Weather forecast for tomorrowRoundup, MT
Weather forecast for tomorrow
Monday Oct 19, 2026
- 68°F
- 41°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 12mphSSW 213°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:37 am MDT
- Sunset: 6:20 pm MDT
- details ▼
Tomorrow, sunny skies are in store, with excellent visibility.
Day and night temperatures will contrast sharply, ranging from a peak of an agreeable 68°F to a low of a wintry 41°F.
The predicted high will feel warmer, consistent with September's climate average of 72.7°F.
Sunrise will be at 7:37 am and sunset at 6:20 pm; tomorrow's daylight will last for 10h and 43min.
Day and night temperatures will contrast sharply, ranging from a peak of an agreeable 68°F to a low of a wintry 41°F.
The predicted high will feel warmer, consistent with September's climate average of 72.7°F.
Sunrise will be at 7:37 am and sunset at 6:20 pm; tomorrow's daylight will last for 10h and 43min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 66°C.
Coldest hour: 6 am 37°C.
Coldest hour: 6 am 37°C.
Chance of precipitation
Highest chance: 6 am 5%.
Hourly weather forecast
- 12 am
- 45°F
- Feels like:41°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphNE 49°
- Humidity: 59%
- Pressure: 30.12"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphN 7°
- Humidity: 67%
- Pressure: 30.09"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 37°F
- Feels like:34°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 5mphW 267°
- Humidity: 73%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 37°F
- Feels like:32°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSW 232°
- Humidity: 76%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:37 am
- 8 am
- 36°F
- Feels like:30°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 9mphSW 224°
- Humidity: 82%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 46°F
- Feels like:41°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSW 227°
- Humidity: 66%
- Pressure: 30.03"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 12 pm
- 57°F
- Feels like:55°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSW 226°
- Humidity: 46%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 2 pm
- 64°F
- Feels like:64°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSW 217°
- Humidity: 36%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 68°F
- Feels like:68°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSSW 198°
- Humidity: 35%
- Pressure: 29.83"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 63°F
- Feels like:61°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSSE 159°
- Humidity: 42%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:20 pm
- 8 pm
- 55°F
- Feels like:54°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphS 190°
- Humidity: 49%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 52°F
- Feels like:48°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphWSW 248°
- Humidity: 56%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, a combination of sun-filled and overcast weather is expected.
The temperature will vary between a minimum of 35.6°F and a maximum of 68°F. The warmest part of the day will be around 4 pm.
The forecasted maximum is more consistent with September's typical high of 72.7°F than the average for October. The expected low will be in line with the average minimum in October, which is 39.7°F.
The temperature will vary between a minimum of 35.6°F and a maximum of 68°F. The warmest part of the day will be around 4 pm.
The forecasted maximum is more consistent with September's typical high of 72.7°F than the average for October. The expected low will be in line with the average minimum in October, which is 39.7°F.
Updated: Oct 18, 2026 @ 06:11:40 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
Tomorrow, in Roundup, sunny skies and pleasant visibility are expected.
Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 41°F.
The highest temperature will be notably higher than the average maximum of 56.3°F in October. The lowest temperature will be in line with the average low of 39.7°F.
The highest temperature will be notably higher than the average maximum of 56.3°F in October. The lowest temperature will be in line with the average low of 39.7°F.
On Monday, in Roundup, sunrise will be at 7:37 am and sunset at 6:20 pm (MDT).
In Roundup, tomorrow, there will be 10h and 43min of daylight.
