Big Sandy, MT Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Big Sandy, MT in one place.
Partly sunny, with a high near 82. Northwest wind 3 to 8 mph.
Local Weather Overview
This forecast page for Big Sandy, 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: Aug 17, 2026 10:07 AM MDT.
The active forecast window currently covers Aug 17 to Aug 23, 2026 for Big Sandy, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 17 to Aug 23, 2026
- Latest sync
- Aug 17, 2026 10:07 AM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Big Sandy
Friday looks like the warmest upcoming period in Big Sandy at 89 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 53 degrees F.
The strongest winds are forecast for Friday Night at about 7 to 14 mph ESE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 17, 2026 10:07 AM MDT
- Coverage
- 8 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KTFX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 55. East northeast wind 3 to 8 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 83. South wind around 3 mph.
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53. South wind around 3 mph. Chance of precipitation is 30%.
Sunny, with a high near 85. West southwest wind 3 to 8 mph.
Mostly clear, with a low around 54. East northeast wind 1 to 7 mph.
Sunny, with a high near 86. West southwest wind around 3 mph.
Mostly clear, with a low around 55. Northeast wind around 5 mph.
Sunny, with a high near 89.
Partly cloudy, with a low around 60.
Mostly sunny, with a high near 89.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Mostly sunny, with a high near 84.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Aug 17
|
Partly Sunny
|
82°F |
3 to 8 mph
NW
|
|
Tonight
Aug 17
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
55°F |
3 to 8 mph
ENE
|
|
Tuesday
Aug 18
|
Mostly Sunny
|
83°F |
3 mph
S
|
|
Tuesday Night
Aug 18
|
Chance Showers And Thunderstorms then Partly Cloudy
|
53°F |
3 mph
S
|
|
Wednesday
Aug 19
|
Sunny
|
85°F |
3 to 8 mph
WSW
|
|
Wednesday Night
Aug 19
|
Mostly Clear
|
54°F |
1 to 7 mph
ENE
|
|
Thursday
Aug 20
|
Sunny
|
86°F |
3 mph
WSW
|
|
Thursday Night
Aug 20
|
Mostly Clear
|
55°F |
5 mph
NE
|
|
Friday
Aug 21
|
Sunny
|
89°F |
2 to 6 mph
ESE
|
|
Friday Night
Aug 21
|
Partly Cloudy
|
60°F |
7 to 14 mph
ESE
|
|
Saturday
Aug 22
|
Mostly Sunny
|
89°F |
9 mph
SE
|
|
Saturday Night
Aug 22
|
Chance Showers And Thunderstorms
|
57°F |
3 to 8 mph
SSE
|
|
Sunday
Aug 23
|
Mostly Sunny
|
84°F |
3 to 9 mph
SW
|
|
Sunday Night
Aug 23
|
Slight Chance Rain Showers then Partly Cloudy
|
53°F |
2 to 8 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Big Sandy.