The climate in San Jose during December can be summarized as hot, humid and wet.
December is in the winter in San Jose and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 20°C (68°F) is normal.
|Daytime temperature||27.3°C 81.1°F|
|Nightly temperature||20.2°C 68.3°F|
|Average temperature||23.7°C 74.7°F|
|Daily sunshine||5.2 hrs|
|Avg rainfall||173 mm 6.8 ins|
|Rainy days||15 days|
|Sea temperature||26.9°C 80.4°F|
|Windspeed||10.8kph 7 mph|
On average December is the 4th wettest month of the year in San Jose with around 173mm 6.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.2 hours of sunshine per day.
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 December 2020.
|Hottest month:||May||34.4°C 93.9°F|
|Driest month:||February||43mm 1.7ins|
|Coldest month:||January||27.1°C 80.8°F|
|Wettest month:||November||384mm 15.1ins|