December · United Kingdom
Best time to visit Cornwall in December Weather, crowds & prices
Weather in Cornwall in December
Average temperature 9°C, 134 mm of rain, about 0 days with 6+ hours of sunshine and 87% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
1.0/10
Ranked #11 of 12 months
- Avg temp
- 9°C
- Rainfall
- 134 mm
- Humidity
- 87%
- Days with 6h+ sun
- 0
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Cornwall scores 1.0/10 for beach and coastal travel - ranked #11 of 12. Expect around 9°C, 134 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Cornwall's granite cliffs, surf beaches and fishing harbours fill England's south-west tip.
December in Cornwall — off-season conditions
December averages 9°C (49°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 134 mm this is a genuinely wet month: almost no days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 1/10 here, 11th of 12 months, against 6.4/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? August scores 5.4 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Cornwall in December?
- In December, Cornwall averages 9°C, 134 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 1.0/10.
- Is December a good time to visit Cornwall?
- December earns a 1.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cornwall in December?
- Expect about 134 mm of rain in December. Average humidity is 87% and there are about 0 days with 6+ hours of sunshine.
Curated in Cornwall
Tickets & experiences
Things to do in Cornwall
Cornwall, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.