Columbus Junction, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Columbus Junction, a city in Louisa County, Iowa.
Overnight
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1am and 4am, then showers and thunderstorms likely between 4am and 5am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.
7-day forecast for Columbus Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 57% |
| Saturday | 85°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 60% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NW | 80% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 68% |
| Monday | 65°F | Rain Showers Likely | 15 mph NE | 63% |
| Monday Night | 54°F | Rain Showers Likely | 10 to 15 mph NE | 59% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 40% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 70°F | Partly Sunny | 0 to 5 mph NE | 9% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Columbus Junction (41.279, -91.364). Updated through the day.
Growing snapshot for Columbus Junction
Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5b
More local growing data for Columbus Junction: nearby ZIP 52738 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbus Junction, Ia (1 mi from Columbus Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.