Roundup, MT Weather Forecast
Local 7-day forecast
Snow Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Roundup, MT in one place.
Snow showers likely. Mostly cloudy. High near 46, with temperatures falling to around 44 in the afternoon. Northwest wind 10 to 14 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Roundup, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 15, 2026 2:49 PM MDT.
The active forecast window currently covers Apr 16 to Apr 21, 2026 for Roundup, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 2:49 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Roundup
Tuesday looks like the warmest upcoming period in Roundup at 79 degrees F.
Thursday Night is the coolest period ahead with temperatures near 23 degrees F.
The strongest winds are forecast for Thursday at about 10 to 14 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 2:49 PM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- BYZ
- Radar station
- KBLX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of snow showers before midnight. Mostly cloudy, with a low around 23. Northwest wind 5 to 12 mph. Chance of precipitation is 20%.
A chance of snow showers after noon. Mostly sunny, with a high near 48. Northwest wind 5 to 14 mph. Chance of precipitation is 40%.
Mostly cloudy, with a low around 27. Northwest wind 3 to 10 mph.
Sunny, with a high near 61. West wind 5 to 12 mph.
Mostly clear, with a low around 32. West southwest wind 5 to 8 mph.
Sunny, with a high near 71. Southwest wind 6 to 12 mph.
Partly cloudy, with a low around 40. Southwest wind 5 to 9 mph.
Mostly sunny, with a high near 77. West southwest wind 6 to 10 mph.
Mostly clear, with a low around 43. North northeast wind 5 to 9 mph.
Mostly sunny, with a high near 79. West southwest wind 5 to 10 mph.
Partly cloudy. Low around 46, with temperatures rising to around 48 overnight. North wind 6 to 9 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 16
|
Snow Showers Likely
|
46°F |
10 to 14 mph
NW
|
|
Thursday Night
Apr 16
|
Slight Chance Snow Showers then Mostly Cloudy
|
23°F |
5 to 12 mph
NW
|
|
Friday
Apr 17
|
Mostly Sunny then Chance Snow Showers
|
48°F |
5 to 14 mph
NW
|
|
Friday Night
Apr 17
|
Mostly Cloudy
|
27°F |
3 to 10 mph
NW
|
|
Saturday
Apr 18
|
Sunny
|
61°F |
5 to 12 mph
W
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
32°F |
5 to 8 mph
WSW
|
|
Sunday
Apr 19
|
Sunny
|
71°F |
6 to 12 mph
SW
|
|
Sunday Night
Apr 19
|
Partly Cloudy
|
40°F |
5 to 9 mph
SW
|
|
Monday
Apr 20
|
Mostly Sunny
|
77°F |
6 to 10 mph
WSW
|
|
Monday Night
Apr 20
|
Mostly Clear
|
43°F |
5 to 9 mph
NNE
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
79°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
46°F |
6 to 9 mph
N
|
Nearby Forecasts
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Nearby forecast pages are not available for this location yet.
