Castlerock Weather in December
What's the weather like in Castlerock (N Ireland) in December 2024?
The climate in Castlerock during December can be summarized as cool and damp.
December is in the winter in Castlerock and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 7°C (45°F), whilst at night 2°C (35°F) is normal.
| Daytime temperature | 7.2°C 44.9°F |
|---|---|
| Nightly temperature | 1.9°C 35.3°F |
| Average temperature | 4.5°C 40.1°F |
| Daily sunshine | 1.2 hrs |
| Avg rainfall | 119 mm 4.7 ins |
| Rainy days | 22 days |
| Sea temperature | 10.1°C 50.1°F |
| Humidity | 92% |
| Windspeed | 26.3kph 16 mph |
On average December is the 3rd wettest month of the year in Castlerock with around 119mm 4.7 inches of rain making it a damp time to visit. This rainfall is typically spread over 22 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.2 hours of sunshine per day.
December temperatures in Castlerock
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Castlerock in December 2024.
Other monthly averages
Best places to visit in December
Castlerock weather stats
| Hottest month: | July | 17.1°C 62.8°F |
|---|---|---|
| Driest month: | April | 69mm 2.7ins |
| Sunniest month: | May | 6.1hrs |
| Coldest month: | January | 6.2°C 43.2°F |
| Wettest month: | January | 128mm 5ins |
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