Llantrisant Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Llantrisant.
Climate overview of Llantrisant
Llantrisant, Glamorgan, United Kingdom, sees big temperature differences between seasons, with July peaking at 20°C (68°F) and February dropping to 9°C (48°F).
Rainfall is high, totalling around 1155 mm (45 in) per year. December is the wettest month and March the driest. The most sunshine falls in July, with an average of 6.7 hours of daily sunshine.
Llantrisant Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Llantrisant — and find the best time to visit.
Monthly Temperature in Llantrisant
Visitors to Llantrisant can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in July, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like February.
At night, you can expect temperatures ranging from 13°C (55°F) in July to around 3°C (37°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Llantrisant
Llantrisant is known for its substantial rainfall, with annual precipitation reaching 1155 mm (45 in). Year-round, Llantrisant has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 120 mm (4.7 in), and the driest month, March, with 78 mm (3.1 in), is minimal. For more details, please visit our Llantrisant 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 Llantrisant
Seasonal changes in sunshine hours are quite dramatic in Llantrisant. While July receives considerable daily sunshine with up to 6.7 hours, December marks the darkest time of the year, where sunshine is scarce 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 Llantrisant
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 Llantrisant 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 Llantrisant
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 Llantrisant
The weather does bring rainfall during this period, between 85 mm (3.3 in) and 97 mm (3.8 in). Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in Llantrisant
What is the best time to visit Llantrisant?
July and August typically offer the most optimal weather in Llantrisant. In contrast, January, February, November and December tend to have less optimal conditions.
What temperatures can I expect in Llantrisant?
Daytime highs range from 9°C (48°F) in February to 20°C (68°F) in July. Nighttime lows range from 3°C (37°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Llantrisant get?
Annual rainfall is around 1155 mm (45 in). December is the wettest month with 120 mm (4.7 in), while March is the driest with 78 mm (3.1 in).
How sunny is Llantrisant?
Llantrisant 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.
Llantrisant 3-Day Forecast
Llantrisant 3-Day Forecast
Llantrisant on the map
Llantrisant is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
London
23°C (73°F) Bath22°C (72°F) York22°C (72°F) Manchester
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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