Napa Weather in January

January in Napa brings moderate temperatures, with daytime highs of 15°C (59°F) and nights around 4°C (39°F). Quite a bit of rainfall is expected, around 91 mm (3.6 in), so pack an umbrella.

Rainfall in Napa in January

Records from the past 30 years suggest around 9 days of rain, with 91 mm (3.6 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Napa in January

Daytime temperatures in Napa reach 15°C (59°F) in January, dropping to 4°C (39°F) at night. The month of January belongs to the winter season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Napa in January

The city usually sees around 190 hours of sunlight, indicating many sunny days — a great month for sightseeing.

For Napa itself, April, May, June, July, August and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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 Napa's climate page.

Napa Temperature in January

Min Temperature 4°C (39°F)  

Max Temperature 15°C (59°F)  

Chance of Rain 30%  

Precipitation 91 mm (3.6 in)  

Rainy days 9 days  

Sunshine 190 hours *  

Percentage Sunshine 60% *  

* Data from: Healdsburg, the United States of America (61 KM, 38 Miles).

What to Wear in Napa in January

Pack for changing conditions in Napa in January. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Napa 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

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 Napa's climate page.

More climate data for Napa

Temperature Rainfall Sunshine

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