Llantwit Major Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Llantwit Major.
Climate overview of Llantwit Major
Llantwit Major, Glamorgan, United Kingdom, experiences moderate temperature changes through the seasons. August is the warmest month with daytime highs of 20°C (68°F), while January is the coolest at 9°C (48°F).
With around 1180 mm (46 in) of annual rainfall, Llantwit Major has a notably wet climate. However, this rainfall is not evenly distributed — the city has pleasant summers and cold winters. The wettest month is December. Sunshine peaks in July, when the city sees around 6.7 hours of sunshine per day.
Llantwit Major Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Llantwit Major - and find the best time to visit.
Monthly Temperature in Llantwit Major
The weather in Llantwit Major changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 20°C (68°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 14°C (57°F) in August to 4°C (39°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Llantwit Major
Llantwit Major has a relatively rainy climate with high precipitation levels, averaging 1180 mm (46 in) of rainfall annually. Despite minor fluctuations, Llantwit Major enjoys fairly consistent precipitation throughout the year. In December, you can expect around 126 mm (5 in) of precipitation, while in April, Llantwit Major receives about 78 mm (3.1 in). For more details, please visit our Llantwit Major Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Llantwit Major
Llantwit Major can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 6.7 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Llantwit Major
The mean water temperature over the year ranges from 7°C (45°F) in February to 16°C (61°F) in August.
Water temperature over the year
Humidity in Llantwit Major by Month
The city experiences its highest humidity in January, reaching 89%. In June, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Llantwit Major
The mean wind speed varies between 4 m/s (8 knots) and 5 m/s (10 knots) throughout the year. It is lowest in May, June, July, August and September and highest during January, February, March, April, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Llantwit Major
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July
- Warmest weather: July and August
- Most sunshine: May, June and July
- Warmest water temperature: July, August and September, although the water may still feel cool.
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Llantwit Major
What is the best time to visit Llantwit Major?
July typically offers the most optimal weather in Llantwit Major. In contrast, January, February, November and December tend to have less optimal conditions. Llantwit Major has pleasant summers and cold winters.
What temperatures can I expect in Llantwit Major?
Daytime highs range from 9°C (48°F) in January to 20°C (68°F) in August. Nighttime lows range from 4°C (39°F) to 14°C (57°F).
How much rain does Llantwit Major get?
Annual rainfall is around 1180 mm (46 in). December is the wettest month with 126 mm (5 in), while April is the driest with 78 mm (3.1 in).
How sunny is Llantwit Major?
Llantwit Major receives around 1,573 hours of sunshine per year. July is the sunniest month with 202 hours, while December is the cloudiest with just 49 hours.
Llantwit Major 3-Day Forecast
Llantwit Major 3-Day Forecast
Llantwit Major on the map
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Popular this month
Where to go in July - average daytime high across popular destinations.
London
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21°C (70°F) Edinburgh
19°C (66°F) Glasgow19°C (66°F) Torquay20°C (68°F) Blackpool19°C (66°F) 
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