Northern Ireland (Belfast)
December
Weather in Northern Ireland for December 2025
Your guide to Northern Ireland weather in December - trends and predictions
In general, the average temperature in Northern Ireland at the beginning of December is 7.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 8.6 °C by the end of December.
Northern Ireland experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 288.6 mm.
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Temperatures
Rain 🌧️
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10
Dry days
21
Rainy days
0
Snow days
10°/2°
Temperatures
31 km/h
Avg max wind
86 %
Avg humidity
Northern Ireland Weather December
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  8° | 2  6° | 3  5° | 4 7° | 5 8° | 6  10° | 7 10° |
| 8  8° | 9 8° | 10 7° | 11 6° | 12 7° | 13 5° | 14 7° |
| 15 10° | 16 11° | 17 12° | 18 13° | 19 7° | 20 9° | 21 11° |
| 22  8° | 23 10° | 24 11° | 25 10° | 26 7° | 27  10° | 28 9° |
| 29 7° | 30 9° | 31 8° |
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Temperatures trend during December in Northern Ireland
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. | Cloudy | 8° /2° | 2.1 mm | 0 cm | |
| 2 Dec. | Overcast | 6° /0° | 0.5 mm | 0 cm | |
| 3 Dec. | Light rain shower | 5° /0° | 4.3 mm | 0 cm | |
| 4 Dec. | Light rain shower | 7° /2° | 2.5 mm | 0 cm | |
| 5 Dec. | Light rain shower | 8° /4° | 6.3 mm | 0 cm | |
| 6 Dec. | Moderate rain | 10° /3° | 17.3 mm | 0 cm | |
| 7 Dec. | Light rain shower | 10° /5° | 13.6 mm | 0 cm | |
| 8 Dec. | Light rain | 8° /5° | 2.7 mm | 0 cm | |
| 9 Dec. | Light rain shower | 8° /4° | 3.1 mm | 0 cm | |
| 10 Dec. | Light rain | 7° /2° | 2.5 mm | 0 cm | |
| 11 Dec. | Overcast | 6° /2° | 5.2 mm | 0 cm | |
| 12 Dec. | Light rain shower | 7° /2° | 5.9 mm | 0 cm | |
| 13 Dec. | Patchy rain possible | 5° /2° | 0.3 mm | 0 cm | |
| 14 Dec. | Overcast | 7° /3° | 0.3 mm | 0 cm | |
| 15 Dec. | Overcast | 10° /7° | 0 mm | 0 cm | |
| 16 Dec. | Cloudy | 11° /7° | 0 mm | 0 cm | |
| 17 Dec. | Light drizzle | 12° /7° | 2.2 mm | 0 cm | |
| 18 Dec. | Light drizzle | 13° /5° | 1.2 mm | 0 cm | |
| 19 Dec. | Patchy rain possible | 7° /3° | 0.5 mm | 0 cm | |
| 20 Dec. | Light drizzle | 9° /4° | 1.5 mm | 0 cm | |
| 21 Dec. | Light rain shower | 11° /5° | 3.6 mm | 0 cm | |
| 22 Dec. | Heavy rain at times | 8° /4° | 3.1 mm | 0.1 cm | |
| 23 Dec. | Light rain | 10° /5° | 6.1 mm | 0 cm | |
| 24 Dec. | Patchy rain possible | 11° /7° | 1.6 mm | 0 cm | |
| 25 Dec. | Heavy rain at times | 10° /4° | 3.2 mm | 0 cm | |
| 26 Dec. | Patchy rain possible | 7° /3° | 1 mm | 0 cm | |
| 27 Dec. | Moderate or heavy rain shower | 10° /4° | 13.6 mm | 0 cm | |
| 28 Dec. | Moderate or heavy rain shower | 9° /4° | 2.9 mm | 0 cm | |
| 29 Dec. | Heavy rain at times | 7° /3° | 1 mm | 0 cm | |
| 30 Dec. | Moderate or heavy rain shower | 9° /3° | 10.3 mm | 0 cm | |
| 31 Dec. | Patchy rain possible | 8° /4° | 3 mm | 0 cm | |
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Important Notice
Our weather forecast for Northern Ireland 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 Northern Ireland forecast closer to your planned date for the most up-to-date weather information.
Northern Ireland in December - FAQ
What are the expected maximum and minimum temperatures in Northern Ireland during December?
Prepare for cooler days with highs just around 10° and colder nights, dipping below 2°.
How much rainfall should be expected in Northern Ireland during December?
Significant rainfall exceeding 288.6 mm is expected in Northern Ireland during December, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Northern Ireland in December 2025?
Northern Ireland typically sees 0.3 cm of snowfall during December.
What are the typical wind conditions in Northern Ireland during December?
The average wind speed in Northern Ireland during December is 31 km/h, suggesting breezy to windy conditions, depending on your activities.
Northern Ireland snow forecast December 2025
Track daily snowfall levels and discover Northern Ireland’s snowy potential this December ❄️
December rainfall patterns in Northern Ireland
Explore the daily rainfall trends and prepare for Northern Irelands December weather 💧
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