Osage, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Osage, a city in Mitchell County, Iowa.
This Afternoon
48°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 48, with temperatures falling to around 46 in the afternoon. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Osage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Chance Rain Showers | 15 mph W | 35% |
| Tonight | 42°F | Rain Showers | 14 mph W | 89% |
| Thursday | 48°F | Chance Rain Showers then Cloudy | 16 mph N | 40% |
| Thursday Night | 32°F | Mostly Cloudy | 8 to 14 mph N | 8% |
| Friday | 45°F | Mostly Sunny | 6 to 10 mph N | 0% |
| Friday Night | 25°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 50°F | Mostly Sunny | 3 to 9 mph SW | 1% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 56°F | Sunny | 6 mph W | 1% |
| Sunday Night | 34°F | Clear | 6 mph SW | 0% |
| Monday | 62°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 3 to 7 mph W | 0% |
| Tuesday | 58°F | Mostly Sunny | 5 mph NW | 1% |
| Tuesday Night | 37°F | Partly Cloudy | 5 mph N | 1% |
Forecast source: National Weather Service (api.weather.gov) for Osage (43.283, -92.811). Updated through the day.
Growing snapshot for Osage
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
163 days
Hardiness zone
5a
More local growing data for Osage: nearby ZIP 50461 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Osage, Ia (1.9 mi from Osage). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.