Rockport Colony, MT Weather & Growing Conditions
Tonight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Cloudy | 5 mph N | 2% |
| Saturday | 64°F | Partly Sunny | 3 to 7 mph ENE | 3% |
| Saturday Night | 47°F | Partly Cloudy | 3 to 8 mph SSE | 0% |
| Sunday | 71°F | Sunny | 6 mph SSE | 0% |
| Sunday Night | 47°F | Mostly Clear | 3 to 8 mph S | 0% |
| Monday | 74°F | Sunny | 5 mph SW | 0% |
| Monday Night | 50°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 71°F | Sunny | 6 mph WSW | 0% |
| Tuesday Night | 49°F | Mostly Clear | 6 mph SW | 1% |
| Wednesday | 72°F | Sunny | 3 to 7 mph WSW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 3 to 7 mph WSW | 2% |
| Thursday | 73°F | Mostly Sunny | 3 to 7 mph SSW | 2% |
| Thursday Night | 50°F | Partly Cloudy | 7 mph SSW | 1% |
| Friday | 72°F | Mostly Sunny | 5 to 8 mph SSW | 4% |
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.