Foster, MT Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Foster, MT in one place.
Patchy fog before 9am. Sunny, with a high near 71. Southeast wind 2 to 12 mph.
Local Weather Overview
This forecast page for Foster, 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 9:21 PM MDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Foster, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 9:21 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Foster
Thursday looks like the warmest upcoming period in Foster at 79 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Tuesday at about 2 to 12 mph SE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 9:21 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. Low around 42, with temperatures rising to around 45 overnight. Northeast wind 7 to 12 mph.
Sunny, with a high near 68. North northwest wind 7 to 12 mph.
Mostly clear, with a low around 44. East northeast wind 2 to 10 mph.
Mostly sunny, with a high near 79. Southeast wind 1 to 5 mph.
A slight chance of rain showers after midnight. Mostly cloudy, with a low around 52. North northeast wind around 5 mph. Chance of precipitation is 20%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny. High near 75, with temperatures falling to around 73 in the afternoon. North northwest wind 2 to 8 mph. Chance of precipitation is 50%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 50. North northwest wind 2 to 8 mph. Chance of precipitation is 70%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 72. Northwest wind 3 to 8 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 46. West northwest wind around 5 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 73. West northwest wind 2 to 6 mph.
Mostly clear, with a low around 44. East wind 1 to 5 mph.
Mostly sunny, with a high near 78. South southwest wind 1 to 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Patchy Fog then Sunny
|
71°F |
2 to 12 mph
SE
|
|
Tuesday Night
Sep 15
|
Partly Cloudy
|
42°F |
7 to 12 mph
NE
|
|
Wednesday
Sep 16
|
Sunny
|
68°F |
7 to 12 mph
NNW
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
44°F |
2 to 10 mph
ENE
|
|
Thursday
Sep 17
|
Mostly Sunny
|
79°F |
1 to 5 mph
SE
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Slight Chance Rain Showers
|
52°F |
5 mph
NNE
|
|
Friday
Sep 18
|
Chance Rain Showers
|
75°F |
2 to 8 mph
NNW
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms Likely
|
50°F |
2 to 8 mph
NNW
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
72°F |
3 to 8 mph
NW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms then Partly Cloudy
|
46°F |
5 mph
WNW
|
|
Sunday
Sep 20
|
Mostly Sunny
|
73°F |
2 to 6 mph
WNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
44°F |
1 to 5 mph
E
|
|
Monday
Sep 21
|
Mostly Sunny
|
78°F |
1 to 5 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Foster.