Harman US

Rockport Colony, MT Weather & Growing Conditions

Overnight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. Northwest wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 48°F Mostly Cloudy 5 mph NW 2%
Saturday 64°F Partly Sunny 3 to 7 mph ENE 3%
Saturday Night 44°F Partly Cloudy 3 to 8 mph SSE 0%
Sunday 71°F Sunny 7 mph SSE 0%
Sunday Night 46°F Mostly Clear 3 to 7 mph SSW 0%
Monday 74°F Sunny 6 mph SW 0%
Monday Night 48°F Mostly Clear 6 mph WSW 0%
Tuesday 73°F Sunny 6 mph W 0%
Tuesday Night 49°F Mostly Clear 6 mph W 0%
Wednesday 74°F Mostly Sunny 3 to 7 mph SW 2%
Wednesday Night 49°F Partly Cloudy 6 mph WSW 3%
Thursday 73°F Mostly Sunny 7 mph SW 3%
Thursday Night 49°F Partly Cloudy 3 to 8 mph SSW 10%
Friday 68°F Mostly Sunny 5 to 9 mph WSW 11%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Rockport Colony, MT

Last spring frost
Jun 9
First fall frost
Sep 3
Growing season
86 days
Hardiness zone
4b

Explore more for Rockport Colony, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Blackleaf, Mt (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.