Cornwall in December
The weather in December
In December, Cornwall averages daytime highs of 1° and night-time lows of -5° — freezing weather by day. Expect around 124 mm of precipitation spread over about 16 wet days, with average cloud cover near 56%.
Days are 5.7° cooler than in November on average, and January is cooler again by about 3.6°. The sea averages 2°, too cold for most swimmers.
December scores 14/100 — poor conditions for sightseeing — and ranks 12th of the twelve months for Cornwall. For the most comfortable weather, consider July, August and September instead.
Around the middle of the month the sun rises at 07:50 and sets at 16:28 local time, giving 8 h 38 min of daylight. Days shorten by 14 minutes over the month.
Why 14/100?
How the score for December is builtBeach score this month: 9/100 (adds sea temperature and heat).
Comfort peaks for daytime highs between 18° and 25°C (64–77°F).
Around Cornwall this month
Charlottetown
Summerside
Canada's best in December
Lethbridge
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Swift Current
Cornwall in December: quick answers
Is December a good time to visit Cornwall?
December scores 14/100 for Cornwall, which we rate as poor. Average highs are 1°C with 16 wet days.
How warm is Cornwall in December?
Daytime highs average 1°C and night-time lows -5°C in December.
Does it rain a lot in Cornwall in December?
Cornwall receives about 124 mm of precipitation in December, falling on around 16 days.
Can you swim in Cornwall in December?
The sea averages 2°C in December, cold for most swimmers.