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United Kingdom weather

Weather in Slough for September 2026

Your guide to Slough weather in September - trends and predictions

    Temperatures

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

  • The forecast for the next days in Slough predicts temperatures to be around 21 °C, close to the historical average.

  • In general, the average temperature in Slough at the beginning of September is 22.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19 °C by the end of September.

    • Rain 🌧️

  • Slough experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 70.7 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°/12°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Slough Weather September

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

Temperatures trend during September in Slough

See the weather trend as well as the moving average line

September weather in Slough day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 22° /12° 5.7 mm 5
2 Sept. Overcast
Overcast
 21° /13° 1.9 mm 4
3 Sept. Overcast
Overcast
 22° /13° 1.6 mm 4
4 Sept. Light rain shower
Light rain shower
 21° /13° 3.3 mm 4
5 Sept. Sunny
Sunny
 22° /12° 4.1 mm 5
6 Sept. Overcast
Overcast
 25° /14° 1.7 mm 5
7 Sept. Partly cloudy
Partly cloudy
 25° /15° 0.7 mm 5
8 Sept. Partly cloudy
Partly cloudy
 22° /14° 10.7 mm 5
9 Sept. Overcast
Overcast
 21° /12° 0 mm 5
10 Sept. Partly cloudy
Partly cloudy
 22° /12° 2.1 mm 4
11 Sept. Cloudy
Cloudy
 19° /11° 0.8 mm 4
12 Sept. Overcast
Overcast
 24° /12° 0 mm 4.3
13 Sept. Patchy rain possible
Patchy rain possible
 21° /17° 2.1 mm 3.1
14 Sept. Sunny
Sunny
 25° /15° 0 mm 3.7
15 Sept. Sunny
Sunny
 25° /14° 2 mm 6
16 Sept. Sunny
Sunny
 18° /11° 0.6 mm 5
17 Sept. Overcast
Overcast
 18° /10° 0 mm 4
18 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 0 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 3.1 mm 5
20 Sept. Overcast
Overcast
 18° /11° 0.8 mm 5
21 Sept. Sunny
Sunny
 18° /12° 5.4 mm 5
22 Sept. Overcast
Overcast
 20° /12° 0 mm 5
23 Sept. Overcast
Overcast
 23° /14° 0 mm 6
24 Sept. Overcast
Overcast
 24° /15° 0 mm 6
25 Sept. Overcast
Overcast
 23° /16° 0 mm 5
26 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 18° /10° 4 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 16° /9° 3.2 mm 4
28 Sept. Overcast
Overcast
 17° /9° 0 mm 4
29 Sept. Overcast
Overcast
 17° /8° 0.8 mm 4
30 Sept. Cloudy
Cloudy
 18° /9° 6.1 mm 4
Next
Important Notice
Our weather forecast for Slough 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 Slough forecast closer to your planned date for the most up-to-date weather information.
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Slough in September - FAQ

What are the expected maximum and minimum temperatures in Slough during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Slough during September?
Moderate rainfall is anticipated in Slough during September, with a total of 70.7 mm spread over approximately 21 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Slough during September?
The average wind speed in Slough during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Slough

Explore the daily rainfall trends and prepare for Sloughs September weather 💧
Typically, Slough has 21 rainy days in September with a total of 70.7 mm of rainfall.

UV exposure in Slough during September

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

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Location coordinates Where is Slough?

Get accurate weather forecasts for Slough, located at latitude 51.509 and longitude -0.595. Stay updated with localized weather information tailored for Slough.

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