December
Weather in St Helier for December 2025
Your guide to St Helier weather in December - trends and predictions
Until now, December 2025 in St Helier has been nearly identical to the historical average, with a temperature of 11.8 °C (showing only a slight deviation of 0.3 °C).
The forecast for the next days in St Helier predicts temperatures to be around 9 °C, close to the historical average.
In general, the average temperature in St Helier at the beginning of December is 11.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 8.9 °C by the end of December.
St Helier experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 129 mm.
Temperatures
Rain 🌧️
4
Dry days
27
Rainy days
0
Snow days
11°/9°
Temperatures
44 km/h
Avg max wind
79 %
Avg humidity
St Helier Weather December
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Temperatures trend during December in St Helier
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December weather in St Helier day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 11° /9° | 3.5 mm | 3 | |
| 2 Dec. | Light rain shower | 10° /7° | 2.1 mm | 3 | |
| 3 Dec. | Light rain shower | 11° /8° | 5.2 mm | 3 | |
| 4 Dec. |  Moderate or heavy rain with thunder | 12° /9° | 9 mm | 3 | |
| 5 Dec. | Light rain shower | 13° /9° | 8.3 mm | 3 | |
| 6 Dec. | Patchy rain possible | 12° /9° | 1.3 mm | 3 | |
| 7 Dec. |  Moderate rain | 13° /8° | 12.2 mm | 3 | |
| 8 Dec. | Light rain shower | 12° /10° | 6.1 mm | 3 | |
| 9 Dec. |  Light rain | 12° /10° | 7 mm | 3 | |
| 10 Dec. | Light rain | 12° /9° | 4.3 mm | 3 | |
| 11 Dec. | Patchy light drizzle | 11° /9° | 0.8 mm | 3 | |
| 12 Dec. | Light rain shower | 10° /9° | 2.3 mm | 3 | |
| 13 Dec. | Light rain shower | 11° /8° | 2.2 mm | 3 | |
| 14 Dec. | Patchy rain possible | 11° /8° | 1.3 mm | 3 | |
| 15 Dec. | Patchy rain possible | 12° /9° | 0.6 mm | 3 | |
| 16 Dec. |  Sunny | 11° /9° | 1.1 mm | 3 | |
| 17 Dec. | Sunny | 11° /8° | 0.8 mm | 3 | |
| 18 Dec. | Patchy rain possible | 12° /10° | 1.6 mm | 3 | |
| 19 Dec. | Patchy rain possible | 11° /10° | 0.9 mm | 0.1 | |
| 20 Dec. | Patchy rain possible | 9° /8° | 0.6 mm | 0.1 | |
| 21 Dec. | Moderate rain | 10° /9° | 6 mm | 0.1 | |
| 22 Dec. | Patchy rain possible | 8° /7° | 1.4 mm | 0.1 | |
| 23 Dec. | Patchy rain possible | 8° /7° | 0.1 mm | 2 | |
| 24 Dec. | Patchy rain possible | 10° /8° | 3.4 mm | 2 | |
| 25 Dec. | Patchy rain possible | 10° /9° | 0.5 mm | 2 | |
| 26 Dec. |  Partly cloudy | 9° /8° | 0.1 mm | 3 | |
| 27 Dec. | Partly cloudy | 9° /7° | 0 mm | 3 | |
| 28 Dec. | Patchy rain possible | 10° /8° | 2.6 mm | 2 | |
| 29 Dec. | Patchy rain possible | 9° /8° | 0.3 mm | 2 | |
| 30 Dec. | Patchy rain possible | 8° /7° | 0.5 mm | 2 | |
| 31 Dec. | Patchy rain possible | 7° /6° | 0.4 mm | 2 | |
| Next | |||||
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.
Change Month
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 129 mm is expected in St Helier during December, occurring over more than 27 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 44 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 💧
Typically, St Helier has 27 rainy days in December with a total of 129 mm of rainfall.
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