Olney, MT Weather & Growing Conditions
Today
73°F
Mostly Sunny
Mostly sunny, with a high near 73. North wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Tonight | 50°F | Mostly Clear | 0 to 3 mph W | 0% |
| Wednesday | 79°F | Sunny | 0 to 5 mph SSW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 85°F | Sunny | 0 to 6 mph S | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 6 mph S | 0% |
| Friday | 86°F | Sunny | 1 to 7 mph SSE | 0% |
| Friday Night | 57°F | Mostly Clear | 3 to 10 mph SSW | 0% |
| Saturday | 83°F | Sunny | 3 to 9 mph S | 0% |
| Saturday Night | 56°F | Mostly Clear | 2 to 8 mph W | 0% |
| Sunday | 81°F | Sunny | 2 to 6 mph S | 0% |
| Sunday Night | 54°F | Mostly Clear | 2 to 6 mph NW | 1% |
| Monday | 79°F | Sunny | 1 to 5 mph ESE | 2% |
| Monday Night | 53°F | Mostly Clear | 3 mph NNW | 1% |
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 Aug 4, 2026.