Thompson Falls, MT Weather & Growing Conditions
Today
66°F
Patchy Smoke
Patchy smoke before 1pm. Sunny, with a high near 66. South southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Patchy Smoke | 6 mph SSW | 0% |
| Tonight | 50°F | Mostly Clear | 3 to 8 mph NW | 0% |
| Wednesday | 71°F | Sunny then Patchy Smoke | 6 mph WSW | 0% |
| Wednesday Night | 53°F | Patchy Smoke then Mostly Clear | 5 to 9 mph W | 0% |
| Thursday | 76°F | Sunny | 3 to 7 mph SW | 0% |
| Thursday Night | 58°F | Mostly Clear | 5 to 12 mph WSW | 0% |
| Friday | 76°F | Sunny | 5 to 15 mph SW | 0% |
| Friday Night | 57°F | Mostly Clear | 9 to 17 mph SW | 0% |
| Saturday | 73°F | Sunny | 6 to 15 mph WSW | 0% |
| Saturday Night | 56°F | Mostly Clear | 6 to 14 mph WSW | 0% |
| Sunday | 71°F | Sunny | 5 to 9 mph SW | 0% |
| Sunday Night | 54°F | Mostly Clear | 5 to 12 mph W | 0% |
| Monday | 70°F | Sunny | 6 mph WSW | 0% |
| Monday Night | 53°F | Mostly Clear | 6 to 9 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Thompson Falls, MT
Last spring frost
May 7
First fall frost
Oct 4
Growing season
150 days
Hardiness zone
6a
Explore more for Thompson Falls, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Thompson Falls Ph, Mt (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.