Portsmouth weather in January 2025

Expect 45°F daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Portsmouth in January. Check more long-term weather averages for Portsmouth in January before you book your next holiday to England in 2025/2026.

45
45°F max day temperature
2
2 hours of sunshine per day
17
17 days with some rainfall
37
37°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
1
1 (Low) UV index
46
46°F sea temperature

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The January weather guide for England (Portsmouth) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about England

How cold is it in Portsmouth in January?

Daytime temperatures usually reach 45°F in Portsmouth in January, falling to 37°F at night.

How sunny is it in Portsmouth in January?

There are normally 2 hours of bright sunshine each day in Portsmouth in January - that's 23% of daylight hours.

How warm is the sea around Portsmouth in January?

The average sea temperature around Portsmouth in January is 46°F.

Does it rain in Portsmouth in January?

There are usually 17 days with some rain in Portsmouth in January and the average monthly rainfall is 3.1 inches.

Portsmouth January sunrise & sunset times

Browse the sunrise and sunset times for Portsmouth in January 2025. Select a month to view Portsmouth sunrise and sunset times for the next 12 months.

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