Northampton
September
Weather in Northampton for September 2025
Your guide to Northampton weather in September - trends and predictions
In general, the average temperature in Northampton 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 Northampton 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
Northampton 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 Northampton
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 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.
Northampton in September - FAQ
What are the expected maximum and minimum temperatures in Northampton 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 Northampton during September?
In September, Northampton 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 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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