Columbus, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Columbus, a town in Stillwater County, Montana.
This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 76 in the afternoon. East wind 5 to 8 mph. Chance of precipitation is 50%.
7-day forecast for Columbus
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Chance Showers And Thunderstorms | 5 to 8 mph E | 45% |
| Tonight | 51°F | Chance Showers And Thunderstorms then Patchy Fog | 3 to 9 mph NNW | 95% |
| Saturday | 61°F | Showers And Thunderstorms | 6 to 13 mph NNW | 98% |
| Saturday Night | 48°F | Showers And Thunderstorms | 8 to 13 mph NW | 91% |
| Sunday | 66°F | Rain Showers Likely | 7 mph NW | 62% |
| Sunday Night | 45°F | Mostly Cloudy | 0 to 5 mph NE | 11% |
| Monday | 75°F | Mostly Sunny | 0 to 6 mph SSE | 1% |
| Monday Night | 45°F | Mostly Clear | 2 to 7 mph S | 0% |
| Tuesday | 79°F | Sunny | 3 mph S | 2% |
| Tuesday Night | 48°F | Partly Cloudy | 3 mph S | 4% |
| Wednesday | 80°F | Sunny | 1 to 5 mph WSW | 4% |
| Wednesday Night | 47°F | Mostly Clear | 5 mph SSW | 2% |
| Thursday | 81°F | Sunny | 2 to 7 mph SSW | 1% |
| Thursday Night | 47°F | Mostly Clear | 3 to 7 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Columbus (45.636, -109.249). Updated through the day.
Growing snapshot for Columbus
Last spring frost
May 27
First fall frost
Sep 14
Growing season
108 days
Hardiness zone
5a
More local growing data for Columbus: nearby ZIP 59019 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbus, Mt (1.7 mi from Columbus). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.