Saint Athan Weather in December

December in Saint Athan brings low temperatures, with highs of 10°C (50°F) and nights dropping to 5°C (41°F). It's the rainiest month of the year, so come prepared with waterproof gear.

Rainfall in Saint Athan in December

This month is known for heavy rainfall, so don't forget your umbrella to stay dry. Records from the past 30 years suggest around 20 days of rain, with 122 mm (4.8 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Saint Athan in December

Expect highs of 10°C (50°F) in Saint Athan in December, with nights dropping to around 5°C (41°F). December is in the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Saint Athan in December

The city usually sees around 49 hours of sunlight, indicating fewer sunny days.

Wind Speed in Saint Athan in December

Wind speeds average 5 m/s (10 knots) during December. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

Average water temperature in December

With water temperatures around 10°C (50°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

December in Saint Athan can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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

Saint Athan Temperature in December

Min Temperature 5°C (41°F)  

Max Temperature 10°C (50°F)  

Water Temperature 10°C (50°F) *  

Chance of Rain 66%  

Precipitation 122 mm (4.8 in)  

Rainy days 20 days  

Humidity 89% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 49 hours *  

Percentage Sunshine 19% *  

* Data from: Cardiff, the United Kingdom (4 KM, 3 Miles).

What to Wear in Saint Athan in December

Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 10°C (50°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.

What To Do in Saint Athan in December

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

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

3/10

Outdoor sports

4/10

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 Saint Athan's climate page.

More climate data for Saint Athan

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Saint Athan climate overview or explore weather in the United Kingdom.