Belfast
December
Weather in Belfast for December 2025
Your guide to Belfast weather in December - trends and predictions
Yellow Rain Warning - See hour by hour.
So far, December 2025 in Belfast is slightly warmer than the historical average by 0.7 °C.
The forecast for the next days in Belfast predicts temperatures to be around 8 °C, close to the historical average.
In general, the average temperature in Belfast at the beginning of December is 8.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 7.4 °C by the end of December.
Belfast experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 288.6 mm.
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Temperatures
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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
Belfast Weather December
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Temperatures trend during December in Belfast
See the weather trend as well as the moving average line
December weather in Belfast day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Cloudy | 9° /3° | 5.1 mm | 2 | |
| 2 Dec. |  Overcast | 6° /1° | 0.3 mm | 2 | |
| 3 Dec. |  Light rain shower | 6° /1° | 3.9 mm | 2 | |
| 4 Dec. | Light rain shower | 7° /1° | 3.5 mm | 2 | |
| 5 Dec. | Light rain shower | 9° /3° | 9.5 mm | 2 | |
| 6 Dec. |  Moderate rain | 10° /4° | 14 mm | 2 | |
| 7 Dec. | Light rain shower | 10° /5° | 15.3 mm | 3 | |
| 8 Dec. |  Light rain | 8° /5° | 3.2 mm | 2 | |
| 9 Dec. | Light rain shower | 10° /5° | 8.2 mm | 3 | |
| 10 Dec. | Light rain | 8° /4° | 1.7 mm | 2 | |
| 11 Dec. | Overcast | 8° /3° | 4.9 mm | 2 | |
| 12 Dec. | Light rain shower | 7° /2° | 3.9 mm | 2 | |
| 13 Dec. | Patchy rain possible | 7° /2° | 0.7 mm | 2 | |
| 14 Dec. | Patchy rain possible | 12° /8° | 4.6 mm | 0 | |
| 15 Dec. |  Partly cloudy | 7° /4° | 0.1 mm | 0.1 | |
| 16 Dec. |  Sunny | 5° /2° | 0 mm | 0.1 | |
| 17 Dec. | Moderate rain | 9° /2° | 6.5 mm | 0 | |
| 18 Dec. | Moderate rain | 11° /5° | 17.9 mm | 0 | |
| 19 Dec. | Partly cloudy | 9° /3° | 0.1 mm | 3 | |
| 20 Dec. | Cloudy | 8° /2° | 0 mm | 2 | |
| 21 Dec. | Patchy rain possible | 7° /4° | 0 mm | 2 | |
| 22 Dec. | Patchy rain possible | 7° /6° | 0.3 mm | 2 | |
| 23 Dec. | Patchy rain possible | 7° /3° | 0.9 mm | 2 | |
| 24 Dec. | Overcast | 9° /3° | 0 mm | 2 | |
| 25 Dec. | Patchy rain possible | 6° /3° | 0.4 mm | 2 | |
| 26 Dec. | Overcast | 5° /1° | 0 mm | 1 | |
| 27 Dec. | Partly cloudy | 8° /3° | 0 mm | 2 | |
| 28 Dec. |  Moderate or heavy rain shower | 9° /4° | 2.9 mm | 2 | |
| 29 Dec. |  Heavy rain at times | 7° /3° | 1 mm | 2 | |
| 30 Dec. | Moderate or heavy rain shower | 9° /3° | 10.3 mm | 2 | |
| 31 Dec. | Patchy rain possible | 8° /4° | 3 mm | 2 | |
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Important Notice
Our weather forecast for Belfast 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 Belfast forecast closer to your planned date for the most up-to-date weather information.
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Belfast in December - FAQ
What are the expected maximum and minimum temperatures in Belfast during December?
Prepare for cooler days with highs just around 10° and colder nights, dipping below 2°.
How much rainfall should be expected in Belfast during December?
Significant rainfall exceeding 288.6 mm is expected in Belfast during December, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Belfast in December 2025?
Belfast typically sees 0.3 cm of snowfall during December.
What are the typical wind conditions in Belfast during December?
The average wind speed in Belfast during December is 31 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Belfast
Explore the daily rainfall trends and prepare for Belfasts December weather 💧
Typically, Belfast has 21 rainy days in December with a total of 288.6 mm of rainfall.
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