Rancho Bernardo Weather in December

In Rancho Bernardo, December brings pleasant daytime temperatures around 19°C (66°F), with nights cooling to 6°C (43°F). It is the wettest month of the year, so expect more rainfall than usual.

Rainfall in Rancho Bernardo in December

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Looking at the last 30 years, the data shows about 8 days with rain, averaging 79 mm (3.1 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Rancho Bernardo in December

Daytime temperatures in Rancho Bernardo reach 19°C (66°F) in December, dropping to 6°C (43°F) at night. The winter season takes place during December. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. Experience mild yet warm temperatures during this month, offering a comfortable climate.

Sunshine in Rancho Bernardo in December

Enjoy a sunny month with about 231 hours of sunshine, the clear skies make Rancho Bernardo even more beautiful.

December in Rancho Bernardo has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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

Rancho Bernardo Temperature in December

Min Temperature 6°C (43°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 27%  

Precipitation 79 mm (3.1 in)  

Rainy days 8 days  

Humidity 64% *  

Sunshine 231 hours *  

Percentage Sunshine 74% *  

* Data from: San Diego, the United States of America (35 KM, 21 Miles).

What to Wear in Rancho Bernardo in December

Pleasant temperatures in December mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Rancho Bernardo in December

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

Cycling

9/10

Walking

9/10

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 Rancho Bernardo's climate page.

More climate data for Rancho Bernardo

Temperature Rainfall Sunshine Humidity

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