AQAMT The Air Quality Alert for Broadwater, Sweet Grass and Yellowstone Counties has been cancelled. For more information visit the Montana Department of Environmental Quality at www.todaysair.mt.gov
Weather in Mc Allister, MT
Updated 2026-08-11 11:45 local time · ZIP codes 59740

Sunny
Active alerts
Next hours
71°0% rain
86°0% rain
88°0% rain
89°1% rain
91°1% rain
90°1% rain
89°1% rain
87°2% rain
78°2% rain
68°2% rain
66°1% rain
65°1% rain3-day weather forecast



Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 2%).
It feels like 71°F with winds near 3 mph.
78°F, 2% rain chance and 10 mph wind.
Visibility is around 8 mi; gusts may reach 19 mph.
Current temperature is 71°F, wind 3 mph, rain chance up to 2%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Mc Allister weather today
Sunny and 71°F in Mc Allister, MT. Today's high is 91°F with a 1% rain chance. Winds are around 3 mph with gusts near 4 mph. Relative humidity is 25%, pressure is 30.13 inHg, and visibility is about 8 miles.
Tonight and tomorrow in Mc Allister
Sunrise is at 06:23 AM and sunset is at 08:41 PM. Tomorrow's forecast calls for Sunny with a high near 86°F and a low near 53°F. The maximum rain chance is 36%.