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What is the climate like in 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 21°C.

Annually, about 853 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 21°C
Rain 853 mm

ModerateStarStarStar

There was frequent rain with occasional sunny breaks. The we... more

Freek

ModerateStarStarStar

August on Guernsey brought mixed emotions. Although the isla... more

Tamar

The climate of Guernsey
  • Average yearly temperature: 15°C
  • Highest temperature: 21°C in July
  • Lowest temperature: 10°C in January and February
  • Rainfall: 853 mm per year, averaging 71 mm by month
  • Driest months: 28 mm in July, 34 mm in April and 39 mm in June
  • Wettest months: 123 mm in October, 111 mm in December and 105 mm in January

Climate table Guernsey

The climate table for Guernsey shows the average temperatures, rainfall, and UV index by month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daytime temperature (°C) 10 10 11 13 16 19 21 20 19 16 13 11
Nighttime temperature (°C) 6 6 7 8 10 13 15 15 14 12 10 8
Rainfall (mm) 105 77 65 34 69 39 28 53 45 123 104 111
UV Index 2 3 5 7 8 8 8 7 6 3 2 1
Best month No No No No No Yes Yes Yes Yes No No No

Temperature by month in Guernsey

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

Temperature by month in Guernsey

Rainfall by month in Guernsey

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

Rainfall by month in Guernsey

UV index by month in Guernsey

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

UV index by 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 rainfall in Guernsey

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

Rainfall 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.

Write your own review
Weather Experience: Moderate StarStarStar

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 StarStarStar

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 StarStarStarStarStar

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 by 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, rainfall, wind, and UV index for each day of the month.