Weather forecast for 10 daysSun Valley, ID
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 34°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSSE 167°
- Humidity: 40%
- UV index: 3
- Sunrise: 7:55 am MDT
- Sunset: 6:49 pm MDT
- details ▼
Tomorrow, on Sunday, October 18, moderate cloud cover will mix with sunshine throughout the day.
Temperature readings will considerable fluctuate from a daytime peak of a breezy 64.4°F to a nighttime low of a cold 33.8°F.
A forecast high of 64.4°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:55 am and sunset at 6:49 pm; tomorrow's daylight will last for 10h and 53min.
Temperature readings will considerable fluctuate from a daytime peak of a breezy 64.4°F to a nighttime low of a cold 33.8°F.
A forecast high of 64.4°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:55 am and sunset at 6:49 pm; tomorrow's daylight will last for 10h and 53min.
10-day overview
Daily temperatures
Warmest period: today - tomorrow 64°C.
Minimum temperature: 43°C.
Minimum temperature: 43°C.
Chance of precipitation
Highest chance: Thursday 67%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 36°F
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphNW 304°
- Humidity: 48%
- UV index: 0
- Sunrise: 7:54 am MDT
- Sunset: 6:50 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 64°F
- 34°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSSE 167°
- Humidity: 40%
- UV index: 3
- Sunrise: 7:55 am MDT
- Sunset: 6:49 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 63°F
- 37°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphSSE 147°
- Humidity: 44%
- UV index: 3
- Sunrise: 7:57 am MDT
- Sunset: 6:47 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 59°F
- 37°F
Mostly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 7mphE 90°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:58 am MDT
- Sunset: 6:45 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 59°F
- 39°F
PM Showers
- Precip. probability: 36%
- Precipitation: 0.08"
- Wind: 8mphE 100°
- Humidity: 73%
- UV index: 3
- Sunrise: 7:59 am MDT
- Sunset: 6:44 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 54°F
- 37°F
Rain
- Precip. probability: 67%
- Precipitation: 0.35"
- Wind: 9mphESE 113°
- Humidity: 90%
- UV index: 2
- Sunrise: 8:00 am MDT
- Sunset: 6:42 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 45°F
- 27°F
Showers
- Precip. probability: 41%
- Precipitation: 0.08"
- Wind: 9mphN 356°
- Humidity: 93%
- UV index: 3
- Sunrise: 8:02 am MDT
- Sunset: 6:41 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 43°F
- 30°F
Partly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 7mphSE 144°
- Humidity: 75%
- UV index: 3
- Sunrise: 8:03 am MDT
- Sunset: 6:39 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 48°F
- 30°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 7mphESE 115°
- Humidity: 77%
- UV index: 3
- Sunrise: 8:04 am MDT
- Sunset: 6:38 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 43°F
- 27°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 6mphESE 117°
- Humidity: 80%
- UV index: 3
- Sunrise: 8:05 am MDT
- Sunset: 6:36 pm MDT
- details ▼
During the ten-day period, overcast, wet and clear weather is expected.
Rain is predicted for Wednesday through Friday.
Temperature differences will be noticeable in the upcoming days. Highs will range from 42.8°F to 64.4°F, while the nightly low temperatures will show also a considerable swing, as the lowest temperatures will be recorded between 26.6°F and 39.2°F.
Sunday will be the warmest day, with a maximum temperature of 64.4°F; with a maximum temperature of 42.8°F, next Saturday and Monday will be the coldest days in Sun Valley.
Rain is predicted for Wednesday through Friday.
Temperature differences will be noticeable in the upcoming days. Highs will range from 42.8°F to 64.4°F, while the nightly low temperatures will show also a considerable swing, as the lowest temperatures will be recorded between 26.6°F and 39.2°F.
Sunday will be the warmest day, with a maximum temperature of 64.4°F; with a maximum temperature of 42.8°F, next Saturday and Monday will be the coldest days in Sun Valley.
Updated: Oct 17, 2026 @ 21:28:29 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, expect a mix of sun and clouds throughout the day.
Tomorrow, the highest temperature will be 64.4°F, while the lowest temperature will be 33.8°F.
The highest temperature will be noticeably higher than the average maximum of 48°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
The highest temperature will be noticeably higher than the average maximum of 48°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Sun Valley, sunrise will be at 7:55 am and sunset at 6:49 pm (MDT).
In Sun Valley, tomorrow, there will be 10h and 53min of daylight.
