Heron, MT Weather & Growing Conditions
This Afternoon
63°F
Sunny
Sunny, with a high near 63. West northwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Sunny | 7 mph WNW | 0% |
| Tonight | 47°F | Partly Cloudy | 1 to 6 mph WNW | 1% |
| Saturday | 66°F | Sunny | 1 to 5 mph NNE | 2% |
| Saturday Night | 48°F | Mostly Clear | 3 mph SSW | 2% |
| Sunday | 66°F | Sunny | 3 mph S | 0% |
| Sunday Night | 50°F | Clear | 5 mph SSW | 0% |
| Monday | 67°F | Sunny | 2 to 7 mph SSW | 0% |
| Monday Night | 50°F | Mostly Clear | 5 mph SSW | 0% |
| Tuesday | 65°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph SSW | 0% |
| Wednesday | 60°F | Sunny | 5 to 8 mph SSW | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph SSW | 0% |
| Thursday | 65°F | Mostly Sunny | 5 mph SE | 1% |
| Thursday Night | 50°F | Partly Cloudy | 2 to 7 mph SSE | 4% |
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 Sep 19, 2026.