The Mumbles Weather in September

In The Mumbles, September brings pleasant daytime temperatures around 18°C (64°F), with nights cooling to 13°C (55°F). Expect quite a bit of rainfall this month.

Rainfall in The Mumbles in September

This month experiences about 16 days of rain according to historical data, averaging 106 mm (4.2 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in The Mumbles in September

September in The Mumbles brings typical temperatures with highs around 18°C (64°F) and lows of 13°C (55°F). The summer season takes place during September. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in The Mumbles in September

You can expect a moderate amount of sunlight, with approximately 149 hours. This means a pleasant mix of sun and overcast.

Should you favor a climate that's both dry and comfortably warm, June, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United Kingdom, check out our The Mumbles's climate page.

The Mumbles Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 53%  

Precipitation 106 mm (4.2 in)  

Rainy days 16 days  

Humidity 81% *  

Sunshine 149 hours *  

Percentage Sunshine 37% *  

* Data from: Cardiff, the United Kingdom (48 KM, 30 Miles).

What to Wear in The Mumbles in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in The Mumbles in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our The Mumbles's climate page.

More climate data for The Mumbles

Temperature Rainfall Sunshine Humidity

See the full The Mumbles climate overview or explore weather in the United Kingdom.