Westby, MT Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Westby, MT in one place.
Partly sunny, with a high near 62. West southwest wind 12 to 20 mph, with gusts as high as 26 mph.
Local Weather Overview
This forecast page for Westby, 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 14, 2026 10:13 AM MDT.
The active forecast window currently covers Apr 15 to Apr 20, 2026 for Westby, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 20, 2026
- Latest sync
- Apr 14, 2026 10:13 AM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Westby
Monday looks like the warmest upcoming period in Westby at 65 degrees F.
Friday Night is the coolest period ahead with temperatures near 18 degrees F.
The strongest winds are forecast for Friday at about 18 to 24 mph NNW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 10:13 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- GGW
- Radar station
- KGGW
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain likely. Mostly cloudy, with a low around 34. North northeast wind 8 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Rain likely before 9am, then rain and snow likely. Mostly cloudy, with a high near 45. North northeast wind 20 to 23 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
A chance of snow. Mostly cloudy, with a low around 21. North northwest wind 17 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
A slight chance of snow before noon. Mostly cloudy, with a high near 33. North northwest wind 18 to 24 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 18. Northwest wind 12 to 22 mph, with gusts as high as 30 mph.
Mostly sunny, with a high near 42. Northwest wind 12 to 18 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 21. West wind 8 to 16 mph, with gusts as high as 23 mph.
Sunny, with a high near 54. South wind 8 to 15 mph, with gusts as high as 21 mph.
Mostly clear, with a low around 31.
Sunny, with a high near 65.
Partly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Partly Sunny
|
62°F |
12 to 20 mph
WSW
|
|
Wednesday Night
Apr 15
|
Light Rain Likely
|
34°F |
8 to 16 mph
NNE
|
|
Thursday
Apr 16
|
Rain And Snow Likely
|
45°F |
20 to 23 mph
NNE
|
|
Thursday Night
Apr 16
|
Chance Light Snow
|
21°F |
17 to 23 mph
NNW
|
|
Friday
Apr 17
|
Slight Chance Light Snow then Mostly Cloudy
|
33°F |
18 to 24 mph
NNW
|
|
Friday Night
Apr 17
|
Partly Cloudy
|
18°F |
12 to 22 mph
NW
|
|
Saturday
Apr 18
|
Mostly Sunny
|
42°F |
12 to 18 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
21°F |
8 to 16 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
8 to 15 mph
S
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
31°F |
15 mph
SE
|
|
Monday
Apr 20
|
Sunny
|
65°F |
15 to 24 mph
SE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
39°F |
15 to 22 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Westby.