Big Horn County, MT Weather Forecast
County weather hub
Sunny
Compare major city weather across Big Horn County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 93. West wind 5 to 9 mph.
County Weather Overview
This county weather page brings together forecast coverage for Big Horn 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 Big Horn County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:43 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Big Horn County
Sunday looks like the warmest upcoming period in Big Horn County at 95 degrees F.
Monday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Tuesday Night at about 6 to 16 mph E.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 6:43 PM MDT
- Coverage
- 7 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 slight chance of showers and thunderstorms before 9pm. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. East wind around 6 mph. Chance of precipitation is 20%.
Sunny, with a high near 95. West northwest wind 5 to 9 mph.
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.
Sunny, with a high near 89. North northwest wind 6 to 15 mph.
Partly cloudy, with a low around 62. East northeast wind 6 to 15 mph.
Mostly sunny, with a high near 87. East southeast wind 7 to 15 mph.
A slight chance of rain showers after midnight. Mostly cloudy. Low around 63, with temperatures rising to around 65 overnight. East wind 6 to 16 mph. Chance of precipitation is 20%.
Partly sunny, with a high near 89. North wind 6 to 9 mph.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind 5 to 10 mph. Chance of precipitation is 20%.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. East wind 5 to 9 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 64. South southeast wind around 9 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Sunny
|
93°F |
5 to 9 mph
W
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
66°F |
6 mph
E
|
|
Sunday
Jul 19
|
Sunny
|
95°F |
5 to 9 mph
WNW
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
65°F |
5 to 8 mph
SW
|
|
Monday
Jul 20
|
Sunny
|
89°F |
6 to 15 mph
NNW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
62°F |
6 to 15 mph
ENE
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
87°F |
7 to 15 mph
ESE
|
|
Tuesday Night
Jul 21
|
Mostly Cloudy then Slight Chance Rain Showers
|
63°F |
6 to 16 mph
E
|
|
Wednesday
Jul 22
|
Partly Sunny
|
89°F |
6 to 9 mph
N
|
|
Wednesday Night
Jul 22
|
Slight Chance Showers And Thunderstorms
|
64°F |
5 to 10 mph
ESE
|
|
Thursday
Jul 23
|
Chance Showers And Thunderstorms
|
89°F |
5 to 9 mph
E
|
|
Thursday Night
Jul 23
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
64°F |
9 mph
SSE
|
Major City Forecasts
Live forecast snapshots for major cities across Big Horn County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Big Horn County.
Largest mapped city population in this region: 3,705.
