Merthyr Tydfil Weather and Climate: A Comprehensive Guide
The temperature in Merthyr Tydfil can vary quite a bit throughout the year.
Temperatures can be pleasant during the warmest months,
and cold during the cooler months.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
Visitors to Merthyr Tydfil can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a pleasant 20°C in July, the warmest time of the year, to a chilly 8°C during cooler months like February.
At night, temperatures typically drop to an average of around 2°C during these months.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
Merthyr Tydfil is known for its substantial rain/snowfall, with annual precipitation reaching 1221 mm. Year-round, Merthyr Tydfil has a balanced climate with minimal variation in precipitation. The difference between the wettest month, October, with 122 mm, and the driest month, March, with 85 mm, is minimal.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Merthyr Tydfil. 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
Average humidity
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
partly cloudy and no rain partly cloudy and chance of rain overcast and no rainForecast for Merthyr Tydfil
5 m/s
6 m/s
6 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Merthyr Tydfil in the United Kingdom
Other facts from our historical weather data:July has an average maximum temperature of 20°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 8°C.
October tops the wettest month list with 122 mm of rainfall.
March is the driest month with 85 mm of precipitation.
July is the sunniest month with an average of 202 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
