Napa 7-day weather forecast

Written by:
August 25, 2025
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Napa 7-day weather forecast

Stacker created the forecast for Napa, California using data from OpenWeather. This week's high is 97 °F on Monday, while the low is 55 °F on Saturday. There are expected to be 3 sunny days and rain on 1 day this week.

There are currently no weather alerts.

Monday, September 1

- High of 97 °F, low of 59 °F (14% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (8 mph wind)
- Sunrise at 6:39 AM, sunset at 7:39 PM
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1 / 6
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Tuesday, September 2

- High of 91 °F, low of 60 °F (25% humidity)
- Fair with a 42% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (7 mph wind)
- Sunrise at 6:40 AM, sunset at 7:37 PM
2 / 6
Nataliia K // Shutterstock

Wednesday, September 3

- High of 90 °F, low of 56 °F (25% humidity)
- Partly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (7 mph wind)
- Sunrise at 6:40 AM, sunset at 7:36 PM
3 / 6
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Thursday, September 4

- High of 85 °F, low of 56 °F (30% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (6 mph wind)
- Sunrise at 6:41 AM, sunset at 7:34 PM
4 / 6
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Friday, September 5

- High of 84 °F, low of 57 °F (35% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 6:42 AM, sunset at 7:33 PM
5 / 6
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Saturday, September 6

- High of 85 °F, low of 55 °F (33% humidity)
- Partly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 6:43 AM, sunset at 7:31 PM
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6 / 6
John Cartwright // Shutterstock

Sunday, September 7

- High of 80 °F, low of 59 °F (44% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 6:44 AM, sunset at 7:30 PM
- Full moon

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