Coggon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coggon, a city in Linn County, Iowa.
Today
80°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Partly sunny. High near 80, with temperatures falling to around 78 in the afternoon. West wind 5 to 10 mph. Chance of precipitation is 40%.
7-day forecast for Coggon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 42% |
| Tonight | 63°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 79% |
| Wednesday | 74°F | Showers And Thunderstorms Likely | 5 mph N | 60% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 29% |
| Thursday | 79°F | Slight Chance Rain Showers then Sunny | 0 to 5 mph NE | 18% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 1% |
| Friday | 82°F | Sunny | 0 to 5 mph SE | 3% |
| Friday Night | 65°F | Mostly Clear | 5 mph S | 10% |
| Saturday | 85°F | Mostly Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 23% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 10 mph S | 23% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 41% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 41% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 10 mph E | 39% |
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 Aug 4, 2026.