Rialto Weather in December

Thinking of visiting Rialto 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 Rialto in December

It's the month with the heaviest rainfall, so an umbrella is a must to navigate the wet weather. Records from the past 30 years suggest around 7 days of rain, with 86 mm (3.4 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Rialto in December

Daytime temperatures in Rialto reach 18°C (64°F) in December, dropping to 6°C (43°F) at night. December is part of the winter season. 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. Enjoy a month of mild temperatures, still offering warmth and comfort throughout.

Sunshine in Rialto in December

The days are predominantly sunny, with an estimated total of around 205 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, October and November typically offer the best circumstances for Rialto.

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 Rialto's climate page.

Rialto Temperature in December

Min Temperature 6°C (43°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 24%  

Precipitation 86 mm (3.4 in)  

Rainy days 7 days  

Sunshine 205 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (31 KM, 19 Miles).

What to Wear in Rialto in December

Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Rialto 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 Rialto's climate page.

More climate data for Rialto

Temperature Rainfall Sunshine

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