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Average climate of Guernsey

The climate of Guernsey has an average yearly temperature of 15°C. Throughout the year, the average monthly temperature can drop to 10°C and rise to 20°C.

Annually, about 798 mm of rain falls. This gives a good overview of how much rain to expect in Guernsey.

The best time to visit Guernsey is June until September. During this period, you will experience pleasant temperatures and not too much rain, making it ideal to visit Guernsey.

Temperature 10 to 20°C
Rain 798 mm
The climate of Guernsey
  • Average yearly temperature: 15°C
  • Highest temperature: 20°C in July and August
  • Lowest temperature: 10°C in January and February
  • Precipitation: 798 mm per year, averaging 67 mm per month
  • Driest months: 29 mm in July, 31 mm in April and 38 mm in June
  • Wettest months: 112 mm in October, 104 mm in December and 100 mm in January

Climate table Guernsey

The climate table for Guernsey shows the average temperatures, precipitation, and UV index per month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daytime temperature (°C) 10 10 11 13 15 18 20 20 19 16 13 11
Nighttime temperature (°C) 7 6 7 8 10 13 15 15 15 12 10 8
Precipitation (mm) 100 71 61 31 59 38 29 50 44 112 99 104
UV Index 2 3 5 6 7 7 7 6 5 3 2 1
Best month No No No No No Yes Yes Yes Yes No No No

Temperature per month in Guernsey

This graph shows the average high temperatures in degrees Celsius for each month in Guernsey

Temperature per month in Guernsey

Precipitation per month in Guernsey

This graph shows the average monthly precipitation in millimeters in Guernsey.

Precipitation per month in Guernsey

UV index per month in Guernsey

This graph shows the average UV index per month in Guernsey.

UV index per month in Guernsey

Yearly temperature in Guernsey

This graph shows the average yearly temperature in Guernsey, measured in degrees Celsius.

Yearly temperature in Guernsey

Yearly total precipitation in Guernsey

This graph shows the average yearly precipitation in millimeters in Guernsey.

Precipitation per year in Guernsey

Weather experiences in Guernsey

The weather in Guernsey is rated an average of 3,7 out of 5 stars by 3 visitors.

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Weather Experience: Moderate

There was frequent rain with occasional sunny breaks. The weather is changeable, but it gives the island its charm.— This text has been automatically translated into English

Weather Experience: Moderate

August on Guernsey brought mixed emotions. Although the island was bathed in sunshine and warm temperatures, there were also unexpected showers and cool evenings. Compliment the beauty of nature despite the changeable weather.— This text has been automatically translated into English

Weather Experience: Excellent

Blessed climate, average 23 degrees, sunshine every day , small breeze. They are blissful islands to relax and enjoy nature— This text has been automatically translated into English

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Average weather in Guernsey per month

Click on a month below to see in detail how the weather typically is in Guernsey and what to expect. Based on the historical weather data of Guernsey, you can view the average temperature, precipitation, wind, and UV index for each day of the month.