Sunnyvale Weather in January

January in Sunnyvale brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 5°C (41°F). Expect around 54 mm (2.1 in) of rainfall during the month.

Rainfall in Sunnyvale in January

This month experiences about 8 days of rain according to historical data, averaging 54 mm (2.1 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Sunnyvale in January

In January, Sunnyvale gets moderate temperatures, with highs of 16°C (61°F). Nights cool to around 5°C (41°F). January is a notable month of the winter season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Sunnyvale in January

The month brings about 186 hours of sunlight, offering a comfortable mix of sun and overcast.

If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Sunnyvale. Our weather planner can help you explore destinations with more pleasant weather conditions.

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• January
• February
• March
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• May
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• 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 Sunnyvale's climate page.

Sunnyvale Temperature in January

Min Temperature 5°C (41°F)  

Max Temperature 16°C (61°F)  

Chance of Rain 27%  

Precipitation 54 mm (2.1 in)  

Rainy days 8 days  

Humidity 80% *  

Sunshine 186 hours *  

Percentage Sunshine 61% *  

* Data from: San Francisco, the United States of America (41 KM, 25 Miles).

What to Wear in Sunnyvale in January

The weather can swing between comfortable and chilly in January, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Sunnyvale in January

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

Swimming

5/10

Cycling

6/10

Walking

6/10

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 Sunnyvale's climate page.

More climate data for Sunnyvale

Temperature Rainfall Sunshine Humidity

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