Harman US

Ronan, MT Weather & Growing Conditions

This Afternoon
72°F
Sunny
Sunny, with a high near 72. West northwest wind around 2 mph.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 72°F Sunny 2 mph WNW 13%
Tonight 45°F Partly Cloudy 2 to 6 mph SE 3%
Sunday 75°F Patchy Fog then Sunny 2 mph NNW 1%
Sunday Night 45°F Mostly Clear 3 mph E 0%
Monday 78°F Sunny 2 mph W 0%
Monday Night 47°F Mostly Clear 3 mph ESE 0%
Tuesday 78°F Sunny 2 mph S 0%
Tuesday Night 48°F Partly Cloudy 3 mph SE 3%
Wednesday 75°F Mostly Sunny 3 mph SSW 2%
Wednesday Night 46°F Partly Cloudy 1 to 5 mph S 8%
Thursday 73°F Mostly Sunny 2 mph SW 1%
Thursday Night 45°F Partly Cloudy 3 mph ENE 9%
Friday 71°F Mostly Sunny 3 mph S 11%
Friday Night 44°F Slight Chance Light Rain 5 mph ESE 17%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Ronan, MT

Last spring frost
May 10
First fall frost
Oct 5
Growing season
147 days
Hardiness zone
6a

Explore more for Ronan, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Polson, Mt (10.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.