Cornwall
December
Weather in Cornwall for December 2025
Your guide to Cornwall weather in December - trends and predictions
The climate of Cornwall in December is quite snowy, averaging 14 snowy days.
In general, the average temperature in Cornwall at the beginning of December is -0.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 1.3 °C by the end of December.
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Snow Forecast ❄️
Temperatures
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11
Dry days
6
Rainy days
14
Snow days
1°/-4°
Temperatures
16 km/h
Avg max wind
84 %
Avg humidity
Cornwall Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  1° | 3 0° | 4  0° | 5  0° | 6  -3° | |
| 7 -2° | 8 1° | 9 1° | 10  5° | 11  2° | 12  2° | 13 -0° |
| 14 1° | 15  3° | 16 2° | 17  7° | 18  6° | 19  2° | 20  -0° |
| 21 -2° | 22 -4° | 23 -2° | 24 -1° | 25 -1° | 26 0° | 27  0° |
| 28 1° | 29 4° | 30 4° | 31 1° |
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Temperatures trend during December in Cornwall
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. | Fog | 2° /0° | 1.4 mm | 0 cm | |
| 2 Dec. | Light freezing rain | 1° /-2° | 4.4 mm | 1.6 cm | |
| 3 Dec. | Light freezing rain | 0° /-1° | 6.6 mm | 0 cm | |
| 4 Dec. | Moderate snow | 0° /-2° | 10.5 mm | 8.5 cm | |
| 5 Dec. | Light snow | 0° /-4° | 4.8 mm | 3.5 cm | |
| 6 Dec. | Freezing fog | -3° /-11° | 0 mm | 0 cm | |
| 7 Dec. | Light snow | -2° /-11° | 0.2 mm | 0.1 cm | |
| 8 Dec. | Mist | 1° /-7° | 12.3 mm | 8.9 cm | |
| 9 Dec. | Fog | 1° /-4° | 8.7 mm | 3.3 cm | |
| 10 Dec. | Heavy rain | 5° /-1° | 25.7 mm | 1.5 cm | |
| 11 Dec. | Light snow showers | 2° /-2° | 20 mm | 5.7 cm | |
| 12 Dec. | Overcast | 2° /-4° | 9.6 mm | 6.9 cm | |
| 13 Dec. | Light snow showers | 0° /-4° | 0.1 mm | 0.1 cm | |
| 14 Dec. | Overcast | 1° /-6° | 0 mm | 0 cm | |
| 15 Dec. | Sunny | 3° /-4° | 0 mm | 0 cm | |
| 16 Dec. | Overcast | 2° /-2° | 0 mm | 0 cm | |
| 17 Dec. | Patchy rain possible | 7° /0° | 5 mm | 0 cm | |
| 18 Dec. | Moderate rain | 6° /1° | 31.8 mm | 6.2 cm | |
| 19 Dec. | Moderate or heavy snow showers | 2° /-6° | 8.9 mm | 6.7 cm | |
| 20 Dec. | Partly cloudy | 0° /-4° | 0 mm | 0 cm | |
| 21 Dec. | Sunny | -2° /-7° | 0 mm | 0 cm | |
| 22 Dec. | Sunny | -4° /-11° | 0 mm | 0 cm | |
| 23 Dec. | Light freezing rain | -2° /-8° | 1.7 mm | 0.9 cm | |
| 24 Dec. | Fog | -1° /-4° | 12.6 mm | 8.8 cm | |
| 25 Dec. | Fog | -1° /-7° | 0 mm | 0 cm | |
| 26 Dec. | Patchy rain possible | 0° /-4° | 0.3 mm | 0 cm | |
| 27 Dec. | Light rain | 0° /-3° | 6.8 mm | 0 cm | |
| 28 Dec. | Patchy rain possible | 1° /-3° | 1.7 mm | 0 cm | |
| 29 Dec. | Light drizzle | 4° /2° | 13.2 mm | 0 cm | |
| 30 Dec. | Patchy rain possible | 4° /0° | 0.2 mm | 0 cm | |
| 31 Dec. | Sunny | 1° /-2° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Cornwall in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cornwall forecast closer to your planned date for the most up-to-date weather information.
Cornwall in December - FAQ
What are the expected maximum and minimum temperatures in Cornwall during December?
Brace for cold days with temperatures not exceeding 1° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Cornwall during December?
Significant rainfall exceeding 186.3 mm is expected in Cornwall during December, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Cornwall in December 2025?
Cornwall experiences an average snowfall of 62.845 cm during December, occurring over 14 days.
What are the typical wind conditions in Cornwall during December?
The average wind speed in Cornwall during December is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
Cornwall snow forecast December 2025
Track daily snowfall levels and discover Cornwall’s snowy potential this December ❄️
December rainfall patterns in Cornwall
Explore the daily rainfall trends and prepare for Cornwalls December weather 💧
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