National Weather Service

News Headlines

June 2026 Weather Summary

Hazardous Weather Conditions

Extreme Heat Watch in effect from July 11, 06:00 AM MDT until July 13, 06:00 AM MDT

Current conditions at

Kilo - Harlowton (K1KM)

Lat: 46.5°NLon: 109.8°WElev: 4452.0ft.

Clear

78°F

26°C

Humidity	23%
Wind Speed	NNW 16 MPH
Barometer	30.02 in (1016.59 mb)
Dewpoint	38°F (3°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	09 Jul 09:55 AM MDT

More Information:

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

Extended Forecast for

5 Miles SSW Harlowton MT

Extreme Heat Watch July 11, 06:00am until July 13, 06:00am

Click here for hazard details and duration

Extreme Heat Watch

Today
High: 86 °F
Sunny
Tonight
Low: 56 °F
Mostly Clear
Friday
High: 90 °F
Hot
Friday Night
Low: 58 °F
Slight Chance
T-storms then
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 62 °F
Mostly Clear
Sunday
High: 100 °F
Hot
Sunday Night
Low: 65 °F
Partly Cloudy
Monday
High: 93 °F
Hot

Detailed Forecast

Today

Sunny, with a high near 86. West northwest wind 15 to 17 mph.

Tonight

Mostly clear, with a low around 56. West northwest wind 5 to 14 mph.

Friday

Sunny and hot, with a high near 90. Southwest wind 3 to 7 mph.

Friday Night

A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly clear, with a low around 58. West wind 5 to 7 mph becoming northeast in the evening. Chance of precipitation is 20%.

Saturday

Sunny and hot, with a high near 99. West wind 5 to 14 mph.

Saturday Night

Mostly clear, with a low around 62. West wind 5 to 14 mph.

Sunday

Sunny and hot, with a high near 100. South wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon.

Sunday Night

Partly cloudy, with a low around 65. West wind 9 to 18 mph becoming north northwest in the evening.

Monday

Mostly sunny and hot, with a high near 93. West northwest wind 8 to 16 mph becoming east in the afternoon.

Monday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 64. East wind 13 to 18 mph decreasing to 6 to 11 mph after midnight.

Tuesday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Northwest wind 6 to 11 mph becoming east northeast in the afternoon.

Tuesday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East northeast wind 6 to 11 mph becoming west after midnight.

Wednesday

A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. West southwest wind 6 to 11 mph becoming east southeast in the afternoon.