Cupertino Weather in December

Cupertino in December averages 15°C (59°F) during the day and 5°C (41°F) at night. This is the wettest month of the year, and part of the winter season.

Rainfall in Cupertino in December

With the most rainfall occurring this month, it's practical to keep an umbrella handy for sudden downpours. You can typically expect 12 days of rain this month, averaging around 80 mm (3.1 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Cupertino in December

Daytime temperatures in Cupertino reach 15°C (59°F) in December, dropping to 5°C (41°F) at night. December marks the winter season. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. During December, the city enjoys the most temperate climate of the year.

Sunshine in Cupertino in December

The city usually sees around 160 hours of sunlight, indicating a moderately sunny period.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Cupertino. Our weather planner can help you explore destinations with more pleasant weather conditions.

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• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Cupertino's climate page.

Cupertino Temperature in December

Min Temperature 5°C (41°F)  

Max Temperature 15°C (59°F)  

Chance of Rain 40%  

Precipitation 80 mm (3.1 in)  

Rainy days 12 days  

Humidity 78% *  

Sunshine 160 hours *  

Percentage Sunshine 54% *  

* Data from: San Francisco, the United States of America (45 KM, 28 Miles).

What to Wear in Cupertino in December

Pack for changing conditions in Cupertino in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Cupertino in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Cupertino's climate page.

More climate data for Cupertino

Temperature Rainfall Sunshine Humidity

See the full Cupertino climate overview or explore weather in the United States of America.