Weather forecast for tomorrowLewistown, MT
Weather forecast for tomorrow
Monday Oct 19, 2026
- 70°F
- 41°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphSSW 212°
- Humidity: 40%
- UV index: 3
- Sunrise: 7:42 am MDT
- Sunset: 6:23 pm MDT
- details ▼
Tomorrow, clear skies and sunshine are also anticipated.
A significant variation in temperature is forecasted, ranging from a high of an agreeable 69.8°F to a low of a wintry 41°F.
A forecast high of 69.8°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:42 am and sunset at 6:23 pm; tomorrow's daylight will last for 10h and 41min.
A significant variation in temperature is forecasted, ranging from a high of an agreeable 69.8°F to a low of a wintry 41°F.
A forecast high of 69.8°F brings conditions more familiar to September's average than October's.
Sunrise will be at 7:42 am and sunset at 6:23 pm; tomorrow's daylight will last for 10h and 41min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 68°C.
Coldest hour: 6 am 39°C.
Coldest hour: 6 am 39°C.
Chance of precipitation
Highest chance: 6 am 2%.
Hourly weather forecast
- 12 am
- 45°F
- Feels like:39°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphESE 122°
- Humidity: 55%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 7mphSE 137°
- Humidity: 59%
- Pressure: 30.03"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 41°F
- Feels like:36°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 7mphSSE 153°
- Humidity: 63%
- Pressure: 30"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 39°F
- Feels like:36°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphS 180°
- Humidity: 65%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:42 am
- 8 am
- 39°F
- Feels like:36°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphS 183°
- Humidity: 66%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 52°F
- Feels like:50°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphSSW 203°
- Humidity: 49%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 12 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSW 230°
- Humidity: 33%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 2 pm
- 68°F
- Feels like:68°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSW 236°
- Humidity: 25%
- Pressure: 29.8"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 68°F
- Feels like:68°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSW 231°
- Humidity: 25%
- Pressure: 29.8"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphS 189°
- Humidity: 34%
- Pressure: 29.8"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:23 pm
- 8 pm
- 54°F
- Feels like:52°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSSE 166°
- Humidity: 42%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 50°F
- Feels like:48°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphSSE 164°
- Humidity: 46%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, primarily clear and occasionally dull weather is anticipated.
The temperature will be between the lowest temperature of 39.2°F and the highest temperature of 68°F. The warmest part of the day will be from 2 pm to 4 pm.
The maximum temperature will align more closely with September's average high of 67.5°F than with October's 52.2°F. The lowest temperature is expected to be a few degrees higher than the average minimum in October, typically 35.1°F.
The temperature will be between the lowest temperature of 39.2°F and the highest temperature of 68°F. The warmest part of the day will be from 2 pm to 4 pm.
The maximum temperature will align more closely with September's average high of 67.5°F than with October's 52.2°F. The lowest temperature is expected to be a few degrees higher than the average minimum in October, typically 35.1°F.
Updated: Oct 18, 2026 @ 14:38:48 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 Monday, sunny and dry conditions are anticipated.
Tomorrow, the highest temperature will be 69.8°F, while the lowest temperature will be 41°F.
The highest temperature will be significantly higher than the average maximum of 52.2°F in October. The lowest temperature will be relatively higher than the average low of 35.1°F.
The highest temperature will be significantly higher than the average maximum of 52.2°F in October. The lowest temperature will be relatively higher than the average low of 35.1°F.
On Monday, in Lewistown, sunrise will be at 7:42 am and sunset at 6:23 pm (MDT).
Tomorrow, the daylight will last for 10h and 41min.
