0 mm | 4 | |
| 29 Sept. | Overcast | 15° /8° | 9.2 mm | 4 | |
| 30 Sept. | Patchy rain possible | 16° /9° | 9.7 mm | 4 | |
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Important Notice
Our weather forecast for Northampton 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
Northampton in September - FAQ
What are the expected maximum and minimum temperatures in Northampton during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Northampton during September?
Moderate rainfall is anticipated in Northampton during September, with a total of 79.4 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Northampton during September?
The average wind speed in Northampton during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Northampton
Explore the daily rainfall trends and prepare for Northamptons September weather 💧
UV exposure in Northampton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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