Weather forecast for 10 daysAlton, ID
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 28°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphNNE 22°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:41 am MDT
- Sunset: 6:38 pm MDT
- details ▼
Tomorrow, the outlook remains bright and sunny.
Considerable temperature fluctuations from a high of a comfortable 64.4°F to a low of a subzero 28.4°F are anticipated.
The forecast high of 64.4°F aligns more closely with September's typical high of 68°F than with October's usual 50.5°F.
Sunrise will be at 7:41 am and sunset at 6:38 pm; tomorrow's daylight will last for 10h and 57min.
Considerable temperature fluctuations from a high of a comfortable 64.4°F to a low of a subzero 28.4°F are anticipated.
The forecast high of 64.4°F aligns more closely with September's typical high of 68°F than with October's usual 50.5°F.
Sunrise will be at 7:41 am and sunset at 6:38 pm; tomorrow's daylight will last for 10h and 57min.
10-day overview
Daily temperatures
Maximum temperature: 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.
- 27°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphNE 36°
- Humidity: 68%
- UV index: 0
- Sunrise: 7:40 am MDT
- Sunset: 6:39 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 64°F
- 28°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphNNE 22°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:41 am MDT
- Sunset: 6:38 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 64°F
- 34°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 5mphSE 135°
- Humidity: 57%
- UV index: 4
- Sunrise: 7:42 am MDT
- Sunset: 6:36 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 63°F
- 34°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 6mphESE 103°
- Humidity: 68%
- UV index: 3
- Sunrise: 7:43 am MDT
- Sunset: 6:35 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 64°F
- 39°F
Partly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 7mphSE 126°
- Humidity: 70%
- UV index: 4
- Sunrise: 7:44 am MDT
- Sunset: 6:33 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 61°F
- 39°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0.28"
- Wind: 8mphSE 129°
- Humidity: 76%
- UV index: 3
- Sunrise: 7:45 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 48°F
- 30°F
Rain
- Precip. probability: 80%
- Precipitation: 0.35"
- Wind: 8mphWSW 243°
- Humidity: 92%
- UV index: 2
- Sunrise: 7:47 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 48°F
- 28°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 6mphNW 309°
- Humidity: 79%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 54°F
- 32°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 7mphSE 138°
- Humidity: 72%
- UV index: 3
- Sunrise: 7:49 am MDT
- Sunset: 6:27 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 54°F
- 32°F
Mostly Sunny
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 7mphSSE 153°
- Humidity: 70%
- UV index: 3
- Sunrise: 7:50 am MDT
- Sunset: 6:26 pm MDT
- details ▼
overcast, mostly clear and rain-filled weather is forecasted.
Rainfall is anticipated on Thursday and Friday.
Temperature variation will be noticeable across the forecast period. The maximum temperature will vary between 48.2°F and 64.4°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 26.6°F and 39.2°F.
The warmest days will be Sunday, Monday and Wednesday, with a maximum of 64.4°F; with a maximum temperature of 48.2°F, Friday and next Saturday will be the coldest days.
Rainfall is anticipated on Thursday and Friday.
Temperature variation will be noticeable across the forecast period. The maximum temperature will vary between 48.2°F and 64.4°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 26.6°F and 39.2°F.
The warmest days will be Sunday, Monday and Wednesday, with a maximum of 64.4°F; with a maximum temperature of 48.2°F, Friday and next Saturday will be the coldest days.
Updated: Oct 18, 2026 @ 02:30:37 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, in Alton, expect bright skies and plenty of sunshine.
Tomorrow, the highest temperature in Alton will be 64.4°F, while the lowest temperature will be 28.4°F.
Tomorrow, the maximum temperature will be noticeably higher than the average highest temperature of 50.5°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
Tomorrow, the maximum temperature will be noticeably higher than the average highest temperature of 50.5°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Alton, sunrise will be at 7:41 am and sunset at 6:38 pm (MDT).
In Alton, tomorrow, there will be 10h and 57min of daylight.
