Heron, MT Weather & Growing Conditions
Overnight
31°F
Partly Cloudy
Partly cloudy, with a low around 31. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 31°F | Partly Cloudy | 2 mph E | 2% |
| Wednesday | 43°F | Sunny | 2 mph SW | 1% |
| Wednesday Night | 32°F | Partly Cloudy then Chance Rain And Snow | 2 to 6 mph SSW | 46% |
| Thursday | 36°F | Rain And Snow Likely | 6 mph SSW | 74% |
| Thursday Night | 34°F | Slight Chance Light Rain then Mostly Cloudy | 3 to 7 mph SSW | 19% |
| Friday | 41°F | Chance Rain And Snow | 7 mph SSW | 25% |
| Friday Night | 38°F | Chance Light Rain then Chance Rain And Snow | 5 to 8 mph SSW | 25% |
| Saturday | 46°F | Partly Sunny | 2 to 6 mph SSE | 11% |
| Saturday Night | 41°F | Mostly Cloudy then Light Rain Likely | 2 to 10 mph SE | 63% |
| Sunday | 44°F | Light Rain Likely | 8 to 12 mph SSW | 63% |
| Sunday Night | 37°F | Chance Rain And Snow | 5 to 9 mph SSW | 26% |
| Monday | 43°F | Partly Sunny then Chance Rain And Snow | 5 mph SE | 31% |
| Monday Night | 39°F | Chance Rain And Snow | 2 to 6 mph S | 32% |
| Tuesday | 45°F | Chance Rain And Snow | 2 to 6 mph SSW | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Heron, MT
Last spring frost
May 20
First fall frost
Sep 20
Growing season
119 days
Hardiness zone
6b
Explore more for Heron, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Heron 2 Nw, Mt (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.