Darby, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Darby, a town in Ravalli County, Montana.
Overnight
46°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 46. West northwest wind around 2 mph.
7-day forecast for Darby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Areas Of Smoke | 2 mph WNW | 0% |
| Tuesday | 81°F | Areas Of Smoke | 1 to 9 mph NNE | 0% |
| Tuesday Night | 50°F | Areas Of Smoke | 2 to 10 mph WSW | 0% |
| Wednesday | 88°F | Areas Of Smoke | 3 to 7 mph SW | 0% |
| Wednesday Night | 52°F | Areas Of Smoke then Mostly Clear | 3 to 8 mph SW | 0% |
| Thursday | 94°F | Sunny | 3 to 9 mph SW | 0% |
| Thursday Night | 57°F | Mostly Clear | 3 to 10 mph WSW | 0% |
| Friday | 96°F | Sunny | 2 to 12 mph SW | 0% |
| Friday Night | 56°F | Mostly Clear | 6 to 15 mph WSW | 0% |
| Saturday | 93°F | Sunny | 3 to 12 mph SW | 0% |
| Saturday Night | 56°F | Mostly Clear | 3 to 13 mph W | 0% |
| Sunday | 91°F | Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 55°F | Mostly Clear | 2 to 13 mph WNW | 0% |
| Monday | 90°F | Sunny | 2 to 9 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Darby (46.025, -114.180). Updated through the day.
Growing snapshot for Darby
Last spring frost
May 21
First fall frost
Sep 22
Growing season
122 days
Hardiness zone
5b
More local growing data for Darby: nearby ZIP 59840 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hamilton, Mt (6.3 mi from Darby). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.