Horizon Colony, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Horizon Colony, a community in Toole County, Montana.
Overnight
41°F
Mostly Clear
Mostly clear. Low around 41, with temperatures rising to around 44 overnight. West northwest wind around 5 mph.
7-day forecast for Horizon Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 73°F | Sunny | 6 mph WSW | 1% |
| Tuesday Night | 48°F | Mostly Clear | 3 to 9 mph WSW | 1% |
| Wednesday | 80°F | Mostly Sunny | 7 to 12 mph WNW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 8 mph WSW | 0% |
| Thursday | 87°F | Sunny | 8 to 13 mph NW | 0% |
| Thursday Night | 53°F | Mostly Clear | 6 to 12 mph NE | 0% |
| Friday | 90°F | Sunny | 5 to 22 mph W | 0% |
| Friday Night | 55°F | Mostly Clear | 15 to 20 mph W | 0% |
| Saturday | 86°F | Sunny | 8 to 14 mph WNW | 0% |
| Saturday Night | 54°F | Partly Cloudy | 12 to 16 mph NNW | 0% |
| Sunday | 81°F | Mostly Sunny | 9 to 15 mph NNW | 1% |
| Sunday Night | 52°F | Partly Cloudy | 13 mph NNE | 12% |
| Monday | 78°F | Mostly Sunny | 8 to 13 mph NE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Horizon Colony (48.717, -112.228). Updated through the day.
Growing snapshot for Horizon Colony
Last spring frost
May 23
First fall frost
Sep 16
Growing season
115 days
Hardiness zone
4a
More local growing data for Horizon Colony: nearby ZIP 59435 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Camrose Colony
Cut Bank
Eagle Creek Colony
Glacier Colony
Hillside Colony
Kevin
Rimrock Colony
Santa Rita
Shelby
Sunburst
Sweet Grass
Climate data from the nearest NOAA station, Shelby, Mt (9.5 mi from Horizon Colony). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.