Garnavillo, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garnavillo, a city in Clayton County, Iowa.
Overnight
62°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 62. East wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Garnavillo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Showers And Thunderstorms | 9 mph E | 89% |
| Saturday | 74°F | Showers And Thunderstorms | 9 mph S | 90% |
| Saturday Night | 58°F | Showers And Thunderstorms | 7 to 12 mph N | 89% |
| Sunday | 68°F | Chance Rain Showers then Mostly Cloudy | 15 mph NE | 25% |
| Sunday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph NE | 21% |
| Monday | 64°F | Slight Chance Rain Showers | 13 mph NE | 24% |
| Monday Night | 47°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 12 mph NE | 19% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 7 to 12 mph NE | 19% |
| Tuesday Night | 44°F | Partly Cloudy | 3 to 8 mph NE | 2% |
| Wednesday | 66°F | Mostly Sunny | 7 mph NE | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 7% |
| Thursday Night | 51°F | Partly Cloudy | 3 mph E | 4% |
| Friday | 70°F | Mostly Sunny | 2 to 6 mph E | 5% |
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 Sep 19, 2026.