Monmouth weather in December 2025

Expect daytime maximum temperatures of 45°F in Monmouth, Wales in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 3.9 inches of rainfall in the month.

  • 45°F maximum daytime temperature in December in Monmouth45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in December in Monmouth18
    18 days with some rainfall
  • 36°F minimum night-time temperature in December in Monmouth36
    36°F min night temperature
  • 8 hours of daylight per day in December in Monmouth8
    8 hours of daylight per day
  • No heat & humidity in December in Monmouth0
    No heat & humidity
  • 3.9 inches monthly rainfall in December in Monmouth3.9
    3.9 inches of monthly rainfall
  • No UV (maximum) index in December in Monmouth0
    No UV (Maximum) Index UV index

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The December weather guide for Wales (Monmouth) 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)

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More about Wales

How warm is it in Monmouth in December?

Daytime temperatures usually reach 46°F in Monmouth in December, falling to 37°F at night.

How sunny is it in Monmouth in December?

There are normally 2 hours of bright sunshine each day in Monmouth in December - that's 19% of daylight hours.

How warm is the sea around Monmouth in December?

The average sea temperature around Monmouth in December is 48°F.

Does it rain in Monmouth in December?

There are usually 19 days with some rain in Monmouth in December and the average monthly rainfall is 4.3 inches.

Monmouth December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:56 16:04
Tuesday, 16th December 2025 08:12 16:01
Wednesday, 31st December 2025 08:18 16:10

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