Ulster (Donegal)
December
Weather in Ulster for December 2025
Your guide to Ulster weather in December - trends and predictions
Snowfall in Ulster during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Ulster at the beginning of December is 7.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 8.9 °C by the end of December.
Ulster experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 178.3 mm.
Snow Forecast ❄️
Temperatures
Rain 🌧️
4
Dry days
26
Rainy days
1
Snow days
8°/4°
Temperatures
27 km/h
Avg max wind
85 %
Avg humidity
Ulster Weather December
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  8° | 2  5° | 3  5° | 4  7° | 5 8° | 6  9° | 7 10° |
| 8  9° | 9 7° | 10 7° | 11 6° | 12  5° | 13 6° | 14 9° |
| 15 11° | 16 11° | 17 12° | 18 12° | 19 7° | 20 9° | 21 11° |
| 22 8° | 23 11° | 24 12° | 25 10° | 26 8° | 27 11° | 28 8° |
| 29 8° | 30  9° | 31  8° |
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Temperatures trend during December in Ulster
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. | Light freezing rain | 8° /3° | 2 mm | 0 cm | |
| 2 Dec. | Mist | 5° /-1° | 0.6 mm | 0 cm | |
| 3 Dec. | Overcast | 5° /0° | 3 mm | 0 cm | |
| 4 Dec. | Light snow | 7° /1° | 1.5 mm | 0 cm | |
| 5 Dec. | Overcast | 8° /3° | 6.6 mm | 0 cm | |
| 6 Dec. | Moderate rain | 9° /1° | 21.9 mm | 0 cm | |
| 7 Dec. | Moderate rain | 10° /5° | 11.3 mm | 0 cm | |
| 8 Dec. | Light rain shower | 9° /4° | 8.2 mm | 0 cm | |
| 9 Dec. | Light rain shower | 7° /3° | 4.4 mm | 0 cm | |
| 10 Dec. | Light rain shower | 7° /2° | 5.3 mm | 0 cm | |
| 11 Dec. | Moderate rain | 6° /2° | 5.4 mm | 0 cm | |
| 12 Dec. | Light drizzle | 5° /2° | 3.1 mm | 0 cm | |
| 13 Dec. | Patchy rain possible | 6° /2° | 0.6 mm | 0 cm | |
| 14 Dec. | Patchy rain possible | 9° /4° | 2.5 mm | 0 cm | |
| 15 Dec. | Patchy rain possible | 11° /7° | 0.4 mm | 0 cm | |
| 16 Dec. | Patchy rain possible | 11° /8° | 0.5 mm | 0 cm | |
| 17 Dec. | Light rain | 12° /8° | 9 mm | 0 cm | |
| 18 Dec. | Light drizzle | 12° /5° | 5.4 mm | 0 cm | |
| 19 Dec. | Patchy rain possible | 7° /4° | 3.1 mm | 0 cm | |
| 20 Dec. | Light rain shower | 9° /6° | 5.9 mm | 0 cm | |
| 21 Dec. | Light rain shower | 11° /6° | 9.7 mm | 0 cm | |
| 22 Dec. | Patchy rain possible | 8° /6° | 5.4 mm | 0.2 cm | |
| 23 Dec. | Moderate rain | 11° /7° | 12.7 mm | 0 cm | |
| 24 Dec. | Light rain shower | 12° /9° | 2.5 mm | 0 cm | |
| 25 Dec. | Light rain shower | 10° /6° | 2.5 mm | 0 cm | |
| 26 Dec. | Patchy rain possible | 8° /5° | 2.4 mm | 0 cm | |
| 27 Dec. | Light rain shower | 11° /6° | 12.3 mm | 0 cm | |
| 28 Dec. | Light rain shower | 8° /5° | 7.5 mm | 0 cm | |
| 29 Dec. | Light rain shower | 8° /3° | 2.7 mm | 0 cm | |
| 30 Dec. | Moderate or heavy sleet | 9° /5° | 8.8 mm | 0 cm | |
| 31 Dec. | Moderate or heavy rain with thunder | 8° /4° | 10.9 mm | 0 cm | |
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Important Notice
Our weather forecast for Ulster 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 Ulster forecast closer to your planned date for the most up-to-date weather information.
Ulster in December - FAQ
What are the expected maximum and minimum temperatures in Ulster during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 4°.
How much rainfall should be expected in Ulster during December?
Significant rainfall exceeding 178.3 mm is expected in Ulster during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Ulster in December 2025?
Ulster typically sees 0.22 cm of snowfall during December.
What are the typical wind conditions in Ulster during December?
The average wind speed in Ulster during December is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
Ulster snow forecast December 2025
Track daily snowfall levels and discover Ulster’s snowy potential this December ❄️
December rainfall patterns in Ulster
Explore the daily rainfall trends and prepare for Ulsters December weather 💧
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