Weather forecast for 10 daysSaint Charles, ID
Weather forecast for the weekend
Sunday Oct 18, 2026
- 63°F
- 34°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 5mphNNE 24°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:42 am MDT
- Sunset: 6:39 pm MDT
- details ▼
On Sunday, in Saint Charles, conditions will remain bright with clear skies.
A wide temperature range is predicted, from a high of an enjoyable 62.6°F to a low of an icy 33.8°F.
Tomorrow, the predicted high will be higher and much closer to September's average high of 68.4°F than October's 50.7°F.
Sunrise will be at 7:42 am and sunset at 6:39 pm; tomorrow's daylight will last for 10h and 57min.
A wide temperature range is predicted, from a high of an enjoyable 62.6°F to a low of an icy 33.8°F.
Tomorrow, the predicted high will be higher and much closer to September's average high of 68.4°F than October's 50.7°F.
Sunrise will be at 7:42 am and sunset at 6:39 pm; tomorrow's daylight will last for 10h and 57min.
10-day overview
Daily temperatures
Warmest day: Wednesday 64°C.
Coldest period: Friday - Saturday 48°C.
Coldest period: Friday - Saturday 48°C.
Chance of precipitation
Highest chance: Friday 80%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 30°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphWNW 301°
- Humidity: 69%
- UV index: 0
- Sunrise: 7:40 am MDT
- Sunset: 6:40 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 63°F
- 34°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 5mphNNE 24°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:42 am MDT
- Sunset: 6:39 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 63°F
- 37°F
Mostly Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphENE 64°
- Humidity: 61%
- UV index: 4
- Sunrise: 7:43 am MDT
- Sunset: 6:37 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 63°F
- 37°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 4mphNE 39°
- Humidity: 74%
- UV index: 3
- Sunrise: 7:44 am MDT
- Sunset: 6:36 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 64°F
- 41°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 6mphESE 103°
- Humidity: 73%
- UV index: 4
- Sunrise: 7:45 am MDT
- Sunset: 6:34 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 61°F
- 41°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0.31"
- Wind: 7mphSE 124°
- Humidity: 81%
- UV index: 3
- Sunrise: 7:46 am MDT
- Sunset: 6:33 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 48°F
- 30°F
Rain
- Precip. probability: 80%
- Precipitation: 0.39"
- Wind: 9mphWSW 258°
- Humidity: 94%
- UV index: 2
- Sunrise: 7:47 am MDT
- Sunset: 6:31 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 48°F
- 30°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 6mphNW 314°
- Humidity: 80%
- UV index: 3
- Sunrise: 7:49 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 54°F
- 34°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 7mphSE 143°
- Humidity: 74%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:28 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 54°F
- 32°F
Partly Cloudy
- Precip. probability: 18%
- Precipitation: 0"
- Wind: 7mphSE 128°
- Humidity: 73%
- UV index: 3
- Sunrise: 7:51 am MDT
- Sunset: 6:27 pm MDT
- details ▼
For the next ten days, a combination of primarily cloudy and occasionally clear and rain-filled weather is predicted.
Rainfall is anticipated on Thursday and Friday.
Temperature variation will be noticeable in the upcoming days. The temperature is expected to swing from 48.2°F up to 64.4°F, while the forecast minimum temperature falls between 30.2°F and 41°F.
Expect the warmest day on Wednesday, with temperatures peaking at 64.4°F; Friday and next Saturday, with the highest temperature of 48.2°F, will be the coldest days in Saint Charles, Idaho.
Rainfall is anticipated on Thursday and Friday.
Temperature variation will be noticeable in the upcoming days. The temperature is expected to swing from 48.2°F up to 64.4°F, while the forecast minimum temperature falls between 30.2°F and 41°F.
Expect the warmest day on Wednesday, with temperatures peaking at 64.4°F; Friday and next Saturday, with the highest temperature of 48.2°F, will be the coldest days in Saint Charles, Idaho.
Updated: Oct 18, 2026 @ 05:11:51 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, sunny conditions are expected to continue.
Tomorrow, the highest temperature will be 62.6°F, while the lowest temperature will be 33.8°F.
The highest temperature will be noticeably higher than the average maximum of 50.7°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 50.7°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Saint Charles, sunrise will be at 7:42 am and sunset at 6:39 pm (MDT).
Tomorrow, the daylight will last for 10h and 57min.
