Weather forecast for 10 daysNapa Junction, CA

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 73°F
  • 48°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 15mphWSW 240°
  • Humidity: 69%
  • UV index: 5
  • Sunrise: 7:21 am PDT
  • Sunset: 6:27 pm PDT
  • ▼
Today, on Sunday, October 18, sunny skies are in store, with excellent visibility.
The temperature is predicted to vary between a maximum of a temperate 73.4°F and a minimum of a chilly 48.2°F.
Today's high is anticipated to coincide with the typical October maximum of 73.6°F.
Sunrise will be at 7:21 am and sunset at 6:27 pm; the daylight will last for 11h and 6min.

10-day overview

Daily temperatures

Warmest day: today 73°C.
Coldest day: Wednesday 64°C.

Chance of precipitation

Highest chance: Wednesday 52%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 73°F
  • 48°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 15mphWSW 240°
  • Humidity: 69%
  • UV index: 5
  • Sunrise: 7:21 am PDT
  • Sunset: 6:27 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 66°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 15mphWSW 245°
  • Humidity: 66%
  • UV index: 5
  • Sunrise: 7:22 am PDT
  • Sunset: 6:25 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 50°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 7mphSSW 209°
  • Humidity: 68%
  • UV index: 3
  • Sunrise: 7:23 am PDT
  • Sunset: 6:24 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 64°F
  • 50°F
Showers
Showers
  • Precip. probability: 52%
  • Precipitation: 0.12"
  • Wind: 7mphSW 229°
  • Humidity: 81%
  • UV index: 2
  • Sunrise: 7:24 am PDT
  • Sunset: 6:23 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 66°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0.16"
  • Wind: 11mphWSW 241°
  • Humidity: 86%
  • UV index: 4
  • Sunrise: 7:25 am PDT
  • Sunset: 6:21 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 9mphWSW 239°
  • Humidity: 76%
  • UV index: 4
  • Sunrise: 7:26 am PDT
  • Sunset: 6:20 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 70°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 10mphSW 225°
  • Humidity: 67%
  • UV index: 4
  • Sunrise: 7:27 am PDT
  • Sunset: 6:19 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 68°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 11mphWSW 239°
  • Humidity: 65%
  • UV index: 4
  • Sunrise: 7:28 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 66°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 9mphSW 222°
  • Humidity: 66%
  • UV index: 4
  • Sunrise: 7:29 am PDT
  • Sunset: 6:16 pm PDT
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 66°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 9mphSW 220°
  • Humidity: 68%
  • UV index: 4
  • Sunrise: 7:30 am PDT
  • Sunset: 6:15 pm PDT
  • ▼
Over the next ten days, a mix of primarily cloud-filled and occasionally bright and damp weather is predicted.
Rainfall is forecasted for Wednesday and Thursday.
In the coming days, the maximum temperature will vary between 64.4°F and 73.4°F, while the low temperature range extends from 42.8°F to 50°F.
Today is the warmest day, with a maximum temperature of 73.4°F; the coldest day will be Wednesday, with a maximum of 64.4°F.
Updated: Oct 18, 2026 @ 07:40:31 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, the forecast calls for abundant sunshine.

Today, the maximum temperature will be 73.4°F, while the minimum temperature will be 48.2°F.
The highest temperature today will be in line with the average maximum temperature in October. The lowest temperature will be a few degrees lower than the average low of 53.2°F.

On Sunday, in Napa Junction, sunrise will be at 7:21 am and sunset at 6:27 pm (PDT).

Today, the daylight will last for 11h and 6min.