Garnavillo, IA Weather & Growing Conditions
Tonight
51°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 51, with temperatures rising to around 54 overnight. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Chance Rain Showers | 10 mph S | 47% |
| Wednesday | 55°F | Chance Rain Showers | 10 to 16 mph SW | 52% |
| Wednesday Night | 45°F | Rain Showers | 12 to 15 mph SW | 76% |
| Thursday | 51°F | Rain Showers | 13 mph NW | 76% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph N | 16% |
| Friday | 49°F | Partly Sunny | 3 to 10 mph N | 4% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NW | 1% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph W | 1% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 58°F | Sunny | 5 to 9 mph W | 13% |
| Sunday Night | 36°F | Mostly Clear | 6 mph SW | 3% |
| Monday | 60°F | Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph W | 1% |
| Tuesday | 59°F | Sunny | 7 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Garnavillo, IA
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
178 days
Hardiness zone
5a
Explore more for Garnavillo, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Guttenberg L&D 10, Ia (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.