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Llanharan, Rhondda Cynon Taff has a temperate maritime climate, with mild winters and warm summers.
In winter, the average temperature is around 5°C (41°F), while in summer, it averages around 17°C (63°F). Average precipitation varies from month to month, with December usually being the wettest month, with an average rainfall of 83mm (3.3in). January and February are usually the driest months, with an average rainfall of 44mm (1.7in).
Snow is not common in Llanharan, with an average of only 1 day of snowfall during the winter months.
Spring in Llanharan is usually mild, with temperatures gradually increasing from April to June, when the average temperature is usually around 13°C (55°F). Average precipitation is around 54mm (2.1in) in April, and decreases to 43mm (1.7in) by June.
Summer in Llanharan is generally warm and sunny, with an average temperature of around 17°C (63°F). Average precipitation is around 62mm (2.4in) in July and August, but can vary significantly from month to month.
Autumn in Llanharan is usually mild, with temperatures gradually decreasing from September to November, when the average temperature is usually around 9°C (48°F). Average precipitation is around 66mm (2.6in) in September, and decreases to 62mm (2.4in) by November.
As of 2020, the city population is 3465.
This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Llanharan, Rhondda Cynon Taff.