Portsmouth weather in January 2025

Expect 7°C 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.

  • 7°C maximum daytime temperature in January in Portsmouth7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 17 days with some rainfall in January in Portsmouth17
    17 days with some rainfall
  • 3°C minimum night-time temperature in January in Portsmouth3
    3°C min night temperature
  • 9 hours of daylight per day in January in Portsmouth9
    9 hours of daylight per day
  • No heat & humidity in January in Portsmouth0
    No heat & humidity
  • 79 mm monthly rainfall in January in Portsmouth79
    79 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Portsmouth1
    1 (Low) UV index
  • 8°C sea temperature in January in Portsmouth8
    8°C 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 / mm)  |  Imperial (°F / inches)

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More about England

How cold is it in Portsmouth in January?

Daytime temperatures usually reach 7°C in Portsmouth in January, falling to 3°C 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.

Is the sea cold around Portsmouth in January?

The average sea temperature around Portsmouth in January is 8°C.

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 79mm.

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.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 08:07 16:10
Thursday, 16th January 2025 07:59 16:30
Friday, 31st January 2025 07:42 16:55

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