City and County of Swansea (Swansea)
September
Weather in City and County of Swansea for September 2026
Your guide to City and County of Swansea weather in September - trends and predictions
Until now, September 2026 in City and County of Swansea is slightly cooler than the historical average by 1 °C.
Expect cooler weather in the next days in City and County of Swansea with the forecast suggesting a temperature of 17 °C, lower than the historical average.
In general, the average temperature in City and County of Swansea at the beginning of September is 18.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.3 °C by the end of September.
City and County of Swansea experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 144.8 mm.
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Temperatures
Rain 🌧️
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0
Dry days
30
Rainy days
0
Snow days
17°/13°
Temperatures
28 km/h
Avg max wind
80 %
Avg humidity
City and County of Swansea Weather September
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Temperatures trend during September in City and County of Swansea
See the weather trend as well as the moving average line
September weather in City and County of Swansea day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 18° /14° | 4.7 mm | 3 | |
| 2 Sept. | Light rain shower | 18° /14° | 2.8 mm | 4 | |
| 3 Sept. |  Partly cloudy | 18° /15° | 6.2 mm | 4 | |
| 4 Sept. | Patchy rain possible | 18° /14° | 2.6 mm | 4 | |
| 5 Sept. |  Sunny | 18° /13° | 4.9 mm | 4 | |
| 6 Sept. |  Overcast | 20° /15° | 2 mm | 4 | |
| 7 Sept. | Light rain shower | 20° /15° | 4.2 mm | 4 | |
| 8 Sept. | Partly cloudy | 18° /14° | 8.2 mm | 4 | |
| 9 Sept. | Patchy rain possible | 17° /13° | 1.1 mm | 3 | |
| 10 Sept. | Light rain shower | 18° /13° | 4 mm | 4 | |
| 11 Sept. | Patchy rain possible | 17° /11° | 0.3 mm | 4 | |
| 12 Sept. | Light rain shower | 18° /10° | 5 mm | 2.1 | |
| 13 Sept. | Patchy rain possible | 19° /14° | 0.6 mm | 2.9 | |
| 14 Sept. |  Fog | 21° /13° | 1.1 mm | 3.5 | |
| 15 Sept. | Patchy rain possible | 18° /11° | 2.1 mm | 5 | |
| 16 Sept. | Patchy rain possible | 14° /11° | 0.2 mm | 3 | |
| 17 Sept. | Overcast | 15° /11° | 1.7 mm | 3 | |
| 18 Sept. | Light rain shower | 16° /11° | 4.2 mm | 4 | |
| 19 Sept. | Patchy rain possible | 16° /10° | 0.2 mm | 5 | |
| 20 Sept. | Partly cloudy | 17° /10° | 1.4 mm | 5 | |
| 21 Sept. | Sunny | 14° /8° | 0 mm | 4 | |
| 22 Sept. | Sunny | 17° /7° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 20° /8° | 0.2 mm | 4 | |
| 24 Sept. | Patchy rain possible | 16° /10° | 5 mm | 3 | |
| 25 Sept. | Patchy rain possible | 16° /11° | 5.1 mm | 4 | |
| 26 Sept. |  Moderate or heavy rain with thunder | 15° /10° | 10.1 mm | 3 | |
| 27 Sept. | Light rain shower | 15° /11° | 5.1 mm | 3 | |
| 28 Sept. | Light rain shower | 15° /11° | 3 mm | 4 | |
| 29 Sept. | Partly cloudy | 14° /10° | 6 mm | 4 | |
| 30 Sept. | Patchy rain possible | 16° /11° | 2.4 mm | 4 | |
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Important Notice
Our weather forecast for City and County of Swansea 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 City and County of Swansea forecast closer to your planned date for the most up-to-date weather information.
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City and County of Swansea in September - FAQ
What are the expected maximum and minimum temperatures in City and County of Swansea during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in City and County of Swansea during September?
Significant rainfall exceeding 144.8 mm is expected in City and County of Swansea during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in City and County of Swansea during September?
The average wind speed in City and County of Swansea during September is 28 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in City and County of Swansea
Explore the daily rainfall trends and prepare for City and County of Swanseas September weather 💧
Typically, City and County of Swansea has 30 rainy days in September with a total of 144.8 mm of rainfall.
UV exposure in City and County of Swansea during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is City and County of Swansea?Get accurate weather forecasts for City and County of Swansea, located at latitude 51.621 and longitude -3.943. Stay updated with localized weather information tailored for City and County of Swansea.
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