Coggon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coggon, a city in Linn County, Iowa.
Overnight
50°F
Slight Chance Rain Showers
A slight chance of rain showers after 5am. Mostly cloudy. Low around 50, with temperatures rising to around 53 overnight. Southwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Coggon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Slight Chance Rain Showers | 10 mph SW | 15% |
| Wednesday | 51°F | Chance Rain Showers | 10 to 15 mph W | 38% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph W | 29% |
| Thursday | 52°F | Chance Rain Showers | 10 mph NW | 38% |
| Thursday Night | 38°F | Mostly Cloudy | 10 mph N | 11% |
| Friday | 48°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 29°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 3% |
| Sunday Night | 35°F | Clear | 5 mph SW | 0% |
| 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.