Northamptonshire
September
Weather in Northamptonshire for September 2025
Your guide to Northamptonshire weather in September - trends and predictions
In general, the average temperature in Northamptonshire at the beginning of September is 23.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.
The climate of Northamptonshire in September is notably wet, with an average of 11 rainy days.
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19
Dry days
11
Rainy days
0
Snow days
21°/12°
Temperatures
21 km/h
Avg max wind
74 %
Avg humidity
Northamptonshire in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2 23° | 3  21° | 4  21° | 5 22° | 6 28° | 7  26° |
| 8 24° | 9 23° | 10 23° | 11  18° | 12 15° | 13 16° | 14 16° |
| 15 21° | 16 20° | 17 20° | 18  19° | 19 20° | 20 19° | 21 20° |
| 22 17° | 23 17° | 24 17° | 25 17° | 26 19° | 27 15° | 28 15° |
| 29 15° | 30 16° |
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Temperatures trend during September in Northamptonshire
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Mist | 21° /12° | 2.5 mm | 5 | |
| 2 Sept. | Fog | 23° /13° | 0.1 mm | 5 | |
| 3 Sept. | Overcast | 21° /12° | 0.1 mm | 5 | |
| 4 Sept. | Sunny | 21° /13° | 2.2 mm | 6 | |
| 5 Sept. | Sunny | 22° /12° | 4.5 mm | 6 | |
| 6 Sept. | Sunny | 28° /15° | 1.9 mm | 7 | |
| 7 Sept. | Partly cloudy | 26° /15° | 0.3 mm | 7 | |
| 8 Sept. | Partly cloudy | 24° /16° | 7 mm | 6 | |
| 9 Sept. | Sunny | 23° /14° | 0 mm | 6 | |
| 10 Sept. | Partly cloudy | 23° /13° | 1 mm | 6 | |
| 11 Sept. | Patchy rain possible | 18° /11° | 2.2 mm | 4 | |
| 12 Sept. | Overcast | 15° /9° | 0.3 mm | 4 | |
| 13 Sept. | Overcast | 16° /6° | 0 mm | 4 | |
| 14 Sept. | Overcast | 16° /9° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 21° /10° | 0.1 mm | 5 | |
| 16 Sept. | Overcast | 20° /10° | 0 mm | 5 | |
| 17 Sept. | Light rain shower | 20° /10° | 1.2 mm | 5 | |
| 18 Sept. | Light rain | 19° /11° | 0.6 mm | 5 | |
| 19 Sept. | Light rain | 20° /11° | 0.6 mm | 5 | |
| 20 Sept. | Light rain shower | 19° /11° | 5.8 mm | 5 | |
| 21 Sept. | Patchy light drizzle | 20° /10° | 5.1 mm | 5 | |
| 22 Sept. | Patchy rain possible | 17° /10° | 9.5 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /11° | 3.9 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /11° | 1.2 mm | 4 | |
| 25 Sept. | Overcast | 17° /11° | 3.7 mm | 4 | |
| 26 Sept. | Patchy light drizzle | 19° /10° | 3.3 mm | 5 | |
| 27 Sept. | Patchy rain possible | 15° /7° | 2.8 mm | 4 | |
| 28 Sept. | Overcast | 15° /8° | 0.4 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 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.
Northamptonshire in September - FAQ
What are the expected maximum and minimum temperatures in Northamptonshire during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Northamptonshire during September?
In September, Northamptonshire can expect light to moderate rainfall, totaling 37.3 mm across approximately 11 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Northamptonshire during September?
The average wind speed in Northamptonshire during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
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