Dayton, MT Weather & Growing Conditions
This Afternoon
44°F
Partly Sunny
Partly sunny, with a high near 44. Southeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Partly Sunny | 1 mph SE | 0% |
| Tonight | 30°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 46°F | Partly Sunny | 2 mph S | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 1 mph SSW | 1% |
| Thursday | 47°F | Partly Sunny | 1 to 6 mph SSW | 11% |
| Thursday Night | 33°F | Mostly Cloudy | 3 to 7 mph SSW | 11% |
| Friday | 48°F | Partly Sunny | 3 to 8 mph SSW | 11% |
| Friday Night | 35°F | Mostly Cloudy | 3 to 12 mph SSW | 11% |
| Saturday | 51°F | Partly Sunny | 3 mph SSW | 1% |
| Saturday Night | 36°F | Mostly Cloudy | 1 mph S | 8% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 1 to 7 mph SSW | 18% |
| Sunday Night | 37°F | Slight Chance Light Rain then Mostly Cloudy | 1 to 6 mph SSW | 18% |
| Monday | 51°F | Mostly Cloudy | 2 mph SSW | 13% |
| Monday Night | 37°F | Slight Chance Light Rain | 2 mph SSW | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dayton, MT
Last spring frost
May 1
First fall frost
Oct 15
Growing season
165 days
Hardiness zone
6a
Explore more for Dayton, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Bigfork 13 S, Mt (12.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.