Oskaloosa, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oskaloosa, a city in Mahaska County, Iowa.
Today
52°F
Cloudy
Cloudy, with a high near 52. West wind around 15 mph, with gusts as high as 24 mph.
7-day forecast for Oskaloosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Cloudy | 15 mph W | 8% |
| Tonight | 45°F | Mostly Cloudy | 12 mph W | 10% |
| Thursday | 55°F | Rain Showers Likely | 8 to 12 mph WNW | 58% |
| Thursday Night | 41°F | Mostly Cloudy | 8 mph NNW | 13% |
| Friday | 50°F | Mostly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NNE | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 3 mph W | 0% |
| Saturday Night | 35°F | Mostly Clear | 1 to 5 mph W | 1% |
| Sunday | 59°F | Sunny | 5 mph W | 1% |
| Sunday Night | 37°F | Clear | 3 mph SW | 0% |
| Monday | 65°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 41°F | Clear | 5 mph W | 0% |
| Tuesday | 65°F | Sunny | 3 mph NW | 0% |
| Tuesday Night | 42°F | Partly Cloudy | 3 mph ENE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Oskaloosa (41.292, -92.641). Updated through the day.
Growing snapshot for Oskaloosa
Last spring frost
Apr 21
First fall frost
Oct 16
Growing season
176 days
Hardiness zone
5b
More local growing data for Oskaloosa: nearby ZIP 52595 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oskaloosa, Ia (2.8 mi from Oskaloosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.