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Sonoma County

Province · California, 🇺🇸 United States
Population 488,863
Area 4,109 km²
Time zone America/Los_Angeles
Official website www.sonoma-county.org
Sonoma County

Sonoma County – Planning a Trip?

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Sonoma County — Map

Sonoma County — Map

Climate & when to visit

Best time to visit: May, June, July, August, September, October

Select a month

Typical weather in January

Fair
  • 14° (feels like 11°) · extremes 3°–18°
  • 8° at night
  • 12 rainy days
  • 13 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 2 · low

Typical weather in February

Fair
  • 14° (feels like 11°) · extremes 4°–19°
  • 8° at night
  • 11 rainy days
  • 15 sunny days
  • 7 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 3 · moderate

Typical weather in March

Fair
  • 15° (feels like 12°) · extremes 5°–21°
  • 8° at night
  • 11 rainy days
  • 17 sunny days
  • 8 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 5 · moderate

Typical weather in April

Good
  • 17° (feels like 14°) · extremes 5°–22°
  • 9° at night
  • 7 rainy days
  • 20 sunny days
  • 10 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 6 · high

Typical weather in May

Great
  • 19° (feels like 16°) · extremes 8°–25°
  • 10° at night
  • 4 rainy days
  • 24 sunny days
  • 12 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 8 · very high

Typical weather in June

Great
  • 23° (feels like 20°) · extremes 10°–28°
  • 12° at night
  • 1 rainy day
  • 27 sunny days
  • 13 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 9 · very high

Typical weather in July

Great
  • 25° (feels like 22°) · extremes 11°–29°
  • 13° at night
  • 0 rainy days
  • 30 sunny days
  • 13 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 10 · very high

Typical weather in August

Great
  • 25° (feels like 23°) · extremes 12°–30°
  • 14° at night
  • 0 rainy days
  • 28 sunny days
  • 12 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 8 · very high

Typical weather in September

Great
  • 25° (feels like 23°) · extremes 11°–31°
  • 14° at night
  • 1 rainy day
  • 26 sunny days
  • 11 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 7 · high

Typical weather in October

Great
  • 22° (feels like 20°) · extremes 9°–28°
  • 12° at night
  • 4 rainy days
  • 23 sunny days
  • 8 hours of sunshine per day
  • Dry air
  • Calm winds
  • UV index 4 · moderate

Typical weather in November

Good
  • 17° (feels like 15°) · extremes 6°–23°
  • 10° at night
  • 9 rainy days
  • 17 sunny days
  • 6 hours of sunshine per day
  • Dry air
  • Calm winds
  • UV index 3 · moderate

Typical weather in December

Fair
  • 14° (feels like 11°) · extremes 4°–18°
  • 8° at night
  • 13 rainy days
  • 12 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Light breeze
  • UV index 1 · low

Climate data: NASA POWER (MERRA-2) · 1996–2025

Practical information

Currency
US Dollar USD $ · Card payments · Widely accepted
Emergency numbers
911 Police · Ambulance · Fire brigade
Electricity
Type A / Type B
120 V · 60 Hz
Languages
English
Tap water
Safe to drink
Driving side
Right
Calling code
+1
Learn more

Tours & Activities

Riverside Hotel
Taxi · 8 min
Sonoma County
2h
Walk · 6 min
Corner Café
45 min
Walk · 18 min
Riverside Hotel

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