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Weather in Northampton for September 2026

Your guide to Northampton weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Northampton is slightly cooler than the historical average by 1.3 °C.

  • Expect cooler weather in the next days in Northampton with the forecast suggesting a temperature of 18.9 °C, lower than the historical average.

  • In general, the average temperature in Northampton at the beginning of September is 22 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.1 °C by the end of September.

    • Rain 🌧️

  • Northampton experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 70.3 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/11°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Northampton Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
21°
2
Fog
20°
3
Overcast
22°
4
Sunny
20°
5
Sunny
21°
6
Overcast
26°
7
Partly cloudy
24°
8
Patchy rain possible
21°
9
Sunny
21°
10
Light rain shower
22°
11
Light rain shower
18°
12
Overcast
18°
13
Overcast
17°
14
Patchy rain possible
24°
15
Sunny
20°
16
Sunny
16°
17
Overcast
17°
18
Sunny
16°
19
Sunny
18°
20
Sunny
21°
21
Patchy rain possible
18°
22
Overcast
16°
23
Partly cloudy
18°
24
Sunny
20°
25
Sunny
20°
26
Sunny
20°
27
Sunny
21°
28
Overcast
15°
29
Overcast
15°
30
Patchy rain possible
16°

Temperatures trend during September in Northampton

See the weather trend as well as the moving average line

September weather in Northampton day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 21° /11° 1.3 mm 5
2 Sept. Fog
Fog
 20° /12° 1 mm 4
3 Sept. Overcast
Overcast
 22° /13° 2.1 mm 4
4 Sept. Sunny
Sunny
 20° /12° 4.7 mm 4
5 Sept. Sunny
Sunny
 21° /11° 2.2 mm 5
6 Sept. Overcast
Overcast
 26° /13° 1.2 mm 5
7 Sept. Partly cloudy
Partly cloudy
 24° /14° 0.4 mm 5
8 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 5.8 mm 5
9 Sept. Sunny
Sunny
 21° /11° 0 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /11° 1.5 mm 5
11 Sept. Light rain shower
Light rain shower
 18° /10° 1.8 mm 4
12 Sept. Overcast
Overcast
 18° /9° 4 mm 3
13 Sept. Overcast
Overcast
 17° /9° 2.4 mm 3
14 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 0.5 mm 2.9
15 Sept. Sunny
Sunny
 20° /13° 0.4 mm 3.1
16 Sept. Sunny
Sunny
 16° /10° 0.1 mm 1.9
17 Sept. Overcast
Overcast
 17° /10° 0.7 mm 5
18 Sept. Sunny
Sunny
 16° /8° 0 mm 4
19 Sept. Sunny
Sunny
 18° /12° 0.2 mm 5
20 Sept. Sunny
Sunny
 21° /10° 0 mm 6
21 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 0.1 mm 5
22 Sept. Overcast
Overcast
 16° /8° 0 mm 5
23 Sept. Partly cloudy
Partly cloudy
 18° /9° 0 mm 5
24 Sept. Sunny
Sunny
 20° /8° 0 mm 5
25 Sept. Sunny
Sunny
 20° /11° 0 mm 5
26 Sept. Sunny
Sunny
 20° /10° 0 mm 6
27 Sept. Sunny
Sunny
 21° /9° 0 mm 6
28 Sept. Overcast
Overcast
 15° /8° 0.5 mm 4
29 Sept. Overcast
Overcast
 15° /7° 6.2 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
 16° /9° 6.5 mm 4
Next
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.
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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 70.3 mm spread over approximately 21 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 22 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 💧
Typically, Northampton has 21 rainy days in September with a total of 70.3 mm of rainfall.

UV exposure in Northampton during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Northampton, located at latitude 52.25 and longitude -0.883. Stay updated with localized weather information tailored for Northampton.

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