Columbus Junction, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Columbus Junction, a city in Louisa County, Iowa.
This Afternoon
69°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 69, with temperatures falling to around 66 in the afternoon. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
7-day forecast for Columbus Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms Likely | 15 mph S | 73% |
| Tonight | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph S | 44% |
| Wednesday | 55°F | Slight Chance Rain Showers | 15 mph SW | 22% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 10% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 33% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 35% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 12% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 54°F | Partly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 36°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 60°F | Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 3% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
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 Nov 4, 2026.