Fort Smith, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fort Smith, MT in one place.
Mostly sunny. High near 72, with temperatures falling to around 66 in the afternoon. Southeast wind 3 to 13 mph.
Local Weather Overview
This forecast page for Fort Smith, 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: Sep 14, 2026 8:37 AM MDT.
The active forecast window currently covers Sep 15 to Sep 20, 2026 for Fort Smith, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 8:37 AM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Fort Smith
Thursday looks like the warmest upcoming period in Fort Smith at 76 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Tuesday at about 3 to 13 mph SE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 8:37 AM 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 47. North wind 5 to 13 mph.
Sunny, with a high near 68. North northwest wind 8 to 13 mph.
Mostly clear, with a low around 47. Southeast wind 3 to 12 mph.
Mostly sunny, with a high near 76. Southeast wind 2 to 8 mph.
A chance of rain showers. Mostly cloudy, with a low around 53. South southwest wind 3 to 7 mph. Chance of precipitation is 40%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny. High near 73, with temperatures falling to around 71 in the afternoon. North northwest wind 3 to 9 mph. Chance of precipitation is 50%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 50. North wind 5 to 8 mph. Chance of precipitation is 60%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny. High near 72, with temperatures falling to around 70 in the afternoon. Northwest wind around 7 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 49. Southwest wind around 9 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 74. West northwest wind around 9 mph.
Mostly clear, with a low around 49. South southeast wind around 7 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Mostly Sunny
|
72°F |
3 to 13 mph
SE
|
|
Tuesday Night
Sep 15
|
Partly Cloudy
|
47°F |
5 to 13 mph
N
|
|
Wednesday
Sep 16
|
Sunny
|
68°F |
8 to 13 mph
NNW
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
47°F |
3 to 12 mph
SE
|
|
Thursday
Sep 17
|
Mostly Sunny
|
76°F |
2 to 8 mph
SE
|
|
Thursday Night
Sep 17
|
Chance Rain Showers
|
53°F |
3 to 7 mph
SSW
|
|
Friday
Sep 18
|
Chance Rain Showers
|
73°F |
3 to 9 mph
NNW
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms Likely
|
50°F |
5 to 8 mph
N
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
72°F |
7 mph
NW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
49°F |
9 mph
SW
|
|
Sunday
Sep 20
|
Mostly Sunny
|
74°F |
9 mph
WNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
49°F |
7 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fort Smith.