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 rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. Southwest wind 3 to 10 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
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:04 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Yellowstone County
Saturday looks like the warmest upcoming period in Yellowstone County at 79 degrees F.
Monday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Monday at about 7 to 13 mph N.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:04 PM MDT
- Coverage
- 6 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. Mostly cloudy, with a low around 46. West southwest wind around 9 mph. Chance of precipitation is 40%.
A chance of rain showers after noon. Mostly sunny. High near 71, with temperatures falling to around 67 in the afternoon. West wind around 9 mph. Chance of precipitation is 50%.
Rain showers likely. Mostly cloudy. Low around 42, with temperatures rising to around 44 overnight. North northeast wind around 9 mph. Chance of precipitation is 70%.
Rain showers likely before noon, then showers and thunderstorms. Mostly cloudy. High near 53, with temperatures falling to around 51 in the afternoon. North wind 7 to 13 mph. Chance of precipitation is 80%.
A chance of rain showers. Mostly cloudy, with a low around 37. North northeast wind 5 to 10 mph. Chance of precipitation is 50%.
A chance of rain showers. Partly sunny, with a high near 61. West wind around 6 mph. Chance of precipitation is 30%.
Partly cloudy, with a low around 39. West southwest wind around 6 mph.
Mostly sunny, with a high near 67. West southwest wind 6 to 13 mph.
A chance of rain showers. Mostly cloudy. Low around 40, with temperatures rising to around 43 overnight. West northwest wind 7 to 12 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
79°F |
3 to 10 mph
SW
|
|
Saturday Night
Apr 11
|
Chance Rain Showers
|
46°F |
9 mph
WSW
|
|
Sunday
Apr 12
|
Mostly Sunny then Chance Rain Showers
|
71°F |
9 mph
W
|
|
Sunday Night
Apr 12
|
Rain Showers Likely
|
42°F |
9 mph
NNE
|
|
Monday
Apr 13
|
Showers And Thunderstorms
|
53°F |
7 to 13 mph
N
|
|
Monday Night
Apr 13
|
Chance Rain Showers
|
37°F |
5 to 10 mph
NNE
|
|
Tuesday
Apr 14
|
Chance Rain Showers
|
61°F |
6 mph
W
|
|
Tuesday Night
Apr 14
|
Partly Cloudy
|
39°F |
6 mph
WSW
|
|
Wednesday
Apr 15
|
Mostly Sunny
|
67°F |
6 to 13 mph
WSW
|
|
Wednesday Night
Apr 15
|
Chance Rain Showers
|
40°F |
7 to 12 mph
WNW
|
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.
