Custer, MT Weather Forecast
Local 7-day forecast
Patchy Fog then Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Custer, MT in one place.
Patchy fog before 9am. Partly sunny, with a high near 81. East wind 6 to 10 mph.
Local Weather Overview
This forecast page for Custer, 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 16, 2026 3:57 PM MDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Custer, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 3:57 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Custer
Thursday looks like the warmest upcoming period in Custer at 81 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Thursday at about 6 to 10 mph E.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 3:57 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
Mostly cloudy, with a low around 54. South southeast wind 5 to 8 mph.
Patchy fog before 9am, then a chance of rain showers. Partly sunny, with a high near 81. West wind 5 to 8 mph. Chance of precipitation is 30%.
Showers and thunderstorms before 3am, then rain showers and patchy fog. Cloudy, with a low around 56. North wind around 8 mph. Chance of precipitation is 100%.
Showers and thunderstorms. Cloudy, with a high near 69. North northwest wind 3 to 8 mph. Chance of precipitation is 90%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 52. North northwest wind 1 to 7 mph. Chance of precipitation is 70%.
A chance of rain showers. Mostly cloudy, with a high near 72. West northwest wind 3 to 7 mph. Chance of precipitation is 40%.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 50. North northeast wind 0 to 5 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 77. West southwest wind 0 to 5 mph.
Mostly clear, with a low around 50. East northeast wind around 2 mph.
Mostly sunny, with a high near 77. Northwest wind 1 to 5 mph.
Mostly clear, with a low around 48. Northeast wind 0 to 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Patchy Fog then Partly Sunny
|
81°F |
6 to 10 mph
E
|
|
Thursday Night
Sep 17
|
Mostly Cloudy
|
54°F |
5 to 8 mph
SSE
|
|
Friday
Sep 18
|
Patchy Fog then Chance Rain Showers
|
81°F |
5 to 8 mph
W
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms
|
56°F |
8 mph
N
|
|
Saturday
Sep 19
|
Showers And Thunderstorms
|
69°F |
3 to 8 mph
NNW
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms Likely
|
52°F |
1 to 7 mph
NNW
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
72°F |
3 to 7 mph
WNW
|
|
Sunday Night
Sep 20
|
Slight Chance Rain Showers then Partly Cloudy
|
50°F |
0 to 5 mph
NNE
|
|
Monday
Sep 21
|
Mostly Sunny
|
77°F |
0 to 5 mph
WSW
|
|
Monday Night
Sep 21
|
Mostly Clear
|
50°F |
2 mph
ENE
|
|
Tuesday
Sep 22
|
Mostly Sunny
|
77°F |
1 to 5 mph
NW
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
48°F |
0 to 3 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Custer.