Sourdough, MT Weather Forecast
Local 7-day forecast
Partly Sunny then Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Sourdough, MT in one place.
A chance of rain showers after noon. Partly sunny. High near 67, with temperatures falling to around 63 in the afternoon. Southwest wind 8 to 26 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Sourdough, 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 18, 2026 10:59 AM MDT.
The active forecast window currently covers Apr 22 to Apr 24, 2026 for Sourdough, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 24, 2026
- Latest sync
- Apr 18, 2026 10:59 AM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Sourdough
Wednesday looks like the warmest upcoming period in Sourdough at 67 degrees F.
Friday Night is the coolest period ahead with temperatures near 27 degrees F.
The strongest winds are forecast for Wednesday at about 8 to 26 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 18, 2026 10:59 AM MDT
- Coverage
- 4 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
Rain showers. Mostly cloudy. Low around 38, with temperatures rising to around 41 overnight. West wind 20 to 23 mph. Chance of precipitation is 80%.
Rain showers before 9am, then rain and snow showers. Mostly cloudy. High near 47, with temperatures falling to around 44 in the afternoon. West northwest wind 21 to 26 mph. Chance of precipitation is 80%.
A chance of snow showers. Mostly cloudy, with a low around 28. Northwest wind 9 to 21 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
A chance of snow showers. Partly sunny. High near 46, with temperatures falling to around 44 in the afternoon. Northwest wind 8 to 15 mph. Chance of precipitation is 30%.
A slight chance of snow showers. Mostly cloudy, with a low around 27. North wind 6 to 14 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Partly Sunny then Chance Rain Showers
|
67°F |
8 to 26 mph
SW
|
|
Wednesday Night
Apr 22
|
Rain Showers
|
38°F |
20 to 23 mph
W
|
|
Thursday
Apr 23
|
Rain And Snow Showers
|
47°F |
21 to 26 mph
WNW
|
|
Thursday Night
Apr 23
|
Chance Snow Showers
|
28°F |
9 to 21 mph
NW
|
|
Friday
Apr 24
|
Chance Snow Showers
|
46°F |
8 to 15 mph
NW
|
|
Friday Night
Apr 24
|
Slight Chance Snow Showers
|
27°F |
6 to 14 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sourdough.