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

52°F

Sunny

Sunny. High near 52, with temperatures falling to around 42 in the afternoon. South wind around 2 mph.

7-day forecast for St. Pierre

When	Temp	Forecast	Wind	Precip
This Afternoon	52°F	Sunny	2 mph S	0%
Tonight	30°F	Partly Cloudy	1 mph S	0%
Wednesday	44°F	Partly Sunny then Patchy Fog	0 to 3 mph W	0%
Wednesday Night	29°F	Patchy Fog then Mostly Clear	3 mph S	0%
Thursday	49°F	Sunny	3 to 7 mph SW	2%
Thursday Night	30°F	Mostly Clear	3 to 9 mph SW	3%
Friday	50°F	Sunny	9 to 13 mph SW	8%
Friday Night	34°F	Slight Chance Light Rain then Slight Chance Rain And Snow	9 to 13 mph SW	15%
Saturday	49°F	Sunny	3 to 13 mph WSW	1%
Saturday Night	35°F	Partly Cloudy	3 to 8 mph SSW	0%
Sunday	58°F	Mostly Sunny	10 mph SSW	3%
Sunday Night	36°F	Mostly Cloudy	6 to 9 mph WSW	2%
Monday	52°F	Mostly Sunny	6 mph SW	2%
Monday Night	36°F	Mostly Cloudy	3 to 7 mph S	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

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 Nov 4, 2026.