Rhondda Cynon Taf
September
Weather in Rhondda Cynon Taf for September 2025
Your guide to Rhondda Cynon Taf weather in September - trends and predictions
In general, the average temperature in Rhondda Cynon Taf at the beginning of September is 19.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.3 °C by the end of September.
Expect significant rainfall in Rhondda Cynon Taf during September, with an average of 19 rainy days.
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11
Dry days
19
Rainy days
0
Snow days
18°/11°
Temperatures
21 km/h
Avg max wind
86 %
Avg humidity
Rhondda Cynon Taf in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2 18° | 3  19° | 4  19° | 5 19° | 6  22° | 7 21° |
| 8  20° | 9 20° | 10 17° | 11 15° | 12  13° | 13 14° | 14 14° |
| 15 17° | 16 17° | 17 16° | 18 17° | 19 18° | 20 17° | 21 16° |
| 22 14° | 23 14° | 24  14° | 25 13° | 26 14° | 27 13° | 28 13° |
| 29 12° | 30 14° |
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Temperatures trend during September in Rhondda Cynon Taf
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. | Light rain shower | 19° /11° | 2.2 mm | 5 | |
| 2 Sept. | Light rain shower | 18° /10° | 1.1 mm | 5 | |
| 3 Sept. | Cloudy | 19° /11° | 0.4 mm | 5 | |
| 4 Sept. | Sunny | 19° /11° | 0.2 mm | 5 | |
| 5 Sept. | Sunny | 19° /11° | 11.6 mm | 5 | |
| 6 Sept. | Overcast | 22° /15° | 3.1 mm | 5 | |
| 7 Sept. | Patchy rain possible | 21° /14° | 0.9 mm | 5 | |
| 8 Sept. | Partly cloudy | 20° /14° | 7 mm | 6 | |
| 9 Sept. | Sunny | 20° /13° | 0.9 mm | 5 | |
| 10 Sept. | Patchy rain possible | 17° /10° | 1.3 mm | 4 | |
| 11 Sept. | Light rain shower | 15° /10° | 1.6 mm | 4 | |
| 12 Sept. | Fog | 13° /7° | 0.5 mm | 4 | |
| 13 Sept. | Mist | 14° /6° | 0 mm | 4 | |
| 14 Sept. | Fog | 14° /8° | 0 mm | 3 | |
| 15 Sept. | Partly cloudy | 17° /9° | 0.1 mm | 4 | |
| 16 Sept. | Light rain shower | 17° /9° | 0.7 mm | 5 | |
| 17 Sept. | Light rain shower | 16° /9° | 5.9 mm | 5 | |
| 18 Sept. | Light rain shower | 17° /9° | 1.7 mm | 4 | |
| 19 Sept. | Light rain shower | 18° /10° | 7.5 mm | 4 | |
| 20 Sept. | Light rain shower | 17° /9° | 13.7 mm | 4 | |
| 21 Sept. | Light rain shower | 16° /8° | 3.9 mm | 4 | |
| 22 Sept. | Light rain shower | 14° /9° | 3.5 mm | 4 | |
| 23 Sept. | Overcast | 14° /8° | 2.2 mm | 4 | |
| 24 Sept. | Light rain | 14° /10° | 11.2 mm | 4 | |
| 25 Sept. | Patchy rain possible | 13° /9° | 4.9 mm | 4 | |
| 26 Sept. | Light rain shower | 14° /9° | 10.3 mm | 4 | |
| 27 Sept. | Light rain shower | 13° /6° | 5.6 mm | 3 | |
| 28 Sept. | Light rain shower | 13° /7° | 2.4 mm | 3 | |
| 29 Sept. | Mist | 12° /6° | 8.7 mm | 3 | |
| 30 Sept. | Patchy rain possible | 14° /8° | 3.1 mm | 4 | |
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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.
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 18° and cooler nights around 11°. 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 109.8 mm is expected in Rhondda Cynon Taf during September, occurring over more than 19 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 21 km/h, suggesting breezy to windy conditions, depending on your activities.
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