Olney, MT Weather & Growing Conditions
Overnight
29°F
Mostly Cloudy
Mostly cloudy, with a low around 29. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 29°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 42°F | Mostly Sunny | 1 mph E | 0% |
| Wednesday Night | 29°F | Mostly Clear | 2 mph SSE | 1% |
| Thursday | 37°F | Partly Sunny | 5 mph SSW | 11% |
| Thursday Night | 32°F | Mostly Cloudy | 3 mph SSW | 9% |
| Friday | 41°F | Mostly Cloudy then Slight Chance Light Rain | 5 mph SSW | 21% |
| Friday Night | 33°F | Slight Chance Rain And Snow | 2 to 6 mph SSW | 21% |
| Saturday | 45°F | Partly Sunny | 3 mph SSE | 8% |
| Saturday Night | 36°F | Mostly Cloudy then Chance Light Rain | 1 to 7 mph SSE | 45% |
| Sunday | 46°F | Chance Light Rain | 5 to 9 mph SSW | 45% |
| Sunday Night | 34°F | Chance Rain And Snow | 2 to 6 mph SW | 26% |
| Monday | 43°F | Partly Sunny then Slight Chance Rain And Snow | 2 mph S | 20% |
| Monday Night | 35°F | Slight Chance Rain And Snow | 2 mph SSE | 21% |
| Tuesday | 45°F | Slight Chance Rain And Snow | 3 mph SSW | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Olney, MT
Growing season
60 days
Hardiness zone
5a
Explore more for Olney, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Olney, Mt (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.