Yellowstone County, MT Weather Forecast
County weather hub
Partly Sunny then Slight Chance Rain Showers
Compare major city weather across Yellowstone County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers after noon. Partly sunny. High near 57, with temperatures falling to around 55 in the afternoon. West southwest wind around 3 mph. Chance of precipitation is 20%.
County Weather Overview
This county weather page brings together forecast coverage for Yellowstone County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 3 of 3 mapped cities in Yellowstone County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 13 to Oct 15, 2026
- Latest sync
- Oct 9, 2026 5:06 AM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Yellowstone County
Wednesday looks like the warmest upcoming period in Yellowstone County at 61 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Thursday at about 14 to 17 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 9, 2026 5:06 AM MDT
- Coverage
- 3 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
A chance of rain showers. Partly cloudy. Low around 39, with temperatures rising to around 41 overnight. Northwest wind around 5 mph. Chance of precipitation is 30%.
A chance of rain showers. Partly sunny. High near 61, with temperatures falling to around 59 in the afternoon. West northwest wind 6 to 10 mph. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a low around 41. Northwest wind 9 to 16 mph. Chance of precipitation is 40%.
A chance of rain showers. Partly sunny. High near 58, with temperatures falling to around 55 in the afternoon. Northwest wind 14 to 17 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Partly Sunny then Slight Chance Rain Showers
|
57°F |
3 mph
WSW
|
|
Tuesday Night
Oct 13
|
Chance Rain Showers
|
39°F |
5 mph
NW
|
|
Wednesday
Oct 14
|
Chance Rain Showers
|
61°F |
6 to 10 mph
WNW
|
|
Wednesday Night
Oct 14
|
Chance Rain Showers
|
41°F |
9 to 16 mph
NW
|
|
Thursday
Oct 15
|
Chance Rain Showers
|
58°F |
14 to 17 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Yellowstone County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Yellowstone County.
Largest mapped city population in this region: 117,445.
