Castletown Weather in December

Castletown in December sees low daytime temperatures of 9°C (48°F) and nighttime lows of 4°C (39°F). Rainfall is fairly high this month at around 89 mm (3.5 in), so pack a rain jacket to stay dry.

Rainfall in Castletown in December

Historically, December sees about 23 days of rain, with a monthly average of 89 mm (3.5 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Castletown in December

December in Castletown sees highs of 9°C (48°F) and lows of 4°C (39°F) overnight. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Castletown in December

The city usually sees around 29 hours of sunlight, indicating fewer sunny days.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Castletown. Our weather planner can help you explore destinations with more pleasant weather conditions.