Castlebar Weather & Climate: Best Time to Visit

In Castlebar, seasonal changes bring about a moderate variation in temperatures. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).

At night, temperatures range from around 12°C (54°F) in July to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Castlebar has a relatively rainy climate with high precipitation levels, averaging 1261 mm (50 in) of rainfall annually. Despite minor fluctuations, Castlebar enjoys fairly consistent precipitation throughout the year. In December, you can expect around 122 mm (4.8 in) of precipitation, while in April, Castlebar receives about 90 mm (3.5 in). For more details, please visit our Castlebar Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Castlebar can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 5.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.2 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

The city experiences its highest humidity in January, reaching 90%. In May, 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