National Weather Service

News Headlines

SCN26-50: Discontinuation of the State Forecast Product (SFP) for all NWS Central Region, Southern Region, and Western Region Offices: Effective June 29, 2026
The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will now be discontinued on July 7, 2026.

Current conditions at

ROCKY BOY (ROCM8)

Lat: 48.17478°NLon: 109.64728°WElev: 4700.0ft.

61°F

16°C

Humidity	NA
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	NA

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

18 Miles NNE Iliad MT

This Afternoon
High: 71 °F
Partly Sunny
Tonight
Low: 55 °F
Chance
Showers
Tuesday
High: 79 °F
Mostly Sunny
then Mostly
Sunny and
Windy
Tuesday Night
Low: 48 °F
Showers and
Windy then
Chance
Showers
Wednesday
High: 62 °F
Sunny then
Chance
Showers and
Breezy
Wednesday Night
Low: 44 °F
Partly Cloudy
Thursday
High: 65 °F
Mostly Sunny
then Slight
Chance
T-storms
Thursday Night
Low: 47 °F
Partly Cloudy
Juneteenth
High: 71 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Partly sunny, with a high near 71. West northwest wind around 10 mph, with gusts as high as 20 mph.

Tonight

A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 55. West northwest wind 5 to 8 mph becoming light and variable.

Tuesday

Mostly sunny, with a high near 79. Windy, with a west wind 9 to 19 mph increasing to 23 to 33 mph. Winds could gust as high as 50 mph.

Tuesday Night

Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 48. Windy, with a west northwest wind 28 to 33 mph decreasing to 16 to 21 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 80%.

Wednesday

A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 62. Breezy, with a west northwest wind 15 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 40%.

Wednesday Night

Partly cloudy, with a low around 44. North northwest wind 11 to 16 mph becoming light west northwest after midnight. Winds could gust as high as 30 mph.

Thursday

A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 65. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

Thursday Night

Partly cloudy, with a low around 47. North northwest wind 5 to 8 mph becoming calm in the evening.

Juneteenth

Mostly sunny, with a high near 71.

Friday Night

Partly cloudy, with a low around 52.

Saturday

Mostly sunny, with a high near 72.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 50.

Sunday

A chance of showers. Partly sunny, with a high near 69.