St. Pierre, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Pierre, a community in Hill County, Montana.
This Afternoon
69°F
Partly Sunny
Partly sunny, with a high near 69. North northeast wind around 9 mph.
7-day forecast for St. Pierre
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Partly Sunny | 9 mph NNE | 3% |
| Tonight | 50°F | Mostly Cloudy | 7 to 10 mph E | 4% |
| Saturday | 64°F | Cloudy | 8 mph E | 7% |
| Saturday Night | 47°F | Mostly Cloudy | 2 to 7 mph ESE | 11% |
| Sunday | 67°F | Mostly Sunny | 3 mph SE | 3% |
| Sunday Night | 47°F | Partly Cloudy | 5 to 8 mph SE | 0% |
| Monday | 72°F | Sunny | 6 mph SSE | 0% |
| Monday Night | 50°F | Mostly Clear | 3 to 8 mph SSE | 0% |
| Tuesday | 73°F | Sunny | 5 mph SW | 0% |
| Tuesday Night | 50°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 73°F | Sunny | 2 to 6 mph SSW | 1% |
| Wednesday Night | 51°F | Mostly Clear | 3 mph SSE | 1% |
| Thursday | 75°F | Sunny | 5 mph S | 2% |
| Thursday Night | 51°F | Partly Cloudy | 3 to 7 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov) for St. Pierre (48.244, -109.816). Updated through the day.
Growing snapshot for St. Pierre
Last spring frost
May 17
First fall frost
Sep 25
Growing season
128 days
Hardiness zone
4a
More local growing data for St. Pierre: nearby ZIP 59521 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Big Sandy, Mt (12.8 mi from St. Pierre). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.