See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:17
Sunrise
19:02
Sunset
Moon
Waxing Gibbous
18:26
Moonrise
04:08
Moonset
Daily Forecast
Today
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Air Quality Data Available
Upgrade to access real-time air quality data for Castletown.
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Castletown.
View stargazing scoreWeather in Castletown today, September 24, 2026
Castletown is set for a fine, sunny day on September 24, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. Expect a grey start, with morning cloud around 98% by 11:00. Outdoor plans early on should not rely on bright skies.
The temperature range runs from about 12°C up to 16°C. The air stays humid, with relative humidity between 67% and 90% and the peak around 23:00. Winds stay light, near 9.8 km/h by 16:00, so the day feels still more than breezy.
Afternoon skies stay clogged, peaking close to 100% near 13:00. The grey theme continues rather than clearing out. Visibility holds near 32.0 km, though it can fall to 22.1 km. Daylight runs from 07:17 to 19:02, lasting 11 hours 44 minutes of sunlight today.
Taken together, settled sunshine in Castletown on September 24, 2026 makes outdoor timing easier, with highs near 16°C.
Frequently asked questions about weather in Castletown
How warm does it get in Castletown?
The warmest month in Castletown is August, with average high temperatures of 16°C. The average temperature during this period is around 15°C.
How cold does it get in Castletown?
The coldest month in Castletown is February, with average low temperatures of 6°C. The average temperature during this period is around 7°C.
What is the wettest time of year in Castletown?
The wettest month in Castletown is December, with an average of 135mm of precipitation.
What is the driest time of year in Castletown?
The driest month in Castletown is May, with an average of 44mm of precipitation.
