Coggon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coggon, a city in Linn County, Iowa.
Tonight
50°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
7-day forecast for Coggon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Showers And Thunderstorms | 10 mph S | 48% |
| Wednesday | 53°F | Chance Rain Showers | 10 to 15 mph SW | 48% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph SW | 35% |
| Thursday | 51°F | Rain Showers Likely | 10 mph W | 70% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 16% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 4% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 5% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 10% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 61°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Coggon (42.278, -91.530). Updated through the day.
Growing snapshot for Coggon
Last spring frost
May 3
First fall frost
Oct 7
Growing season
156 days
Hardiness zone
5a
More local growing data for Coggon: nearby ZIP 52218 weather · frost dates · planting calendar · Iowa frost dates
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Prairieburg
Robins
Springville
Walker
Climate data from the nearest NOAA station, Coggon, Ia (1.3 mi from Coggon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.