Westby, MT Weather Forecast
Local 7-day forecast
Chance Rain Showers then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Westby, MT in one place.
A chance of rain showers between 8am and noon, then a chance of showers and thunderstorms between noon and 3pm, then showers and thunderstorms. Mostly cloudy. High near 78, with temperatures falling to around 74 in the afternoon. Southeast wind 17 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.
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: May 30, 2026 9:57 AM MDT.
The active forecast window currently covers May 31 to Jun 5, 2026 for Westby, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 5, 2026
- Latest sync
- May 30, 2026 9:57 AM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Westby
Sunday looks like the warmest upcoming period in Westby at 78 degrees F.
Monday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Sunday at about 17 to 22 mph SE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 9:57 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
Showers and thunderstorms. Cloudy, with a low around 50. South southwest wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
A chance of rain showers. Mostly cloudy, with a high near 69. West southwest wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
A slight chance of rain showers before midnight, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Southwest wind 10 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 74. South wind 10 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. West southwest wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 72. West wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Partly cloudy, with a low around 46. Northwest wind 7 to 17 mph, with gusts as high as 24 mph.
A chance of rain showers after noon. Partly sunny, with a high near 72. North northeast wind 7 to 10 mph.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 76.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 48.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 31
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
78°F |
17 to 22 mph
SE
|
|
Sunday Night
May 31
|
Showers And Thunderstorms
|
50°F |
15 to 18 mph
SSW
|
|
Monday
Jun 1
|
Chance Rain Showers
|
69°F |
16 to 21 mph
WSW
|
|
Monday Night
Jun 1
|
Chance Showers And Thunderstorms
|
46°F |
10 to 18 mph
SW
|
|
Tuesday
Jun 2
|
Chance Showers And Thunderstorms
|
74°F |
10 to 20 mph
S
|
|
Tuesday Night
Jun 2
|
Chance Showers And Thunderstorms
|
46°F |
8 to 16 mph
WSW
|
|
Wednesday
Jun 3
|
Chance Showers And Thunderstorms
|
72°F |
10 to 17 mph
W
|
|
Wednesday Night
Jun 3
|
Partly Cloudy
|
46°F |
7 to 17 mph
NW
|
|
Thursday
Jun 4
|
Partly Sunny then Chance Rain Showers
|
72°F |
7 to 10 mph
NNE
|
|
Thursday Night
Jun 4
|
Chance Showers And Thunderstorms
|
47°F |
12 mph
NE
|
|
Friday
Jun 5
|
Chance Rain Showers
|
76°F |
9 to 15 mph
SSE
|
|
Friday Night
Jun 5
|
Slight Chance Rain Showers then Partly Cloudy
|
48°F |
10 to 15 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Westby.