Home / Local Weather & Traffic / Montana / Roundup / Weather Forecast

Roundup, MT Weather Tomorrow

Access tomorrow's Roundup weather forecast and the next 5 days of weather details, including precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Roundup area and around Musselshell county, Montana.
Updated: Thu Nov 12th 2026 7:45 AM MST
Roundup, MT Weather – 11-12 – Cloudy
68° / 46°
Cloudy
Skies will be cloudy in Roundup, with a high of 68°F and a low of 46°F. There's a very small chance of rainfall, only about 7%. Wind will be moderate, blowing around 11mph on average and gusts of 19.1mph at 10 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 61% at 11 PM and 27% being its lowest at 2 PM. Barometric pressure is its highest of 29.98inHg at 8 AM, a lowest point of 29.8inHg at 11 PM with an avg 29.87inHg.
Roundup, MT Weather – 11-13 – Cloudy
65° / 42°

Weather Tomorrow

Cloudy
In Roundup, skies will be cloudy with highs near 65°F and lows around 42°F. There might be light rainfall having a 11% chance. Winds will be light at 9mph and gusts of 12.9mph at 5 PM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 67% at 2 AM and 28% being its lowest at 2 PM. Barometric pressure is its highest of 29.79inHg at 12 AM, a lowest point of 29.55inHg at 3 PM with an avg 29.65inHg.
Roundup, MT Weather – 11-14 – Cloudy
64° / 42°
Cloudy
Roundup is set for cloudy skies with temperatures peaking at 64°F and dipping to 42°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 8mph and gusts of 13.1mph at 11 PM. Humidity levels should be comfortable, sitting around 51% on average, the maximum being 65% at 2 AM and 30% being its lowest at 2 PM. Barometric pressure is its highest of 29.8inHg at 11 PM, a lowest point of 29.53inHg at 2 AM with an avg 29.62inHg.
Roundup, MT Weather – 11-15 – Sunny
59° / 42°
Sunny
Bright and sunny conditions in Roundup, with a high of 59°F and a low of 42°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 14mph on average and gusts of 30.2mph at 11 PM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 74% at 7 AM and 30% being its lowest at 2 PM. Barometric pressure is its highest of 29.95inHg at 8 AM, a lowest point of 29.83inHg at 12 AM with an avg 29.9inHg.
Roundup, MT Weather – 11-16 – Overcast
61° / 43°
Overcast
Roundup may see overcast, with daytime highs of 61°F and overnight lows near 43°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 10mph and gusts of 29.5mph at 12 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 62% at 11 PM and 29% being its lowest at 2 PM. Barometric pressure is its highest of 29.93inHg at 8 AM, a lowest point of 29.83inHg at 2 PM with an avg 29.89inHg.
Roundup, MT Weather – 11-17 – Overcast
50° / 38°
Overcast
It will be overcast in Roundup, with a high of 50°F and a low of 38°F. There might be light rainfall having a 11% chance. Winds will be light at 9mph and gusts of 20.1mph at 2 AM. Humidity levels should be comfortable, sitting around 50% on average, the maximum being 70% at 11 PM and 36% being its lowest at 2 PM. Barometric pressure is its highest of 30.04inHg at 8 AM, a lowest point of 29.92inHg at 12 AM with an avg 29.98inHg.

Are You Here in Roundup?

Post your own weather forecast or report for Roundup, MT with a photo or video of what you see or read and confirm what others have shared on Signals by LocalConditions.com

Weather Forecast

More Local Information

Bookmark and Share

Get the LocalConditions.com App on Google Play
Sign up for a membership to go Ad free