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.