December
Weather in St Helier for December 2025
Your guide to St Helier weather in December - trends and predictions
In general, the average temperature in St Helier at the beginning of December is 11.3 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 11.4 °C by the end of December.
St Helier experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 148.5 mm.
Temperatures
Rain 🌧️
8
Dry days
23
Rainy days
0
Snow days
11°/9°
Temperatures
46 km/h
Avg max wind
80 %
Avg humidity
St Helier in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  10° | 2 10° | 3 11° | 4  12° | 5 12° | 6 11° | 7  13° |
| 8 11° | 9  12° | 10 12° | 11 11° | 12 10° | 13 10° | 14 11° |
| 15 12° | 16  11° | 17 11° | 18 12° | 19 13° | 20 11° | 21 12° |
| 22  12° | 23 12° | 24 12° | 25 12° | 26 11° | 27 11° | 28  11° |
| 29 11° | 30 12° | 31 12° |
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Temperatures trend during December in St Helier
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. | Patchy rain possible | 10° /9° | 3.3 mm | 3 | |
| 2 Dec. | Patchy rain possible | 10° /6° | 2 mm | 3 | |
| 3 Dec. | Light rain shower | 11° /8° | 6.5 mm | 3 | |
| 4 Dec. | Moderate or heavy rain with thunder | 12° /9° | 6.6 mm | 3 | |
| 5 Dec. | Light rain shower | 12° /10° | 7.5 mm | 3 | |
| 6 Dec. | Patchy rain possible | 11° /9° | 0.3 mm | 3 | |
| 7 Dec. | Moderate rain | 13° /7° | 12.3 mm | 3 | |
| 8 Dec. | Light rain shower | 11° /9° | 4.9 mm | 3 | |
| 9 Dec. | Light rain | 12° /9° | 8.5 mm | 3 | |
| 10 Dec. | Light rain | 12° /9° | 6.5 mm | 3 | |
| 11 Dec. | Patchy light drizzle | 11° /9° | 1.2 mm | 3 | |
| 12 Dec. | Light rain shower | 10° /8° | 3.1 mm | 3 | |
| 13 Dec. | Light rain shower | 10° /7° | 3.3 mm | 3 | |
| 14 Dec. | Patchy rain possible | 11° /8° | 1.9 mm | 3 | |
| 15 Dec. | Patchy rain possible | 12° /9° | 0.5 mm | 3 | |
| 16 Dec. | Sunny | 11° /9° | 0.1 mm | 4 | |
| 17 Dec. | Sunny | 11° /8° | 1 mm | 4 | |
| 18 Dec. | Patchy rain possible | 12° /10° | 1.6 mm | 3 | |
| 19 Dec. | Moderate rain | 13° /9° | 6.1 mm | 3 | |
| 20 Dec. | Patchy rain possible | 11° /9° | 2.6 mm | 3 | |
| 21 Dec. | Patchy rain possible | 12° /10° | 3.2 mm | 3 | |
| 22 Dec. | Moderate or heavy rain shower | 12° /9° | 5.6 mm | 3 | |
| 23 Dec. | Patchy rain possible | 12° /9° | 4 mm | 3 | |
| 24 Dec. | Moderate rain at times | 12° /10° | 1.6 mm | 3 | |
| 25 Dec. | Patchy rain possible | 12° /10° | 5.3 mm | 3 | |
| 26 Dec. | Patchy rain possible | 11° /9° | 0.6 mm | 3 | |
| 27 Dec. | Patchy rain possible | 11° /9° | 1.9 mm | 3 | |
| 28 Dec. | Heavy rain at times | 11° /9° | 3.9 mm | 3 | |
| 29 Dec. | Moderate rain at times | 11° /9° | 3.4 mm | 3 | |
| 30 Dec. | Patchy rain possible | 12° /8° | 8.7 mm | 3 | |
| 31 Dec. | Moderate or heavy rain shower | 12° /9° | 11.1 mm | 3 | |
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Important Notice
Our weather forecast for St Helier 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 St Helier forecast closer to your planned date for the most up-to-date weather information.
St Helier in December - FAQ
What are the expected maximum and minimum temperatures in St Helier 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 St Helier during December?
Significant rainfall exceeding 148.5 mm is expected in St Helier during December, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St Helier during December?
The average wind speed in St Helier during December is 46 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in St Helier
Explore the daily rainfall trends and prepare for St Heliers December weather 💧
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