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Temperature in Cornwall in December

Cornwall is a region in the United Kingdom. December in has maximum daytime temperatures ranging from low in Gunnislake with 10°C to moderate temperatures in St Just with 12°C. Nighttime temperatures generally drop to 9°C in St Just and 4°C in Gunnislake. December is a winter month.

What is the temperature of the different cities in Cornwall in December?

Explore the map below to discover average December temperatures at the top destinations in Cornwall. For a deeper dive, simply click on any destination dot.

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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in December in Cornwall?
  • St Just tops the warmest city list in our database with average maximum daytime temperatures around 12°C and a minimum nighttime temperature of around 9°C.

  • What is the coldest city in December in Cornwall?
  • When looking through our records, we find that Gunnislake stands out as the coolest city in Cornwall for the month of December. Daytime highs average 10°C and it cools down to about 4°C at night.

  • How much sun does Cornwall get in December?
  • The city Newquay usually sees around 65 hours of sunlight, indicating fewer sunny days.

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