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Guernsey

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Guernsey Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Guernsey year round climate

  • Spring (March–May): Average 8.9–12.8°C, mild climate with occasional showers but generally sunny. Popular activities: Coastal walks, exploring island attractions. Suggested clothing: Light jacket, comfortable trousers or skirt, and warm underlayers.
  • Summer (June–August): Average 15.4–17.7°C, warm and pleasant climate, sunny with occasional showers. Popular activities: Beach relaxation, water sports, outdoor picnics. Suggested clothing: Short-sleeved shirts, shorts, light sandals, and a light jacket for cooler evenings.
  • Autumn (September–November): Average 11.1–16.4°C, gradually cooling climate with increasing rainfall, especially in November. Popular activities: Enjoying autumn scenery, museum visits. Suggested clothing: Long-sleeved shirts, light jacket, comfortable trousers, and a waterproof jacket.
  • Winter (December–February): Average 7.5–8.9°C, cold and damp climate with frequent rain. Popular activities: Indoor activities, trying local cuisine. Suggested clothing: Warm jacket, sweater, trousers, waterproof jacket and shoes.

Guernsey climatological average

Annual average temperature: approx. 12.4°C / Annual rainfall: approx. 1029 mm / Summer humidity: 65%–75% / Rainiest month: November

Guernsey monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
7.5°C
115.5
February
8.6°C
68.2
March
8.9°C
99.2
April
9.9°C
58.8
May
12.8°C
32.2
June
15.4°C
35
July
17.2°C
40.5
August
17.7°C
58.8
September
16.4°C
92.2
October
14.5°C
108.4
November
11.1°C
171.2
December
8.9°C
149

Guernsey weather for the next seven days

7/26
Sunday
Patchy rain nearby
18.2°C/17.5°C
7/27
Monday
Sunny
19°C/17.4°C
7/28
Tuesday
Sunny
21.2°C/18.4°C
7/29
Wednesday
Sunny
21.8°C/19.8°C
7/30
Thursday
Sunny
19.7°C/18.2°C
7/31
Friday
Sunny
19.9°C/17.7°C
8/1
Saturday
Sunny
19.5°C/18.4°C