Castletown Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castletown.
Climate overview of Castletown
Castletown, Highlands, United Kingdom, experiences moderate temperature changes through the seasons. August is the warmest month with daytime highs of 17°C (63°F), while February is the coolest at 8°C (46°F).
Rainfall is high, totalling around 1016 mm (40 in) per year. October is the wettest month and April the driest. The sunniest month is May, with 6.5 hours of sunshine per day on average.
Castletown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castletown — and find the best time to visit.
Monthly Temperature in Castletown
The weather in Castletown changes moderately throughout the year, offering enough variation to appreciate each season. Average maximum daytime temperatures range from a moderate 17°C (63°F) in August, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like February.
At night, you can expect temperatures ranging from 12°C (54°F) in August to around 4°C (39°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castletown
Castletown has a relatively rainy climate with high precipitation levels, averaging 1016 mm (40 in) of rainfall annually. Year-round, Castletown has a balanced climate with minimal variation in precipitation. The difference between the wettest month, October, with 107 mm (4.2 in), and the driest month, April, with 68 mm (2.7 in), is minimal. For more details, please visit our Castletown 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 Castletown
Seasonal changes in sunshine hours are quite dramatic in Castletown. While May receives considerable daily sunshine with up to 6.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.0 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
Best Time to Visit Castletown
Rainfall during this time ranges from 79 mm (3.1 in) in July to 86 mm (3.4 in) in August. This means you can expect a mix of sunny days and occasional showers. 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 Castletown
What is the best time to visit Castletown?
June, July, August and September typically offer the most optimal weather in Castletown. In contrast, January, February, March, October and December tend to have less optimal conditions.
What temperatures can I expect in Castletown?
Daytime highs range from 8°C (46°F) in February to 17°C (63°F) in August. Nighttime lows range from 4°C (39°F) to 12°C (54°F).
How much rain does Castletown get?
Annual rainfall is around 1016 mm (40 in). October is the wettest month with 107 mm (4.2 in), while April is the driest with 68 mm (2.7 in).
How sunny is Castletown?
Castletown receives around 1,234 hours of sunshine per year. May is the sunniest month with 195 hours, while December is the cloudiest with just 29 hours.
Castletown 3-Day Forecast
Castletown 3-Day Forecast
Castletown on the map
Castletown 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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