Weather in Sweet Grass, MT
Updated 2026-08-11 11:45 local time · ZIP codes 59484
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
68°3% rain76°1% rain78°1% rain80°1% rain81°0% rain81°0% rain81°0% rain80°0% rain76°0% rain
70°1% rain65°3% rain67°2% 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 3%).
It feels like 68°F with winds near 12 mph.
72°F, 1% rain chance and 9 mph wind.
Visibility is around 6 mi; gusts may reach 24 mph.
Current temperature is 68°F, wind 12 mph, rain chance up to 3%.
UV index is 2.
Sweet Grass weather today
Sunny and 68°F in Sweet Grass, MT. Today's high is 81°F with a 2% rain chance. Winds are around 12 mph with gusts near 14 mph. Relative humidity is 52%, pressure is 29.96 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Sweet Grass
Sunrise is at 06:14 AM and sunset is at 08:50 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 65°F and a low near 56°F. The maximum rain chance is 46%.