Sourdough, MT Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sourdough, MT in one place.
Sunny. High near 50, with temperatures falling to around 48 in the afternoon. Northwest wind 6 to 16 mph.
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: Oct 14, 2026 11:32 PM MDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Sourdough, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 14, 2026 11:32 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Sourdough
Saturday looks like the warmest upcoming period in Sourdough at 70 degrees F.
Thursday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Saturday at about 17 to 21 mph WSW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 11:32 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
Partly cloudy, with a low around 30. East wind 3 to 7 mph.
Sunny. High near 63, with temperatures falling to around 60 in the afternoon. Southwest wind 5 to 10 mph.
Mostly clear, with a low around 41. Southwest wind 8 to 16 mph.
Sunny. High near 70, with temperatures falling to around 67 in the afternoon. West southwest wind 17 to 21 mph.
Partly cloudy, with a low around 39. West southwest wind 7 to 12 mph.
Sunny. High near 59, with temperatures falling to around 56 in the afternoon. South southeast wind 3 to 9 mph.
Mostly clear, with a low around 38. Northeast wind 1 to 7 mph.
Sunny. High near 65, with temperatures falling to around 62 in the afternoon. Southwest wind 2 to 7 mph.
Partly cloudy, with a low around 40. Southwest wind around 6 mph.
A chance of rain showers. Partly sunny. High near 57, with temperatures falling to around 53 in the afternoon. Southwest wind around 6 mph. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a low around 37. North wind around 6 mph. Chance of precipitation is 40%.
A slight chance of rain showers. Mostly sunny. High near 50, with temperatures falling to around 48 in the afternoon. Southwest wind 3 to 7 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Sunny
|
50°F |
6 to 16 mph
NW
|
|
Thursday Night
Oct 15
|
Partly Cloudy
|
30°F |
3 to 7 mph
E
|
|
Friday
Oct 16
|
Sunny
|
63°F |
5 to 10 mph
SW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
41°F |
8 to 16 mph
SW
|
|
Saturday
Oct 17
|
Sunny
|
70°F |
17 to 21 mph
WSW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
39°F |
7 to 12 mph
WSW
|
|
Sunday
Oct 18
|
Sunny
|
59°F |
3 to 9 mph
SSE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
38°F |
1 to 7 mph
NE
|
|
Monday
Oct 19
|
Sunny
|
65°F |
2 to 7 mph
SW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
40°F |
6 mph
SW
|
|
Tuesday
Oct 20
|
Chance Rain Showers
|
57°F |
6 mph
SW
|
|
Tuesday Night
Oct 20
|
Chance Rain Showers
|
37°F |
6 mph
N
|
|
Wednesday
Oct 21
|
Slight Chance Rain Showers
|
50°F |
3 to 7 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sourdough.