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Snowdonia National Park

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Snowdonia National Park Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Snowdonia National Park year round climate

  • Spring (March–May): Average 41–52°F, cool climate with less rainfall, suitable for hiking and trekking. Common activities: Hiking, trekking, enjoying mountain views. Recommended clothing: Warm jacket, waterproof jacket, comfortable hiking boots.
  • Summer (June–August): Average 51–56°F, mild climate with less rainfall and more sunny days. Common activities: Camping, rambling, boating, rock climbing. Recommended clothing: Lightweight and breathable clothing, waterproof jacket, sunscreen.
  • Autumn (September–November): Average 49–52°F, cool climate with less rainfall, crisp autumn weather. Common activities: Viewing autumn leaves, hiking, photography. Recommended clothing: Warm jacket, comfortable walking shoes.
  • Winter (December–February): Average 38–42°F, cold and humid climate, with potential snowfall. Common activities: Skiing, enjoying snow scenes. Recommended clothing: Thick warm clothing, waterproof jacket, warm hat, gloves and scarf.

Snowdonia National Park climatological average

Annual average temperature: approx. 47.5°F / Annual rainfall: approx. 72 mm / Summer humidity: 60%–70% / Rainiest month: February

Snowdonia National Park monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
38.1°F
8.3
February
41.7°F
9.1
March
41.5°F
7.6
April
44.6°F
7.5
May
52.5°F
4.4
June
52°F
3.2
July
55.2°F
5.1
August
56.3°F
6.6
September
52.7°F
4.2
October
49.1°F
4.7
November
43.7°F
4.7
December
42.8°F
7.2

Snowdonia National Park weather for the next seven days

3/19
Thursday
Sunny
58.5°F/42.6°F
3/20
Friday
Sunny
55.9°F/40.2°F
3/21
Saturday
Sunny
56.8°F/40.7°F
3/22
Sunday
Sunny
53.9°F/35.8°F
3/23
Monday
Overcast
46.7°F/32.5°F
3/24
Tuesday
Patchy rain nearby
49°F/38.3°F
3/25
Wednesday
Patchy rain nearby
40.6°F/34.6°F