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Guerneville

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Guerneville Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Guerneville year round climate

  • Spring (March–May): Average 9.5–16.2°C, mild and comfortable climate with minimal rainfall. Common activities: Hiking, biking, flower viewing. Suggested clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 21.2–23.9°C, dry and warm climate with abundant sunshine. Common activities: Swimming, camping, picnicking, water activities. Suggested clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 10.9–20.7°C, cool and comfortable climate, with more rainfall in November. Common activities: Leaf peeping, winery tours, hiking. Suggested clothing: Light jacket or sweater, comfortable shoes.
  • Winter (December–February): Average 8.8–10.5°C, mild climate with occasional rainfall. Common activities: Hot spring bathing, indoor activities, trying local cuisine. Suggested clothing: Warm jacket, sweater, scarf, hat.

Guerneville climatological average

Annual average temperature: approx. 15°C / Annual rainfall: approx. 60 mm / Summer humidity: 40%–60% / Rainiest month: November

Guerneville monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
9.5°C
9.1
February
8.8°C
9.2
March
9.5°C
5.7
April
12.4°C
1.5
May
16.2°C
0.9
June
21.2°C
0
July
23.9°C
0
August
21.4°C
0.1
September
20.7°C
0
October
19°C
0.9
November
10.9°C
18.9
December
10.5°C
14.5

Guerneville weather for the next seven days

4/30
Thursday
Sunny
25°C/8.2°C
5/1
Friday
Overcast
23.4°C/10.2°C
5/2
Saturday
Overcast
20.6°C/7.1°C
5/3
Sunday
Cloudy
17.5°C/7°C
5/4
Monday
Overcast
16.6°C/7.2°C
5/5
Tuesday
Partly Cloudy
18.7°C/8.1°C
5/6
Wednesday
Partly Cloudy
20.6°C/7.1°C

Guerneville Frequently Asked Questions and Useful Information for Travel

What is the best time to visit?

The best time to visit is in spring and autumn, when the local weather and temperatures are moderate, suitable for all types of activities.

What are the must-see attractions?

Must-see attractions include Wheeling Water Adventure Park, Frankie's Theme Park, HL Henry's Submarine Museum, Tanger Outlet Shopping Center and numerous golf clubs.