Garnavillo, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garnavillo, a city in Clayton County, Iowa.
Overnight
51°F
Mostly Cloudy
Mostly cloudy. Low around 51, with temperatures rising to around 55 overnight. South wind 8 to 12 mph, with gusts as high as 20 mph.
7-day forecast for Garnavillo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 8 to 12 mph S | 10% |
| Wednesday | 55°F | Chance Rain Showers | 12 to 16 mph SW | 47% |
| Wednesday Night | 45°F | Rain Showers Likely | 12 to 16 mph W | 56% |
| Thursday | 52°F | Rain Showers Likely | 13 mph NW | 55% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 8 to 12 mph N | 15% |
| Friday | 48°F | Mostly Sunny | 5 to 9 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 3 mph NW | 0% |
| Saturday | 51°F | Sunny | 1 to 5 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 6 mph W | 2% |
| Sunday | 56°F | Sunny | 8 mph W | 3% |
| Sunday Night | 35°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 60°F | Sunny | 3 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 3 to 7 mph W | 0% |
| Tuesday | 59°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.