Portsmouth weather in December 2025

Q: How warm is it in Portsmouth in December?

Daytime temperatures usually reach 9°C in Portsmouth in December, falling to 4°C at night.

Q: How sunny is it in Portsmouth in December?

There are normally 2 hours of bright sunshine each day in Portsmouth in December - that's 24% of daylight hours.

Q: Is the sea cold around Portsmouth in December?

The average sea temperature around Portsmouth in December is 10°C.

Q: Does it rain in Portsmouth in December?

There are usually 16 days with some rain in Portsmouth in December and the average monthly rainfall is 78mm.

Expect daytime maximum temperatures of 48°F in Portsmouth, England in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 16 days with some rainfall and typically 3.1 inches of rainfall in the month.

48
48°F max day temperature
2
2 hours of sunshine per day
16
16 days with some rainfall
39
39°F min night temperature
8
8 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
1
1 (Low) UV index
50
50°F sea temperature

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The December 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 warm is it in Portsmouth in December?

Daytime temperatures usually reach 48°F in Portsmouth in December, falling to 39°F at night.

How sunny is it in Portsmouth in December?

There are normally 2 hours of bright sunshine each day in Portsmouth in December - that's 24% of daylight hours.

How warm is the sea around Portsmouth in December?

The average sea temperature around Portsmouth in December is 50°F.

Does it rain in Portsmouth in December?

There are usually 16 days with some rain in Portsmouth in December and the average monthly rainfall is 3.1 inches.

Portsmouth December sunrise & sunset times

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

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