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
Yellow Rain Warning - See hour by hour.
So far, December 2025 in City of Belfast is slightly warmer than the historical average by 0.7 °C.
The forecast for the next days in City of Belfast predicts temperatures to be around 9 °C, close to the historical average.
In general, the average temperature in City of Belfast at the beginning of December is 8.1 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 8.3 °C by the end of December.
City of Belfast experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 288.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
10
Dry days
21
Rainy days
0
Snow days
10°/2°
Temperatures
31 km/h
Avg max wind
86 %
Avg humidity
City of Belfast Weather December
Move between months or click on a day
Temperatures trend during December in City of Belfast
See the weather trend as well as the moving average line
December weather in City of Belfast day by day
Click on a date for more information
| 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 | 9° /4° | 2.1 mm | 0 | |
| 14 Dec. | Moderate rain | 11° /10° | 11.1 mm | 0 | |
| 15 Dec. | Patchy rain possible | 8° /4° | 0.5 mm | 0.1 | |
| 16 Dec. |  Sunny | 5° /2° | 0 mm | 0.1 | |
| 17 Dec. | Moderate rain | 10° /5° | 6 mm | 0 | |
| 18 Dec. | Patchy rain possible | 10° /5° | 2.3 mm | 2 | |
| 19 Dec. | Patchy rain possible | 7° /6° | 0.3 mm | 2 | |
| 20 Dec. | Moderate rain | 10° /7° | 7.3 mm | 2 | |
| 21 Dec. | Patchy rain possible | 13° /7° | 4.6 mm | 2 | |
| 22 Dec. | Patchy rain possible | 12° /7° | 3.2 mm | 2 | |
| 23 Dec. | Overcast | 6° /3° | 0 mm | 2 | |
| 24 Dec. | Patchy rain possible | 7° /1° | 0.5 mm | 1 | |
| 25 Dec. | Patchy rain possible | 9° /3° | 2.8 mm | 2 | |
| 26 Dec. | Patchy rain possible | 6° /1° | 0.2 mm | 1 | |
| 27 Dec. |  Moderate or heavy rain shower | 10° /4° | 13.6 mm | 3 | |
| 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 | |
| Next | |||||
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.
Change Month
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 10° and colder nights, dipping below 2°.
How much rainfall should be expected in City of Belfast during December?
Significant rainfall exceeding 288.6 mm is expected in City of Belfast during December, occurring over more than 21 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 0.3 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 31 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in City of Belfast
Explore the daily rainfall trends and prepare for City of Belfasts December weather 💧
Typically, City of Belfast has 21 rainy days in December with a total of 288.6 mm of rainfall.
Top locations in City of Belfast
Select a location for an accurate weather forecast
More Locations Quick links
More City of Belfast weather pages
You are here
Where is City of Belfast?Get accurate weather forecasts for City of Belfast, located at latitude 54.597 and longitude -5.925. Stay updated with localized weather information tailored for City of Belfast.
Found a mistake?
We appreciate your attention to details. Tell us here.