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EnglandThe weather in December in Cornwall
It's cool in December in Cornwall with an average temperature of 11°C. Temperatures this month range from a low of 10°C to a high of 12°C. At night, you can expect temperatures between 6°C and 10°C.
Looking for sun? December isn’t a good month to be in Cornwall. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Cornwall, England. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 15°C in 2015, Cornwall reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 3°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 13°C.
Rainfall amount
In December, there is an average of 126 mm of precipitation, spread over 16 days. The wind speed is around 5 Bft, mostly coming from the Southwest.
Daily weather in December for Cornwall
Click on any day in December to get detailed info about the usual weather on that day in Cornwall. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Cornwall | New York | |
|---|---|---|
| Average temperature | 11°C | 9°C |
| Max. temperature | 12°C | 12°C |
| Min. temperature | 6°C | -5°C |
| Total precipitation | 126 mm | 133 mm |
| Rainy days | 16 days | 17 days |
Start of December
The month of December starts in Cornwall with cold temps, averaging around 11°C during the day and nights around 7°C.
Mid December
By mid-December, daytime temps rise to around 12°C, with nights around 8°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of December
By the end of December, the average daytime temperature in Cornwall is around 12°C, while nighttime temps are about 8°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Find affordable vacations to Cornwall
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Check out the climate of Cornwall for all months and discover the best travel time
Curious about the weather in other parts of England? Check out the climate and weather for spots like London, Edinburgh, Devon, or explore other destinations in England.
Temperature charts
These charts show the average temperatures in December in Cornwall, England. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Cornwall
Temperature in December in Cornwall over the years
Precipitation charts
These charts show the average amount of precipitation in December in Cornwall, England. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Cornwall
Total precipitation in December in Cornwall over the years
Daily UV index in December in Cornwall
This chart shows the average daily UV index in December in Cornwall, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Cornwall
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Average weather in Cornwall by month
Click on a month below to see detailed weather info for Cornwall. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.