Diamond Bar Weather in January

January in Diamond Bar brings pleasant temperatures, with highs of 21°C (70°F) and nights dropping to 7°C (45°F). With perfect weather conditions overall, it's a good time to visit.

Rainfall in Diamond Bar in January

You can expect rain on around 6 days based on historical patterns, with 55 mm (2.2 in) average for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.

Temperature in Diamond Bar in January

Diamond Bar in January is worth a visit. The temperature is perfect, with 21°C (70°F) during the day and 7°C (45°F) at night. During January, the winter season is in full swing. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Diamond Bar in January

Enjoy a sunny month with about 198 hours of sunshine, the clear skies make Diamond Bar even more beautiful.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, May, October and November typically offer the best weather for Diamond Bar.

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• January
• February
• March
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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 Diamond Bar's climate page.

Diamond Bar Temperature in January

Min Temperature 7°C (45°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 20%  

Precipitation 55 mm (2.2 in)  

Rainy days 6 days  

Sunshine 198 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (28 KM, 17 Miles).

What to Wear in Diamond Bar in January

For Diamond Bar in January, 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Diamond Bar 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

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 Diamond Bar's climate page.

More climate data for Diamond Bar

Temperature Rainfall Sunshine

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