Osage, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Osage, a city in Mitchell County, Iowa.
Overnight
62°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy, with a low around 62. Southeast wind around 12 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Osage
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Showers And Thunderstorms Likely | 12 mph SE | 73% |
| Saturday | 71°F | Chance Showers And Thunderstorms | 9 mph SW | 54% |
| Saturday Night | 56°F | Slight Chance Showers And Thunderstorms | 13 mph N | 23% |
| Sunday | 66°F | Mostly Cloudy | 13 to 16 mph NE | 10% |
| Sunday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph NE | 23% |
| Monday | 61°F | Chance Rain Showers | 13 mph NE | 29% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 10 mph NE | 23% |
| Tuesday | 60°F | Mostly Sunny | 9 mph E | 10% |
| Tuesday Night | 42°F | Mostly Clear | 6 mph E | 1% |
| Wednesday | 64°F | Sunny | 6 mph E | 1% |
| Wednesday Night | 47°F | Mostly Clear | 5 mph E | 5% |
| Thursday | 65°F | Slight Chance Rain Showers | 5 mph SE | 15% |
| Thursday Night | 50°F | Partly Cloudy | 3 mph E | 4% |
| Friday | 68°F | Mostly Sunny | 2 to 6 mph SE | 4% |
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 Sep 19, 2026.