Monona, IA Weather & Growing Conditions
Today
55°F
Mostly Cloudy
Mostly cloudy. High near 55, with temperatures falling to around 52 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Mostly Cloudy | 15 mph SW | 13% |
| Tonight | 45°F | Rain Showers Likely | 13 to 16 mph W | 57% |
| Thursday | 52°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph NW | 23% |
| Thursday Night | 37°F | Mostly Cloudy | 7 to 12 mph N | 12% |
| Friday | 47°F | Mostly Sunny | 3 to 7 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 7 mph W | 3% |
| Sunday Night | 35°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 60°F | Sunny | 2 to 9 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 2 to 6 mph W | 0% |
| Tuesday | 59°F | Sunny | 3 mph NW | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 1 mph NW | 2% |
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 Nov 4, 2026.