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Rhondda Cynon Taf (Rhondda)
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Weather in Rhondda Cynon Taf for September 2025

Your guide to Rhondda Cynon Taf weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Rainstorm Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Rhondda Cynon Taf is cooler than usual, with temperatures averaging 14.6 °C, this is -2.3 °C below the typical seasonal average.

  • The forecast for the next days in Rhondda Cynon Taf predicts temperatures to be around 14 °C, close to the historical average.

  • In general, the average temperature in Rhondda Cynon Taf at the beginning of September is 18.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.6 °C by the end of September.

    • Rain 🌧️

  • Rhondda Cynon Taf experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 116 mm.

    • More

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

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/10°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Rhondda Cynon Taf Weather September

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

Temperatures trend during September in Rhondda Cynon Taf

See the weather trend as well as the moving average line

September weather in Rhondda Cynon Taf 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
 17° /10° 4.2 mm 4
2 Sept. Light rain shower
Light rain shower
 18° /10° 2 mm 4
3 Sept. Cloudy
Cloudy
 18° /11° 7.7 mm 4
4 Sept. Sunny
Sunny
 18° /11° 1.6 mm 4
5 Sept. Sunny
Sunny
 18° /10° 7.7 mm 4
6 Sept. Overcast
Overcast
 21° /13° 2 mm 4
7 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 2.9 mm 4
8 Sept. Light rain shower
Light rain shower
 19° /12° 5.7 mm 5
9 Sept. Sunny
Sunny
 18° /11° 1.5 mm 5
10 Sept. Light rain shower
Light rain shower
 16° /10° 2.6 mm 4
11 Sept. Light rain shower
Light rain shower
 14° /9° 3.4 mm 3
12 Sept. Fog
Fog
 13° /7° 3.7 mm 3
13 Sept. Mist
Mist
 14° /6° 3.4 mm 3
14 Sept. Fog
Fog
 14° /8° 13 mm 3
15 Sept. Partly cloudy
Partly cloudy
 16° /9° 1.4 mm 4
16 Sept. Light rain shower
Light rain shower
 16° /9° 0.7 mm 4
17 Sept. Light rain shower
Light rain shower
 16° /9° 5.9 mm 5
18 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 2.8 mm 0.5
19 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.1 mm 1
20 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 2.6 mm 0.3
21 Sept. Moderate rain
Moderate rain
 12° /9° 7.8 mm 0.2
22 Sept. Patchy rain possible
Patchy rain possible
 10° /9° 2.8 mm 2
23 Sept. Partly cloudy
Partly cloudy
 11° /6° 0 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 11° /5° 1.5 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 3.2 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 1.3 mm 3
27 Sept. Cloudy
Cloudy
 13° /7° 0 mm 3
28 Sept. Partly cloudy
Partly cloudy
 13° /6° 0.1 mm 3
29 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 0.2 mm 2
30 Sept. Partly cloudy
Partly cloudy
 12° /5° 0 mm 3
Next
Important Notice
Our weather forecast for Rhondda Cynon Taf 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 Rhondda Cynon Taf forecast closer to your planned date for the most up-to-date weather information.
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Rhondda Cynon Taf in September - FAQ

What are the expected maximum and minimum temperatures in Rhondda Cynon Taf during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rhondda Cynon Taf during September?
Significant rainfall exceeding 116 mm is expected in Rhondda Cynon Taf during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rhondda Cynon Taf during September?
The average wind speed in Rhondda Cynon Taf during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Rhondda Cynon Taf

Explore the daily rainfall trends and prepare for Rhondda Cynon Tafs September weather 💧

UV exposure in Rhondda Cynon Taf during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Rhondda Cynon Taf?

Get accurate weather forecasts for Rhondda Cynon Taf, located at latitude 51.659 and longitude -3.449. Stay updated with localized weather information tailored for Rhondda Cynon Taf.

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