St. Pierre, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Pierre, a community in Hill County, Montana.
Today
72°F
Sunny
Sunny, with a high near 72. West wind around 7 mph.
7-day forecast for St. Pierre
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Sunny | 7 mph W | 1% |
| Tonight | 49°F | Mostly Clear | 2 to 7 mph SSW | 1% |
| Wednesday | 79°F | Mostly Sunny | 5 to 8 mph WSW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 3 to 7 mph SSE | 0% |
| Thursday | 87°F | Sunny | 6 to 9 mph WSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 5 to 9 mph NE | 0% |
| Friday | 89°F | Sunny | 3 to 9 mph SSW | 0% |
| Friday Night | 58°F | Mostly Clear | 7 mph ESE | 0% |
| Saturday | 87°F | Sunny | 5 to 8 mph WSW | 0% |
| Saturday Night | 57°F | Partly Cloudy | 7 mph ENE | 1% |
| Sunday | 83°F | Mostly Sunny | 5 to 8 mph N | 3% |
| Sunday Night | 55°F | Partly Cloudy | 8 mph NE | 8% |
| Monday | 81°F | Mostly Sunny | 5 to 8 mph NE | 14% |
| Monday Night | 55°F | Partly Cloudy then Slight Chance Rain Showers | 8 mph E | 19% |
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 Aug 4, 2026.