Cornwall (St Ives)
December
Weather in Cornwall for December 2025
Your guide to Cornwall weather in December - trends and predictions
In general, the average temperature in Cornwall at the beginning of December is 11.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 10.7 °C by the end of December.
Cornwall experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 67.6 mm.
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Temperatures
Rain 🌧️
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9
Dry days
22
Rainy days
0
Snow days
11°/9°
Temperatures
38 km/h
Avg max wind
81 %
Avg humidity
Cornwall Weather December
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  13° | 2 10° | 3  9° | 4 13° | 5 13° | 6 13° | 7 11° |
| 8 9° | 9 9° | 10 8° | 11  7° | 12 9° | 13 9° | 14 9° |
| 15 11° | 16 11° | 17 13° | 18  13° | 19 8° | 20 11° | 21 12° |
| 22 9° | 23 11° | 24 12° | 25 12° | 26 12° | 27 10° | 28 10° |
| 29  10° | 30 10° | 31 11° |
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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 | UV | More |
|---|---|---|---|---|---|
| 1 Dec. | Light rain shower | 13° /11° | 3 mm | 3 | |
| 2 Dec. | Light rain shower | 10° /8° | 1.3 mm | 3 | |
| 3 Dec. | Light drizzle | 9° /6° | 1 mm | 2 | |
| 4 Dec. | Light rain shower | 13° /11° | 3.9 mm | 3 | |
| 5 Dec. | Light rain | 13° /11° | 5.7 mm | 3 | |
| 6 Dec. | Light drizzle | 13° /8° | 4.7 mm | 3 | |
| 7 Dec. | Light rain shower | 11° /8° | 1.8 mm | 3 | |
| 8 Dec. | Patchy rain possible | 9° /8° | 0.8 mm | 2 | |
| 9 Dec. | Patchy rain possible | 9° /7° | 0.8 mm | 2 | |
| 10 Dec. | Patchy rain possible | 8° /7° | 0.1 mm | 2 | |
| 11 Dec. | Partly cloudy | 7° /5° | 0 mm | 3 | |
| 12 Dec. | Patchy rain possible | 9° /7° | 0.4 mm | 2 | |
| 13 Dec. | Light rain shower | 9° /8° | 3.2 mm | 2 | |
| 14 Dec. | Light rain shower | 9° /8° | 1.2 mm | 2 | |
| 15 Dec. | Patchy rain possible | 11° /10° | 0.3 mm | 3 | |
| 16 Dec. | Patchy rain possible | 11° /10° | 0.5 mm | 3 | |
| 17 Dec. | Light rain | 13° /11° | 6.8 mm | 3 | |
| 18 Dec. | Moderate or heavy rain with thunder | 13° /9° | 15.9 mm | 3 | |
| 19 Dec. | Light rain shower | 8° /8° | 3.4 mm | 2 | |
| 20 Dec. | Light rain shower | 11° /8° | 1.5 mm | 3 | |
| 21 Dec. | Light rain | 12° /9° | 2.8 mm | 3 | |
| 22 Dec. | Light rain shower | 9° /7° | 5.3 mm | 2 | |
| 23 Dec. | Light drizzle | 11° /8° | 1.7 mm | 3 | |
| 24 Dec. | Patchy rain possible | 12° /10° | 0.1 mm | 3 | |
| 25 Dec. | Patchy rain possible | 12° /10° | 0.3 mm | 3 | |
| 26 Dec. | Patchy rain possible | 12° /10° | 0.2 mm | 3 | |
| 27 Dec. | Patchy rain possible | 10° /9° | 0.1 mm | 3 | |
| 28 Dec. | Patchy rain possible | 10° /8° | 0.1 mm | 3 | |
| 29 Dec. | Mist | 10° /8° | 0 mm | 3 | |
| 30 Dec. | Patchy rain possible | 10° /8° | 0.3 mm | 3 | |
| 31 Dec. | Patchy rain possible | 11° /10° | 0.3 mm | 3 | |
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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?
During December, expect a variety of temperatures with highs around 11° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cornwall during December?
Moderate rainfall is anticipated in Cornwall during December, with a total of 67.6 mm spread over approximately 22 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cornwall during December?
The average wind speed in Cornwall during December is 38 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Cornwall
Explore the daily rainfall trends and prepare for Cornwalls December weather 💧
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