Garnavillo, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garnavillo, a city in Clayton County, Iowa.
Today
80°F
Chance Rain Showers
A chance of rain showers between 9am and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and thunderstorms likely. Mostly cloudy. High near 80, with temperatures falling to around 75 in the afternoon. Southwest wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Garnavillo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Rain Showers | 9 mph SW | 55% |
| Tonight | 61°F | Showers And Thunderstorms | 7 mph NW | 86% |
| Wednesday | 75°F | Chance Showers And Thunderstorms then Partly Sunny | 5 mph NW | 27% |
| Wednesday Night | 55°F | Partly Cloudy | 3 mph NW | 8% |
| Thursday | 79°F | Sunny | 2 mph E | 4% |
| Thursday Night | 59°F | Mostly Clear | 2 mph S | 0% |
| Friday | 82°F | Sunny | 2 to 8 mph S | 5% |
| Friday Night | 64°F | Mostly Clear | 7 mph S | 10% |
| Saturday | 84°F | Mostly Sunny | 8 mph SW | 10% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph S | 31% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 12 mph S | 31% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 6 to 9 mph S | 41% |
| Monday | 84°F | Chance Showers And Thunderstorms | 8 mph S | 41% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 9 mph NE | 36% |
Forecast source: National Weather Service (api.weather.gov) for Garnavillo (42.867, -91.236). Updated through the day.
Growing snapshot for Garnavillo
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
178 days
Hardiness zone
5a
More local growing data for Garnavillo: nearby ZIP 52049 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Clayton
Colesburg
Edgewood
Elkader
Elkport
Farmersburg
Garber
Guttenberg
Luana
Marquette
McGregor
North Buena Vista
Osterdock
St. Olaf
Strawberry Point
Volga
Climate data from the nearest NOAA station, Guttenberg L&D 10, Ia (8.7 mi from Garnavillo). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.