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United Kingdom weather

Weather in Slough for September 2025

Your guide to Slough weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Slough is slightly cooler than the historical average by -1.8 °C.

  • Expect cooler weather in the next days in Slough with the forecast suggesting a temperature of 18.1 °C, lower than the historical average.

  • In general, the average temperature in Slough at the beginning of September is 22.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.4 °C by the end of September.

    • Rain 🌧️

  • Slough in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 87.2 mm.

    • More

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

Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/12°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Slough Weather September

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

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. Light rain shower
Light rain shower
 22° /13° 7.5 mm 5
2 Sept. Overcast
Overcast
 22° /13° 2.4 mm 5
3 Sept. Overcast
Overcast
 21° /13° 2 mm 5
4 Sept. Light rain shower
Light rain shower
 21° /13° 4.3 mm 5
5 Sept. Sunny
Sunny
 22° /13° 5.5 mm 5
6 Sept. Overcast
Overcast
 24° /14° 2.3 mm 6
7 Sept. Partly cloudy
Partly cloudy
 25° /15° 0.9 mm 6
8 Sept. Partly cloudy
Partly cloudy
 23° /14° 9.4 mm 5
9 Sept. Overcast
Overcast
 23° /13° 0 mm 6
10 Sept. Partly cloudy
Partly cloudy
 22° /13° 2.3 mm 5
11 Sept. Cloudy
Cloudy
 19° /11° 0.8 mm 4
12 Sept. Light rain shower
Light rain shower
 17° /9° 1.3 mm 4
13 Sept. Overcast
Overcast
 17° /9° 1.2 mm 4
14 Sept. Cloudy
Cloudy
 18° /9° 1.1 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 0.5 mm 0.9
16 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 0.1 mm 0.9
17 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 3.5 mm 0.1
18 Sept. Partly cloudy
Partly cloudy
 23° /16° 0 mm 1
19 Sept. Sunny
Sunny
 25° /14° 0 mm 0.7
20 Sept. Patchy rain possible
Patchy rain possible
 19° /15° 0.2 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 0.8 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 15° /11° 1.5 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 1.4 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 1.4 mm 3
25 Sept. Overcast
Overcast
 16° /9° 0.1 mm 3
26 Sept. Cloudy
Cloudy
 17° /9° 0 mm 3
27 Sept. Sunny
Sunny
 17° /8° 0 mm 4
28 Sept. Partly cloudy
Partly cloudy
 17° /8° 0 mm 4
29 Sept. Overcast
Overcast
 16° /9° 1.2 mm 4
30 Sept. Cloudy
Cloudy
 17° /9° 9.2 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 20° 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 87.2 mm spread over approximately 18 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 19 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 💧

UV exposure in Slough during September

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

Quick links

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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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