Custer County, MT Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Custer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny. High near 80, with temperatures falling to around 78 in the afternoon. South wind around 5 mph.
County Weather Overview
This county weather page brings together forecast coverage for Custer County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Custer County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 1:50 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Custer County
Saturday looks like the warmest upcoming period in Custer County at 80 degrees F.
Monday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Sunday at about 7 to 10 mph WNW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 1:50 PM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- BYZ
- Radar station
- KGGW
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Southwest wind around 6 mph. Chance of precipitation is 50%.
A chance of rain showers. Partly sunny, with a high near 68. West northwest wind 7 to 10 mph. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a low around 42. North wind around 8 mph. Chance of precipitation is 50%.
A chance of rain showers before noon, then showers and thunderstorms likely. Mostly cloudy. High near 52, with temperatures falling to around 50 in the afternoon. North northeast wind 6 to 10 mph. Chance of precipitation is 70%.
A chance of rain showers before 3am, then a chance of rain and snow showers. Mostly cloudy, with a low around 34. North northeast wind 3 to 10 mph. Chance of precipitation is 50%.
A slight chance of rain and snow showers. Partly sunny, with a high near 54. North wind around 5 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 36. South wind around 5 mph.
Mostly sunny, with a high near 64. West southwest wind 3 to 9 mph.
A slight chance of rain showers. Mostly cloudy. Low around 40, with temperatures rising to around 42 overnight. West wind around 8 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Mostly Sunny
|
80°F |
5 mph
S
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms
|
49°F |
6 mph
SW
|
|
Sunday
Apr 12
|
Chance Rain Showers
|
68°F |
7 to 10 mph
WNW
|
|
Sunday Night
Apr 12
|
Chance Rain Showers
|
42°F |
8 mph
N
|
|
Monday
Apr 13
|
Showers And Thunderstorms Likely
|
52°F |
6 to 10 mph
NNE
|
|
Monday Night
Apr 13
|
Chance Rain Showers then Chance Rain And Snow Showers
|
34°F |
3 to 10 mph
NNE
|
|
Tuesday
Apr 14
|
Slight Chance Rain And Snow Showers
|
54°F |
5 mph
N
|
|
Tuesday Night
Apr 14
|
Partly Cloudy
|
36°F |
5 mph
S
|
|
Wednesday
Apr 15
|
Mostly Sunny
|
64°F |
3 to 9 mph
WSW
|
|
Wednesday Night
Apr 15
|
Slight Chance Rain Showers
|
40°F |
8 mph
W
|
Major City Forecasts
Live forecast snapshots for major cities across Custer County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Custer County.
Largest mapped city population in this region: 8,264.
