Portsmouth in December
4.3out of 10
Not the best time
Cold: highs around 4°C. Frequent rain: about 11 rainy days.
4°CAvg high
-2°CAvg low
11Rainy days (117 mm)
8:50 hDaylight
07:14Sunrise · 16:04 Sunset
Why this score
- Cold: highs around 4°C
- Frequent rain: about 11 rainy days
- Nights fall to about -2°C
What to wear and pack
- Winter coat, hat and scarf
- Rain jacket or compact umbrella
- Gloves for freezing mornings
How reliable is the forecast?
Rain in December varies a lot between years (±3.1 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 1°C | -5°C | 91 mm | 10 | – | – | 3.9 |
| February | 2°C | -5°C | 85 mm | 9 | – | – | 4.2 |
| March | 5°C | -1°C | 113 mm | 11 | – | – | 4.6 |
| April | 11°C | 4°C | 108 mm | 11 | – | – | 5.7 |
| May | 16°C | 10°C | 82 mm | 11 | – | – | 6.7 |
| June | 21°C | 15°C | 91 mm | 11 | – | – | 7.5 |
| July | 24°C | 18°C | 78 mm | 10 | – | – | 7.7 |
| August | 24°C | 18°C | 83 mm | 9 | – | – | 7.9 |
| September | 20°C | 14°C | 87 mm | 9 | – | – | 7.7 |
| October | 15°C | 9°C | 111 mm | 10 | – | – | 6.5 |
| November | 9°C | 3°C | 96 mm | 10 | – | – | 5.7 |
| December | 4°C | -2°C | 117 mm | 11 | – | – | 4.3 |
Frequently asked questions
How hot is Portsmouth in December?
Daytime highs average 4°C and nights about -2°C.
When is the best time to visit Portsmouth?
The best months are August, July, September, June.