Garnavillo, IA Weather & Growing Conditions
Today
80°F
Mostly Cloudy then Scattered Showers And Thunderstorms
Scattered rain showers between 1pm and 4pm, then scattered showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 75 in the afternoon. West wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Cloudy then Scattered Showers And Thunderstorms | 6 to 9 mph W | 44% |
| Tonight | 61°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph NW | 62% |
| Wednesday | 75°F | Chance Showers And Thunderstorms then Partly Sunny | 5 mph NW | 26% |
| 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 7 mph S | 5% |
| Friday Night | 64°F | Mostly Clear | 6 mph S | 10% |
| Saturday | 84°F | Mostly Sunny | 8 mph SW | 10% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 9 mph S | 31% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 12 mph SW | 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). 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 Aug 4, 2026.