Roundup, MT Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Roundup, MT in one place.
Rain showers likely. Cloudy. High near 60, with temperatures falling to around 58 in the afternoon. West wind 9 to 17 mph. Chance of precipitation is 70%.
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: May 30, 2026 7:11 PM MDT.
The active forecast window currently covers May 31 to Jun 5, 2026 for Roundup, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 5, 2026
- Latest sync
- May 30, 2026 7:11 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Roundup
Friday looks like the warmest upcoming period in Roundup at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Sunday at about 9 to 17 mph W.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 7:11 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 chance of rain showers. Mostly cloudy. Low around 41, with temperatures rising to around 44 overnight. West wind 6 to 15 mph. Chance of precipitation is 40%.
A chance of rain showers between noon and 3pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 69. West southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 41. Northeast wind 3 to 7 mph. Chance of precipitation is 60%.
Mostly sunny, with a high near 72. North northeast wind around 6 mph.
A slight chance of showers and thunderstorms before midnight. Mostly cloudy. Low around 43, with temperatures rising to around 45 overnight. North northeast wind 2 to 6 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 74. North wind 2 to 6 mph.
A chance of rain showers after midnight. Mostly cloudy. Low around 45, with temperatures rising to around 47 overnight. North northeast wind 2 to 9 mph. Chance of precipitation is 30%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 74. North northeast wind 2 to 8 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before midnight. Partly cloudy. Low around 46, with temperatures rising to around 48 overnight. North wind 2 to 7 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 80. Southwest wind around 6 mph.
Mostly clear. Low around 48, with temperatures rising to around 50 overnight. East northeast wind 2 to 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 31
|
Rain Showers Likely
|
60°F |
9 to 17 mph
W
|
|
Sunday Night
May 31
|
Chance Rain Showers
|
41°F |
6 to 15 mph
W
|
|
Monday
Jun 1
|
Mostly Sunny then Chance Showers And Thunderstorms
|
69°F |
5 to 8 mph
WSW
|
|
Monday Night
Jun 1
|
Showers And Thunderstorms Likely
|
41°F |
3 to 7 mph
NE
|
|
Tuesday
Jun 2
|
Mostly Sunny
|
72°F |
6 mph
NNE
|
|
Tuesday Night
Jun 2
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
43°F |
2 to 6 mph
NNE
|
|
Wednesday
Jun 3
|
Mostly Sunny
|
74°F |
2 to 6 mph
N
|
|
Wednesday Night
Jun 3
|
Mostly Cloudy then Chance Rain Showers
|
45°F |
2 to 9 mph
NNE
|
|
Thursday
Jun 4
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
74°F |
2 to 8 mph
NNE
|
|
Thursday Night
Jun 4
|
Chance Showers And Thunderstorms then Partly Cloudy
|
46°F |
2 to 7 mph
N
|
|
Friday
Jun 5
|
Mostly Sunny
|
80°F |
6 mph
SW
|
|
Friday Night
Jun 5
|
Mostly Clear
|
48°F |
2 to 6 mph
ENE
|
Nearby Forecasts
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