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Silicon Valley

Region · California, 🇺🇸 United States
Time zone America/Los_Angeles
Silicon Valley

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Silicon Valley — Map

Silicon Valley — Map

Climate & when to visit

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

Select a month

Typical weather in January

Good
  • 15° (feels like 13°) · extremes 4°–20°
  • 8° at night
  • 9 rainy days
  • 13 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 2 · low

Typical weather in February

Good
  • 15° (feels like 13°) · extremes 5°–22°
  • 8° at night
  • 9 rainy days
  • 14 sunny days
  • 7 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 3 · moderate

Typical weather in March

Good
  • 17° (feels like 15°) · extremes 6°–23°
  • 9° at night
  • 10 rainy days
  • 16 sunny days
  • 8 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 5 · moderate

Typical weather in April

Great
  • 18° (feels like 16°) · extremes 7°–25°
  • 10° at night
  • 6 rainy days
  • 18 sunny days
  • 9 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 7 · high

Typical weather in May

Great
  • 20° (feels like 19°) · extremes 9°–28°
  • 12° at night
  • 3 rainy days
  • 17 sunny days
  • 10 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 7 · high

Typical weather in June

Great
  • 23° (feels like 22°) · extremes 11°–30°
  • 13° at night
  • 1 rainy day
  • 18 sunny days
  • 11 hours of sunshine per day
  • Dry air
  • Calm winds
  • 12°C · too cold to swim
  • UV index 9 · very high

Typical weather in July

Great
  • 25° · extremes 13°–31°
  • 15° at night
  • 0 rainy days
  • 11 sunny days
  • 10 hours of sunshine per day
  • Comfortable humidity
  • Calm winds
  • 13°C · too cold to swim
  • UV index 9 · very high

Typical weather in August

Great
  • 26° · extremes 13°–31°
  • 15° at night
  • 0 rainy days
  • 12 sunny days
  • 9 hours of sunshine per day
  • Comfortable humidity
  • Calm winds
  • 14°C · too cold to swim
  • UV index 8 · very high

Typical weather in September

Great
  • 26° · extremes 13°–33°
  • 15° at night
  • 1 rainy day
  • 15 sunny days
  • 8 hours of sunshine per day
  • Comfortable humidity
  • Calm winds
  • 15°C · too cold to swim
  • UV index 6 · high

Typical weather in October

Great
  • 23° (feels like 22°) · extremes 10°–31°
  • 14° at night
  • 3 rainy days
  • 17 sunny days
  • 8 hours of sunshine per day
  • Dry air
  • Calm winds
  • 14°C · too cold to swim
  • UV index 4 · moderate

Typical weather in November

Great
  • 18° (feels like 17°) · extremes 7°–24°
  • 11° at night
  • 7 rainy days
  • 16 sunny days
  • 6 hours of sunshine per day
  • Dry air
  • Calm winds
  • 13°C · too cold to swim
  • UV index 3 · moderate

Typical weather in December

Good
  • 15° (feels like 13°) · extremes 5°–19°
  • 8° at night
  • 10 rainy days
  • 12 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Calm winds
  • 13°C · too cold to swim
  • UV index 2 · low

Climate data: NASA POWER + Copernicus ERA5-Land and ERA5 · 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

Fisherman's Wharf
Drive
Alcatraz Island
Drive
San Francisco Cable Cars

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