Custer County, MT Weather Forecast
County weather hub
Sunny
Compare major city weather across Custer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 105. East wind 6 to 10 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
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 5:26 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 105 degrees F.
Saturday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Tuesday Night at about 8 to 13 mph E.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 5:26 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
Partly cloudy, with a low around 73. East wind 8 to 13 mph.
Sunny, with a high near 102. South wind around 7 mph.
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 70. North wind 5 to 12 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 97. North wind 3 to 7 mph.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. East northeast wind around 8 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 100. East southeast wind 6 to 9 mph.
A slight chance of showers and thunderstorms. Partly cloudy. Low around 70, with temperatures rising to around 72 overnight. East wind 7 to 10 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 97. North wind 7 to 13 mph.
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 67. North northeast wind 3 to 13 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
105°F |
6 to 10 mph
E
|
|
Tuesday Night
Jul 14
|
Partly Cloudy
|
73°F |
8 to 13 mph
E
|
|
Wednesday
Jul 15
|
Sunny
|
102°F |
7 mph
S
|
|
Wednesday Night
Jul 15
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
70°F |
5 to 12 mph
N
|
|
Thursday
Jul 16
|
Mostly Sunny
|
97°F |
3 to 7 mph
N
|
|
Thursday Night
Jul 16
|
Slight Chance Showers And Thunderstorms
|
69°F |
8 mph
ENE
|
|
Friday
Jul 17
|
Mostly Sunny
|
100°F |
6 to 9 mph
ESE
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
70°F |
7 to 10 mph
E
|
|
Saturday
Jul 18
|
Mostly Sunny
|
97°F |
7 to 13 mph
N
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
3 to 13 mph
NNE
|
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.
