Weather in Plains, MT
Updated 2026-09-26 07:45 local time · ZIP codes 59859
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
45°27% rain
36°14% rain40°13% rain42°12% rain44°10% rain
47°5% rain
49°1% rain50°1% rain51°0% rain50°0% rain49°0% rain56°10% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 21%).
It feels like 42°F with winds near 5 mph.
51°F, 0% rain chance and 12 mph wind.
Visibility is around 6 mi; gusts may reach 20 mph.
Current temperature is 45°F, wind 5 mph, rain chance up to 21%.
UV index is 0.
Local weather characteristics in Plains
Montana weather varies from relatively dry plains to snowy mountain climates. Cold fronts, strong winds and large day-to-day temperature swings are common.
Plains is part of the West weather region. The forecast point is near 47.46°N latitude and 114.88°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Plains weather today
Overcast and 45°F in Plains, MT. Today's high is 56°F with a 18% rain chance. Winds are around 5 mph with gusts near 14 mph. Relative humidity is 86%, pressure is 30.08 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Plains
Sunrise is at 07:31 AM and sunset is at 07:29 PM. Tomorrow's forecast calls for Overcast with a high near 60°F and a low near 34°F. The maximum rain chance is 11%.