Northamptonshire (Northampton)
September
Weather in Northamptonshire for September 2026
Your guide to Northamptonshire weather in September - trends and predictions
Until now, September 2026 in Northamptonshire is slightly cooler than the historical average by 0.7 °C.
The forecast for the next days in Northamptonshire predicts temperatures to be around 22 °C, close to the historical average.
In general, the average temperature in Northamptonshire at the beginning of September is 22 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 22.7 °C by the end of September.
Northamptonshire experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 70.3 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
19°/11°
Temperatures
22 km/h
Avg max wind
75 %
Avg humidity
Northamptonshire Weather September
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Temperatures trend during September in Northamptonshire
See the weather trend as well as the moving average line
September weather in Northamptonshire day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 21° /11° | 1.3 mm | 5 | |
| 2 Sept. | Fog | 20° /12° | 1 mm | 4 | |
| 3 Sept. |  Overcast | 22° /13° | 2.1 mm | 4 | |
| 4 Sept. |  Sunny | 20° /12° | 4.7 mm | 4 | |
| 5 Sept. | Sunny | 21° /11° | 2.2 mm | 5 | |
| 6 Sept. | Overcast | 26° /13° | 1.2 mm | 5 | |
| 7 Sept. |  Partly cloudy | 24° /14° | 0.4 mm | 5 | |
| 8 Sept. |  Patchy rain possible | 21° /13° | 5.8 mm | 5 | |
| 9 Sept. | Sunny | 21° /11° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 22° /11° | 1.5 mm | 5 | |
| 11 Sept. | Light rain shower | 18° /10° | 1.8 mm | 4 | |
| 12 Sept. | Overcast | 18° /9° | 4 mm | 3 | |
| 13 Sept. | Overcast | 17° /9° | 2.4 mm | 3 | |
| 14 Sept. | Overcast | 18° /10° | 2.3 mm | 4 | |
| 15 Sept. | Partly cloudy | 20° /11° | 0.4 mm | 4 | |
| 16 Sept. | Overcast | 19° /10° | 0.1 mm | 4 | |
| 17 Sept. | Light rain shower | 19° /10° | 2.8 mm | 4 | |
| 18 Sept. |  Light rain | 20° /11° | 0.7 mm | 4 | |
| 19 Sept. | Overcast | 22° /12° | 0.4 mm | 4 | |
| 20 Sept. | Overcast | 18° /11° | 0 mm | 3.6 | |
| 21 Sept. | Sunny | 21° /10° | 0 mm | 3.9 | |
| 22 Sept. | Sunny | 24° /15° | 0.1 mm | 3.6 | |
| 23 Sept. | Overcast | 21° /10° | 0.1 mm | 3.3 | |
| 24 Sept. | Sunny | 19° /8° | 0 mm | 5 | |
| 25 Sept. | Sunny | 20° /10° | 0 mm | 5 | |
| 26 Sept. | Overcast | 26° /11° | 0 mm | 7 | |
| 27 Sept. | Overcast | 21° /14° | 0 mm | 6 | |
| 28 Sept. | Sunny | 25° /15° | 0 mm | 6 | |
| 29 Sept. | Sunny | 25° /13° | 0 mm | 7 | |
| 30 Sept. | Overcast | 23° /16° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Northamptonshire 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 Northamptonshire forecast closer to your planned date for the most up-to-date weather information.
Change Month
Northamptonshire in September - FAQ
What are the expected maximum and minimum temperatures in Northamptonshire 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 Northamptonshire during September?
Moderate rainfall is anticipated in Northamptonshire during September, with a total of 70.3 mm spread over approximately 21 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Northamptonshire during September?
The average wind speed in Northamptonshire during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Northamptonshire
Explore the daily rainfall trends and prepare for Northamptonshires September weather 💧
Typically, Northamptonshire has 21 rainy days in September with a total of 70.3 mm of rainfall.
UV exposure in Northamptonshire during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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