easeweather.com
Units
°C
°F
City and County of Swansea
Forecast Today Tomorrow
more
Wales United KingdomUnited States

Weather in City and County of Swansea for September 2025

Your guide to City and County of Swansea weather in September - trends and predictions
  • In general, the average temperature in City and County of Swansea at the beginning of September is 19.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15 °C by the end of September.

  • City and County of Swansea experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.

  • 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
18°/14°
Temperatures
Average wind speed
27 km/h
Avg max wind
Average humidity
82 %
Avg humidity

City and County of Swansea in September average weather

Move between months or click on a day
Select a date

You can click on date

Access City and County of Swansea weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Got it

Temperatures trend during September in City and County of Swansea

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
19° /14° 1.9 mm 4
2 Sept. Partly cloudy
Partly cloudy
18° /13° 1.4 mm 5
3 Sept. Partly cloudy
Partly cloudy
18° /14° 1.2 mm 5
4 Sept. Sunny
Sunny
18° /14° 0.1 mm 5
5 Sept. Sunny
Sunny
20° /14° 9.9 mm 5
6 Sept. Partly cloudy
Partly cloudy
21° /16° 4 mm 5
7 Sept. Light rain shower
Light rain shower
21° /15° 3.2 mm 5
8 Sept. Partly cloudy
Partly cloudy
19° /16° 3 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
19° /14° 0.4 mm 4
10 Sept. Thundery outbreaks possible
Thundery outbreaks possible
18° /13° 1.9 mm 5
11 Sept. Light rain shower
Light rain shower
16° /12° 1.6 mm 4
12 Sept. Cloudy
Cloudy
15° /10° 0.6 mm 4
13 Sept. Partly cloudy
Partly cloudy
15° /10° 0 mm 4
14 Sept. Overcast
Overcast
16° /12° 0 mm 4
15 Sept. Cloudy
Cloudy
17° /13° 0.3 mm 4
16 Sept. Light rain shower
Light rain shower
18° /13° 0.6 mm 5
17 Sept. Light rain shower
Light rain shower
18° /14° 8.5 mm 5
18 Sept. Light rain shower
Light rain shower
18° /13° 3.2 mm 5
19 Sept. Light rain shower
Light rain shower
19° /14° 6.8 mm 5
20 Sept. Light rain shower
Light rain shower
18° /13° 12.3 mm 4
21 Sept. Light rain shower
Light rain shower
17° /12° 10.1 mm 4
22 Sept. Light rain shower
Light rain shower
16° /12° 7.1 mm 4
23 Sept. Cloudy
Cloudy
15° /11° 2.8 mm 4
24 Sept. Light rain shower
Light rain shower
16° /13° 6.3 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
15° /12° 7.6 mm 4
26 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
15° /11° 15.1 mm 4
27 Sept. Light rain shower
Light rain shower
15° /11° 6.1 mm 4
28 Sept. Light rain shower
Light rain shower
14° /11° 4.4 mm 4
29 Sept. Partly cloudy
Partly cloudy
14° /11° 9 mm 4
30 Sept. Patchy rain possible
Patchy rain possible
16° /11° 3.6 mm 4
Next
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.

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 18° and cooler nights around 14°. 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 122.7 mm is expected in City and County of Swansea during September, occurring over more than 21 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 27 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 💧

UV exposure in City and County of Swansea during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in City and County of Swansea
Select a location for an accurate weather forecast
More Locations

Quick links

Location coordinates 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.

Found a mistake?
We appreciate your attention to details. Tell us here.