Monona, IA Weather & Growing Conditions
Today
71°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 71, with temperatures falling to around 68 in the afternoon. South wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Showers And Thunderstorms | 6 mph S | 87% |
| Tonight | 57°F | Showers And Thunderstorms Likely | 6 to 10 mph N | 73% |
| Sunday | 64°F | Chance Rain Showers then Cloudy | 12 mph NE | 35% |
| Sunday Night | 52°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph NE | 16% |
| Monday | 63°F | Slight Chance Rain Showers | 10 mph NE | 23% |
| Monday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph NE | 18% |
| Tuesday | 62°F | Mostly Sunny | 5 to 8 mph NE | 14% |
| Tuesday Night | 43°F | Partly Cloudy | 5 mph NE | 2% |
| Wednesday | 65°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 48°F | Mostly Clear | 2 mph NE | 3% |
| Thursday | 67°F | Mostly Sunny | 3 mph E | 7% |
| Thursday Night | 50°F | Partly Cloudy | 1 mph NE | 3% |
| Friday | 70°F | Mostly Sunny | 3 mph E | 5% |
| Friday Night | 51°F | Partly Cloudy | 2 mph E | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Monona, IA
Last spring frost
May 1
First fall frost
Oct 3
Growing season
153 days
Hardiness zone
5a
Explore more for Monona, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Postville, Ia (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.