Oskaloosa, IA Weather & Growing Conditions
Tonight
64°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 1am, then showers and thunderstorms. Mostly cloudy. Low around 64, with temperatures rising to around 67 overnight. North wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 8 mph N | 81% |
| Sunday | 68°F | Chance Showers And Thunderstorms then Chance Drizzle | 7 to 13 mph NNE | 48% |
| Sunday Night | 58°F | Rain Showers Likely | 13 mph ENE | 59% |
| Monday | 61°F | Rain Showers | 12 mph NE | 82% |
| Monday Night | 53°F | Rain Showers Likely | 10 mph NE | 65% |
| Tuesday | 61°F | Slight Chance Rain Showers | 9 mph NE | 19% |
| Tuesday Night | 49°F | Partly Cloudy | 3 to 7 mph NE | 5% |
| Wednesday | 64°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph ENE | 0% |
| Thursday | 67°F | Slight Chance Rain Showers | 2 mph ESE | 15% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 2 mph E | 21% |
| Friday | 70°F | Slight Chance Rain Showers | 5 mph E | 21% |
| Friday Night | 58°F | Mostly Cloudy | 3 mph E | 8% |
| Saturday | 70°F | Slight Chance Rain Showers | 6 mph ESE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Oskaloosa, IA
Last spring frost
Apr 21
First fall frost
Oct 16
Growing season
176 days
Hardiness zone
5b
Explore more for Oskaloosa, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Oskaloosa, Ia (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.