Heron, MT Weather & Growing Conditions
Today
69°F
Sunny
Sunny, with a high near 69. North wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Sunny | 2 to 7 mph N | 0% |
| Tonight | 52°F | Mostly Clear | 2 to 8 mph W | 0% |
| Wednesday | 74°F | Sunny then Patchy Smoke | 2 to 8 mph SSW | 0% |
| Wednesday Night | 56°F | Patchy Smoke then Clear | 3 to 8 mph SW | 0% |
| Thursday | 78°F | Sunny | 3 to 8 mph SSW | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 9 mph SSW | 0% |
| Friday | 78°F | Sunny | 5 to 12 mph SSW | 0% |
| Friday Night | 60°F | Mostly Clear | 9 to 14 mph SSW | 0% |
| Saturday | 75°F | Sunny | 6 to 12 mph SW | 0% |
| Saturday Night | 59°F | Mostly Clear | 6 to 12 mph SSW | 0% |
| Sunday | 73°F | Sunny | 5 to 9 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 3 to 9 mph S | 0% |
| Monday | 72°F | Sunny | 3 to 7 mph SSW | 0% |
| Monday Night | 56°F | Mostly Clear | 3 to 8 mph SSW | 1% |
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 Aug 4, 2026.