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 90, with temperatures falling to around 87 in the afternoon. South southeast wind 8 to 21 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
- May 26 to May 27, 2026
- Latest sync
- May 21, 2026 5:43 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Custer County
Tuesday looks like the warmest upcoming period in Custer County at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Tuesday Night at about 18 to 23 mph SSE.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 21, 2026 5:43 PM MDT
- Coverage
- 3 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 58. South southeast wind 18 to 23 mph. Chance of precipitation is 30%.
A chance of rain showers after noon. Partly sunny, with a high near 79. South southeast wind 15 to 22 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before midnight. Partly cloudy. Low around 54, with temperatures rising to around 56 overnight. Southeast wind 9 to 15 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Mostly Sunny
|
90°F |
8 to 21 mph
SSE
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms
|
58°F |
18 to 23 mph
SSE
|
|
Wednesday
May 27
|
Partly Sunny then Chance Rain Showers
|
79°F |
15 to 22 mph
SSE
|
|
Wednesday Night
May 27
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
54°F |
9 to 15 mph
SE
|
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.
