Olney, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olney, a community in Flathead County, Montana.
Today
79°F
Mostly Sunny
Mostly sunny, with a high near 79. Southwest wind 0 to 3 mph.
7-day forecast for Olney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Sunny | 0 to 3 mph SW | 0% |
| Tonight | 40°F | Mostly Clear | 2 mph NW | 0% |
| Wednesday | 85°F | Sunny | 0 to 3 mph SW | 0% |
| Wednesday Night | 43°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Thursday | 91°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 47°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Friday | 91°F | Sunny | 0 to 6 mph SW | 0% |
| Friday Night | 48°F | Mostly Clear | 0 to 8 mph WNW | 0% |
| Saturday | 89°F | Sunny | 1 to 7 mph S | 0% |
| Saturday Night | 46°F | Mostly Clear | 0 to 6 mph WNW | 0% |
| Sunday | 86°F | Sunny | 0 to 3 mph SW | 0% |
| Sunday Night | 45°F | Mostly Clear | 0 to 5 mph NW | 1% |
| Monday | 85°F | Sunny | 0 to 3 mph E | 2% |
| Monday Night | 44°F | Mostly Clear | 2 mph NNW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Olney (48.547, -114.573). Updated through the day.
Growing snapshot for Olney
Last spring frost
May 16
First fall frost
Sep 25
Growing season
129 days
Hardiness zone
5a
More local growing data for Olney: nearby ZIP 59937 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Whitefish, Mt (6.7 mi from Olney). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.