City of Belfast (Belfast)
December
Weather in City of Belfast for December 2025
Your guide to City of Belfast weather in December - trends and predictions
In general, the average temperature in City of Belfast 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.
City of Belfast experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 147 mm.
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Temperatures
Rain 🌧️
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7
Dry days
24
Rainy days
0
Snow days
8°/4°
Temperatures
32 km/h
Avg max wind
85 %
Avg humidity
City of Belfast in December average weather
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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 City of Belfast
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 City of 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 City of Belfast forecast closer to your planned date for the most up-to-date weather information.
City of Belfast in December - FAQ
What are the expected maximum and minimum temperatures in City of Belfast during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 4°.
How much rainfall should be expected in City of Belfast during December?
Significant rainfall exceeding 147 mm is expected in City of Belfast during December, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
Will it snow in City of Belfast in December 2025?
City of Belfast typically sees 0 cm of snowfall during December.
What are the typical wind conditions in City of Belfast during December?
The average wind speed in City of Belfast during December is 32 km/h, suggesting breezy to windy conditions, depending on your activities.
City of Belfast snow forecast December 2025
Track daily snowfall levels and discover City of Belfast’s snowy potential this December ❄️
December rainfall patterns in City of Belfast
Explore the daily rainfall trends and prepare for City of Belfasts December weather 💧
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