Coggon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coggon, a city in Linn County, Iowa.
Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4am, then patchy fog and occasional showers and thunderstorms. Cloudy, with a low around 66. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Coggon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 84% |
| Saturday | 79°F | Patchy Fog | 5 to 10 mph S | 83% |
| Saturday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph NW | 70% |
| Sunday | 67°F | Chance Rain Showers | 10 to 15 mph NE | 46% |
| Sunday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Monday | 63°F | Chance Rain Showers | 15 mph NE | 40% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Tuesday | 62°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 32% |
| Tuesday Night | 46°F | Mostly Clear | 5 to 10 mph NE | 6% |
| Wednesday | 66°F | Sunny | 5 to 10 mph NE | 0% |
| Wednesday Night | 50°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 7% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph E | 5% |
| Friday | 70°F | Mostly Sunny | 5 mph E | 6% |
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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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 Sep 19, 2026.