Weather forecast for 10 daysFairfield, ID

Weather forecast for the weekend

Saturday Oct 17, 2026

  • min.
  • 36°F
Mostly Clear
Mostly Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNE 38°
  • Humidity: 43%
  • UV index: 0
  • Sunrise: 7:55 am MDT
  • Sunset: 6:52 pm MDT
  • ▼
In Fairfield, through the afternoon and beyond, expect a quiet sky, mostly free of clouds.
The lowest forecasted temperature is a cold 35.6°F.
Sunrise was at 7:55 am and sunset will be at 6:52 pm; the daylight will last for 10h and 57min.

Sunday Oct 18, 2026

  • 68°F
  • 36°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphE 94°
  • Humidity: 38%
  • UV index: 4
  • Sunrise: 7:57 am MDT
  • Sunset: 6:51 pm MDT
  • ▼
On Sunday, October 18, expect a partly sunny afternoon with variable cloud cover.
Temperature changes will be considerable, from a high of a pleasant 68°F to a low of an icy 35.6°F.
Tomorrow, the maximum temperature will be higher and more reflective of September's average high of 70.9°F than October's of 54°F.
Sunrise will be at 7:57 am and sunset at 6:51 pm; tomorrow's daylight will last for 10h and 54min.

10-day overview

Daily temperatures

Maximum temperature: 70°C.
Minimum temperature: 48°C.

Chance of precipitation

Highest chance: Thursday 47%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 36°F
Mostly Clear
Mostly Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNE 38°
  • Humidity: 43%
  • UV index: 0
  • Sunrise: 7:55 am MDT
  • Sunset: 6:52 pm MDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 68°F
  • 36°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphE 94°
  • Humidity: 38%
  • UV index: 4
  • Sunrise: 7:57 am MDT
  • Sunset: 6:51 pm MDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 70°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphE 85°
  • Humidity: 39%
  • UV index: 3
  • Sunrise: 7:58 am MDT
  • Sunset: 6:49 pm MDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 66°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 12mphE 82°
  • Humidity: 51%
  • UV index: 3
  • Sunrise: 7:59 am MDT
  • Sunset: 6:48 pm MDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 66°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0.04"
  • Wind: 12mphE 85°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 8:00 am MDT
  • Sunset: 6:46 pm MDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 61°F
  • 41°F
Showers
Showers
  • Precip. probability: 47%
  • Precipitation: 0.28"
  • Wind: 11mphE 87°
  • Humidity: 77%
  • UV index: 3
  • Sunrise: 8:02 am MDT
  • Sunset: 6:45 pm MDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 48°F
  • 28°F
AM Showers
AM Showers
  • Precip. probability: 38%
  • Precipitation: 0.08"
  • Wind: 14mphWNW 287°
  • Humidity: 86%
  • UV index: 3
  • Sunrise: 8:03 am MDT
  • Sunset: 6:43 pm MDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 48°F
  • 32°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 8mphE 81°
  • Humidity: 69%
  • UV index: 3
  • Sunrise: 8:04 am MDT
  • Sunset: 6:42 pm MDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 54°F
  • 32°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 22%
  • Precipitation: 0"
  • Wind: 10mphE 80°
  • Humidity: 69%
  • UV index: 3
  • Sunrise: 8:05 am MDT
  • Sunset: 6:40 pm MDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 48°F
  • 30°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 9mphE 100°
  • Humidity: 72%
  • UV index: 3
  • Sunrise: 8:07 am MDT
  • Sunset: 6:39 pm MDT
  • ▼
Models point to a combination of primarily cloudy and occasionally rain-filled and bright weather is anticipated.
Rainfall is forecasted for Wednesday through Friday.
Noticeable swings in temperature are expected across the forecast period. Highs will range from 48.2°F to 69.8°F, while the lowest night temperatures will vary also significantly, as temperatures overnight will fluctuate from 28.4°F up to 44.6°F.
With the highest temperature of 69.8°F, Monday will be the warmest day; the coldest days will be Friday, next Saturday and Monday, with a maximum of 48.2°F.
Updated: Oct 17, 2026 @ 21:58:08 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, a partly cloudy outlook will keep the sky interesting throughout the day.

Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 35.6°F.
The highest temperature will be notably higher than the average maximum of 54°F in October. The lowest temperature will be in line with the average low of 36.9°F.

On Sunday, in Fairfield, sunrise will be at 7:57 am and sunset at 6:51 pm (MDT).

In Fairfield, the length of the day tomorrow will be 10h and 54min.