Oceanside Weather in December

Thinking of visiting Oceanside in December? Expect pleasant temperatures reaching 18°C (64°F) during the day, dropping to 6°C (43°F) at night, and be prepared for the wettest month of the year.

Rainfall in Oceanside in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. Historically, December sees about 7 days of rain, with a monthly average of 68 mm (2.7 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Oceanside in December

Daytime temperatures in Oceanside reach 18°C (64°F) in December, dropping to 6°C (43°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. 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. Expect the mildest temperatures of the year this month, yet still enjoyably warm.

Sunshine in Oceanside in December

Expect a lot of sunshine this month, with about 231 hours of sun. These sunny conditions add to the overall experience.

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

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 Oceanside's climate page.

Oceanside Temperature in December

Min Temperature 6°C (43°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 23%  

Precipitation 68 mm (2.7 in)  

Rainy days 7 days  

Humidity 64% *  

Sunshine 231 hours *  

Percentage Sunshine 74% *  

* Data from: San Diego, the United States of America (57 KM, 35 Miles).

What to Wear in Oceanside in December

For Oceanside in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Oceanside in December

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

Cycling

10/10

Walking

10/10

Camping

4/10

Outdoor sports

10/10

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 Oceanside's climate page.

More climate data for Oceanside

Temperature Rainfall Sunshine Humidity

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