Oskaloosa, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oskaloosa, a city in Jefferson County, Kansas.
Today
90°F
Mostly Sunny
Mostly sunny, with a high near 90. South wind around 5 mph.
7-day forecast for Oskaloosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Sunny | 5 mph S | 6% |
| Tonight | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph E | 21% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 46% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NE | 71% |
| Thursday | 83°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph NE | 71% |
| Thursday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph SE | 38% |
| Friday | 87°F | Chance Showers And Thunderstorms | 5 mph S | 38% |
| Friday Night | 70°F | Mostly Clear | 5 mph S | 8% |
| Saturday | 90°F | Sunny | 5 to 10 mph S | 7% |
| Saturday Night | 73°F | Mostly Clear | 10 mph S | 1% |
| Sunday | 92°F | Sunny | 10 mph S | 1% |
| Sunday Night | 74°F | Mostly Clear | 10 mph S | 3% |
| Monday | 93°F | Sunny | 10 to 15 mph S | 3% |
| Monday Night | 75°F | Mostly Clear | 10 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov) for Oskaloosa (39.216, -95.315). Updated through the day.
Growing snapshot for Oskaloosa
Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6b
More local growing data for Oskaloosa: nearby ZIP 66066 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Oskaloosa 4 Ne, Ks (4.1 mi from Oskaloosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.