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Marin County

Travel Info

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Marin County Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Marin County year round climate

  • Spring (March–May): Average 52–60°F, mild climate, gradually decreasing rainfall, and increasingly sunny days. Common activities: Hiking, cycling, flower viewing. Recommended clothing: Light jacket, long-sleeved shirt, comfortable casual shoes.
  • Summer (June–August): Average 64–67°F, dry and less rain, abundant sunshine, the best season for outdoor activities. Common activities: Beach activities, camping, hiking. Recommended clothing: Short-sleeved shirts, shorts, sandals, sunscreen is a must.
  • Autumn (September–November): Average 61–51°F, gradually decreasing temperature, rainfall begins to increase. Common activities: Autumn scenery viewing, winery visits. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Winter (December–February): Average 49–50°F, lower temperatures, more rainfall, occasional drizzle. Common activities: Indoor activities, museum visits. Recommended clothing: Warm jacket, sweater, waterproof jacket, and warm shoes.

Marin County climatological average

Annual average temperature: approx. 58.1°F / Annual rainfall: approx. 738 mm / Summer humidity: 60%–70% / Rainiest month: December

Marin County monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
50.2°F
175.1
February
49.6°F
101.7
March
52.5°F
105.3
April
56.3°F
27.8
May
60.3°F
20.2
June
64.8°F
2.8
July
67.1°F
2.5
August
67.6°F
0.5
September
65.5°F
21.9
October
61.5°F
7.3
November
51.6°F
91.8
December
49.5°F
181.2

Marin County weather for the next seven days

12/14
Sunday
Fog
61.5°F/40.5°F
12/15
Monday
Mist
60.3°F/40.5°F
12/16
Tuesday
Patchy rain nearby
59.8°F/48.6°F
12/17
Wednesday
Patchy rain nearby
60.1°F/44.8°F
12/18
Thursday
Partly Cloudy
55.1°F/42.2°F
12/19
Friday
Patchy rain nearby
58.2°F/48.1°F
12/20
Saturday
Partly Cloudy
53.6°F/44.5°F

Marin County Frequently Asked Questions and Useful Information for Travel

Best time to visit Marin County?

The best times to visit Marin County are spring and fall, when the weather is pleasant and perfect for outdoor activities.

A must-visit attraction in Marin County?

Must-visit attractions in Marin County include the St. Johns River, the Duvern County Museum, and several beaches.