Monona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monona, a city in Allamakee County, Iowa.
Overnight
51°F
Slight Chance Rain Showers
A slight 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 18 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Slight Chance Rain Showers | 10 mph S | 16% |
| Wednesday | 54°F | Rain Showers Likely | 10 to 14 mph SW | 59% |
| Wednesday Night | 45°F | Rain Showers Likely | 14 mph W | 59% |
| Thursday | 51°F | Chance Rain Showers | 12 mph NW | 52% |
| Thursday Night | 38°F | Mostly Cloudy | 7 to 12 mph N | 11% |
| Friday | 46°F | Mostly Sunny | 3 to 8 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 49°F | Sunny | 1 to 5 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 55°F | Sunny | 7 mph W | 3% |
| Sunday Night | 36°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 59°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 58°F | Sunny | 3 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Monona (43.050, -91.391). Updated through the day.
Growing snapshot for Monona
Last spring frost
May 1
First fall frost
Oct 3
Growing season
153 days
Hardiness zone
5a
More local growing data for Monona: nearby ZIP 52159 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Postville, Ia (9.7 mi from Monona). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.