Portsmouth
December
Weather in Portsmouth for December 2025
Your guide to Portsmouth weather in December - trends and predictions
In general, the average temperature in Portsmouth at the beginning of December is 10 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 10.9 °C by the end of December.
Portsmouth experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 137 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
8
Dry days
23
Rainy days
0
Snow days
10°/7°
Temperatures
40 km/h
Avg max wind
84 %
Avg humidity
Portsmouth in December average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  9° | 2  9° | 3  9° | 4 11° | 5 10° | 6 10° | 7  12° |
| 8 9° | 9 10° | 10  10° | 11  9° | 12 10° | 13 9° | 14 8° |
| 15 10° | 16 11° | 17  11° | 18 12° | 19 12° | 20 10° | 21 12° |
| 22  11° | 23 11° | 24 11° | 25 11° | 26 10° | 27 11° | 28  11° |
| 29 10° | 30 11° | 31 12° |
You can click on date
Access Portsmouth weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in Portsmouth
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. | Light snow | 9° /6° | 3.3 mm | 3 | |
| 2 Dec. | Sunny | 9° /4° | 1 mm | 3 | |
| 3 Dec. | Light rain shower | 9° /5° | 13 mm | 3 | |
| 4 Dec. | Light rain shower | 11° /7° | 9.5 mm | 3 | |
| 5 Dec. | Light rain shower | 10° /7° | 6.6 mm | 3 | |
| 6 Dec. | Patchy rain possible | 10° /4° | 0.3 mm | 3 | |
| 7 Dec. | Moderate rain | 12° /6° | 11.3 mm | 3 | |
| 8 Dec. | Light rain shower | 9° /7° | 3.4 mm | 3 | |
| 9 Dec. | Light rain shower | 10° /8° | 7.9 mm | 3 | |
| 10 Dec. | Light drizzle | 10° /7° | 3.1 mm | 3 | |
| 11 Dec. | Partly cloudy | 9° /7° | 0.2 mm | 3 | |
| 12 Dec. | Light rain shower | 10° /7° | 8.1 mm | 3 | |
| 13 Dec. | Light drizzle | 9° /6° | 2.5 mm | 2 | |
| 14 Dec. | Light drizzle | 8° /4° | 0.5 mm | 2 | |
| 15 Dec. | Sunny | 10° /5° | 0.3 mm | 3 | |
| 16 Dec. | Patchy rain possible | 11° /8° | 0.2 mm | 3 | |
| 17 Dec. | Overcast | 11° /9° | 0.4 mm | 3 | |
| 18 Dec. | Light drizzle | 12° /10° | 5 mm | 3 | |
| 19 Dec. | Light rain | 12° /5° | 2.2 mm | 3 | |
| 20 Dec. | Patchy rain possible | 10° /5° | 2.3 mm | 3 | |
| 21 Dec. | Light drizzle | 12° /8° | 2 mm | 3 | |
| 22 Dec. | Moderate or heavy rain shower | 11° /7° | 3.3 mm | 3 | |
| 23 Dec. | Patchy rain possible | 11° /7° | 3.7 mm | 3 | |
| 24 Dec. | Patchy rain possible | 11° /9° | 1.4 mm | 3 | |
| 25 Dec. | Moderate rain at times | 11° /8° | 2.1 mm | 3 | |
| 26 Dec. | Sunny | 10° /6° | 1.2 mm | 3 | |
| 27 Dec. | Patchy rain possible | 11° /7° | 1.7 mm | 3 | |
| 28 Dec. | Heavy rain at times | 11° /8° | 3.7 mm | 3 | |
| 29 Dec. | Partly cloudy | 10° /7° | 0.5 mm | 3 | |
| 30 Dec. | Patchy rain possible | 11° /7° | 6.1 mm | 3 | |
| 31 Dec. | Moderate or heavy rain shower | 12° /8° | 12.4 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Portsmouth 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 Portsmouth forecast closer to your planned date for the most up-to-date weather information.
Portsmouth in December - FAQ
What are the expected maximum and minimum temperatures in Portsmouth during December?
During December, expect a variety of temperatures with highs around 10° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portsmouth during December?
Significant rainfall exceeding 137 mm is expected in Portsmouth during December, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Portsmouth in December 2025?
Portsmouth typically sees 0.015 cm of snowfall during December.
What are the typical wind conditions in Portsmouth during December?
The average wind speed in Portsmouth during December is 40 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Portsmouth
Explore the daily rainfall trends and prepare for Portsmouths December weather 💧
Quick links
You are here
Where is Portsmouth?Get accurate weather forecasts for Portsmouth, located at latitude 50.799 and longitude -1.091. Stay updated with localized weather information tailored for Portsmouth.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.