Fullerton Weather in January

January in Fullerton sees daytime temperatures around 21°C (70°F) and lows of 8°C (46°F) at night. The perfect weather makes it a good time to visit.

Rainfall in Fullerton in January

Historically, the month has about 5 days of rain, averaging 46 mm (1.8 in) in total. Although rain is not especially frequent, individual showers can still be quite heavy.

Temperature in Fullerton in January

The temperature in Fullerton in January is perfect. Daytime highs reach 21°C (70°F), with nights dropping to 8°C (46°F). The month of January belongs to the winter season. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Fullerton in January

Expect sunny days throughout the month, with an estimated 198 hours of sunshine. This makes it a pleasant time to visit Fullerton.

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

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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 Fullerton's climate page.

Fullerton Temperature in January

Min Temperature 8°C (46°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 17%  

Precipitation 46 mm (1.8 in)  

Rainy days 5 days  

Sunshine 198 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (33 KM, 20 Miles).

What to Wear in Fullerton in January

Pleasant temperatures in January 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. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Fullerton in January

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

Swimming

6/10

Cycling

10/10

Walking

10/10

Camping

5/10

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 Fullerton's climate page.

More climate data for Fullerton

Temperature Rainfall Sunshine

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