Helena Flats, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helena Flats, a community in Flathead County, Montana.
Tonight
25°F
Mostly Cloudy
Mostly cloudy, with a low around 25. Wind around 0 mph.
7-day forecast for Helena Flats
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 25°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 44°F | Mostly Sunny | 2 mph SE | 0% |
| Wednesday Night | 25°F | Partly Cloudy | 0 mph | 1% |
| Thursday | 42°F | Slight Chance Light Rain | 0 to 7 mph S | 18% |
| Thursday Night | 29°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph S | 18% |
| Friday | 47°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 12 mph S | 20% |
| Friday Night | 32°F | Slight Chance Light Rain | 1 to 8 mph S | 20% |
| Saturday | 51°F | Partly Sunny | 1 to 5 mph SSE | 7% |
| Saturday Night | 32°F | Mostly Cloudy then Chance Light Rain | 1 mph SSE | 31% |
| Sunday | 53°F | Chance Light Rain | 1 to 14 mph SSW | 31% |
| Sunday Night | 32°F | Chance Light Rain | 1 to 8 mph SSW | 29% |
| Monday | 50°F | Partly Sunny then Slight Chance Light Rain | 2 mph SSE | 20% |
| Monday Night | 32°F | Slight Chance Light Rain | 1 mph SSE | 23% |
| Tuesday | 51°F | Slight Chance Light Rain | 0 to 7 mph S | 23% |
Forecast source: National Weather Service (api.weather.gov) for Helena Flats (48.279, -114.236). Updated through the day.
Growing snapshot for Helena Flats
Last spring frost
May 16
First fall frost
Sep 25
Growing season
129 days
Hardiness zone
5a
More local growing data for Helena Flats: nearby ZIP 59912 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
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West Glacier
Whitefish
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Climate data from the nearest NOAA station, Whitefish, Mt (9 mi from Helena Flats). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.