Olney, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olney, a community in Flathead County, Montana.
This Afternoon
75°F
Mostly Sunny
Mostly sunny, with a high near 75. Southwest wind around 6 mph.
7-day forecast for Olney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Mostly Sunny | 6 mph SW | 1% |
| Tonight | 43°F | Partly Cloudy | 2 mph NNW | 3% |
| Saturday | 75°F | Patchy Fog then Sunny | 2 mph NE | 1% |
| Saturday Night | 43°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 76°F | Patchy Fog then Sunny | 2 mph S | 0% |
| Sunday Night | 43°F | Mostly Clear | 2 mph W | 0% |
| Monday | 76°F | Sunny | 0 to 3 mph SW | 0% |
| Monday Night | 43°F | Mostly Clear | 2 mph WNW | 0% |
| Tuesday | 74°F | Mostly Sunny | 0 to 3 mph SSE | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 1 mph SSW | 1% |
| Wednesday | 70°F | Sunny | 0 to 5 mph SSW | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 2 mph SW | 2% |
| Thursday | 72°F | Mostly Sunny | 2 mph SSE | 2% |
| Thursday Night | 44°F | Partly Cloudy | 1 mph NNE | 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 Sep 18, 2026.