Mountain View Weather in December

What's the weather like in Mountain View (California) in December 2025?

The climate in Mountain View during December can be summarized as cool and a little damp.

December is in the winter in Mountain View and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 4°C (40°F) is normal.

Mountain View weather averages (imperial / metric)
Daytime temperature 13.2°C 55.7°F
Nightly temperature 4.3°C 39.7°F
Average temperature 8.7°C 47.7°F
Daily sunshine 5.5 hrs
Avg rainfall 90 mm 3.5 ins
Rainy days 9 days
Sea temperature 12.6°C 54.6°F
Humidity 81%
Windspeed 11.9kph 7 mph

On average December is the 2nd wettest month of the year in Mountain View with around 90mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.5 hours of sunshine per day.

December temperatures in Mountain View

Mountain View average temperature in December

December rainfall

Mountain View average rain in December

December hourly sunshine

Mountain View average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mountain View in December 2025.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Mountain View weather stats

Mountain View weather statistics
Hottest month: July 28°C 82.4°F
Driest month: July 1mm 0ins
Sunniest month: July 12.7hrs
Coldest month: January 12.7°C 54.9°F
Wettest month: January 117mm 4.6ins
Map showing location of Mountain View (38.00881, -122.11746) Mountain View map pin © Google

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