Columbus Junction, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Columbus Junction, a city in Louisa County, Iowa.
Today
88°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Columbus Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Tonight | 67°F | Showers And Thunderstorms Likely | 5 mph N | 73% |
| Wednesday | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NE | 81% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 5 mph NE | 69% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 46% |
| Thursday Night | 62°F | Mostly Clear | 0 mph | 5% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph SE | 14% |
| Saturday | 87°F | Sunny | 5 mph S | 11% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 11% |
| Sunday | 88°F | Sunny | 10 mph S | 11% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 29% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 29% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
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 Aug 4, 2026.