Napa 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Napa 7-day weather forecast

created the forecast for Napa, California using data from . This week's high is 91 掳F on Tuesday, while the low is 48 掳F on Saturday. There are expected to be 6 sunny days and precipitation on 0 days this week.

NWS San Francisco CA has issued a coastal flood advisory until Tuesday at 03:00 AM.

Monday, May 18

- High of 84 掳F, low of 62 掳F (14% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (17 mph wind)
- Sunrise at 5:55 AM, sunset at 8:15 PM
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1 / 6
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Tuesday, May 19

- High of 91 掳F, low of 58 掳F (12% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 5:54 AM, sunset at 8:16 PM
2 / 6
Matusciac Alexandru // Shutterstock

Wednesday, May 20

- High of 85 掳F, low of 54 掳F (22% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (6 mph wind)
- Sunrise at 5:54 AM, sunset at 8:17 PM
3 / 6
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Thursday, May 21

- High of 85 掳F, low of 51 掳F (26% humidity)
- Mostly sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (9 UV index)
- Light breeze (6 mph wind)
- Sunrise at 5:53 AM, sunset at 8:18 PM
4 / 6
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Friday, May 22

- High of 79 掳F, low of 51 掳F (36% humidity)
- Overcast with a 0% chance of rain
- Very high risk of harm from sun exposure (10 UV index)
- Light breeze (5 mph wind)
- Sunrise at 5:52 AM, sunset at 8:19 PM
5 / 6
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Saturday, May 23

- High of 75 掳F, low of 48 掳F (36% humidity)
- Mostly sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (10 UV index)
- Light breeze (6 mph wind)
- Sunrise at 5:52 AM, sunset at 8:20 PM
- First quarter moon
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6 / 6
Maxim Grohotov // Shutterstock

Sunday, May 24

- High of 83 掳F, low of 49 掳F (30% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (10 UV index)
- Gentle breeze (8 mph wind)
- Sunrise at 5:51 AM, sunset at 8:20 PM

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