Portsmouth in January
3.9out of 10
Not the best time
Cold: highs around 1°C. Frequent rain: about 10 rainy days.
1°CAvg high
-5°CAvg low
10Rainy days (91 mm)
9:09 hDaylight
07:18Sunrise · 16:27 Sunset
Why this score
- Cold: highs around 1°C
- Frequent rain: about 10 rainy days
- Nights fall to about -5°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?
Rainfall in January is fairly consistent from year to year (2.8 days). 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 January?
Daytime highs average 1°C and nights about -5°C.
When is the best time to visit Portsmouth?
The best months are August, July, September, June.