Yellowstone County, MT Weather Forecast
County weather hub
Mostly Sunny then Slight Chance Showers And Thunderstorms
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 showers and thunderstorms after noon. Mostly sunny. High near 95, with temperatures falling to around 93 in the afternoon. South southeast wind 3 to 12 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
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 4:12 AM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Yellowstone County
Tuesday looks like the warmest upcoming period in Yellowstone County at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Friday Night at about 8 to 13 mph NW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 4:12 AM MDT
- Coverage
- 5 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 showers and thunderstorms before midnight. Mostly cloudy, with a low around 59. South wind 5 to 12 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms after noon. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. South wind 3 to 8 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. Northeast wind 3 to 9 mph. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. North northeast wind 3 to 9 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before midnight. Partly cloudy. Low around 57, with temperatures rising to around 59 overnight. East northeast wind 5 to 10 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after noon. Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. Southeast wind 3 to 10 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before midnight. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. Northwest wind 8 to 13 mph. Chance of precipitation is 40%.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny. High near 79, with temperatures falling to around 77 in the afternoon. West wind around 9 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
95°F |
3 to 12 mph
SSE
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
59°F |
5 to 12 mph
S
|
|
Wednesday
May 27
|
Partly Sunny then Chance Showers And Thunderstorms
|
86°F |
3 to 8 mph
S
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms
|
56°F |
3 to 9 mph
NE
|
|
Thursday
May 28
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
3 to 9 mph
NNE
|
|
Thursday Night
May 28
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
57°F |
5 to 10 mph
ENE
|
|
Friday
May 29
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
3 to 10 mph
SE
|
|
Friday Night
May 29
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
56°F |
8 to 13 mph
NW
|
|
Saturday
May 30
|
Chance Showers And Thunderstorms
|
79°F |
9 mph
W
|
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.
