Custer County, MT Weather Forecast
County weather hub
Partly Sunny
Compare major city weather across Custer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Partly sunny, with a high near 52. South southwest wind 0 to 3 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
- Oct 13 to Oct 17, 2026
- Latest sync
- Oct 11, 2026 2:38 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 71 degrees F.
Thursday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Thursday at about 6 to 18 mph WNW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Oct 11, 2026 2:38 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 35. West northwest wind around 3 mph.
Mostly sunny. High near 58, with temperatures falling to around 56 in the afternoon. South wind around 3 mph.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 41. South southeast wind around 5 mph. Chance of precipitation is 20%.
Sunny. High near 58, with temperatures falling to around 55 in the afternoon. West northwest wind 6 to 18 mph.
Mostly clear, with a low around 33. Northwest wind 3 to 15 mph.
Sunny. High near 61, with temperatures falling to around 58 in the afternoon. South southeast wind 3 to 10 mph.
Mostly clear, with a low around 39. South southeast wind 6 to 9 mph.
Sunny. High near 71, with temperatures falling to around 67 in the afternoon. South southwest wind around 7 mph.
Mostly clear, with a low around 46. West southwest wind around 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Partly Sunny
|
52°F |
0 to 3 mph
SSW
|
|
Tuesday Night
Oct 13
|
Partly Cloudy
|
35°F |
3 mph
WNW
|
|
Wednesday
Oct 14
|
Mostly Sunny
|
58°F |
3 mph
S
|
|
Wednesday Night
Oct 14
|
Slight Chance Rain Showers then Partly Cloudy
|
41°F |
5 mph
SSE
|
|
Thursday
Oct 15
|
Sunny
|
58°F |
6 to 18 mph
WNW
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
33°F |
3 to 15 mph
NW
|
|
Friday
Oct 16
|
Sunny
|
61°F |
3 to 10 mph
SSE
|
|
Friday Night
Oct 16
|
Mostly Clear
|
39°F |
6 to 9 mph
SSE
|
|
Saturday
Oct 17
|
Sunny
|
71°F |
7 mph
SSW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
46°F |
5 mph
WSW
|
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.
