Monona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monona, a city in Allamakee County, Iowa.
Overnight
61°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 61. Southeast wind around 12 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Monona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Showers And Thunderstorms | 12 mph SE | 92% |
| Saturday | 72°F | Showers And Thunderstorms | 9 mph S | 85% |
| Saturday Night | 57°F | Showers And Thunderstorms | 7 to 13 mph N | 75% |
| Sunday | 67°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph NE | 18% |
| Sunday Night | 52°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph NE | 17% |
| Monday | 62°F | Slight Chance Rain Showers | 12 mph NE | 24% |
| Monday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph NE | 19% |
| Tuesday | 61°F | Mostly Sunny | 8 mph NE | 14% |
| Tuesday Night | 43°F | Partly Cloudy | 5 mph NE | 2% |
| Wednesday | 65°F | Sunny | 6 mph NE | 1% |
| Wednesday Night | 48°F | Mostly Clear | 3 mph E | 3% |
| Thursday | 66°F | Mostly Sunny | 3 mph E | 7% |
| Thursday Night | 50°F | Partly Cloudy | 2 mph E | 3% |
| Friday | 69°F | Mostly Sunny | 5 mph E | 5% |
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 Sep 19, 2026.