Olathe, KS Weather & Growing Conditions
Today
92°F
Mostly Sunny
Mostly sunny, with a high near 92. Heat index values as high as 98. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Mostly Sunny | 7 mph S | 6% |
| Tonight | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 mph SSE | 18% |
| Wednesday | 87°F | Chance Showers And Thunderstorms | 5 to 8 mph ESE | 45% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 7 mph NNE | 72% |
| Thursday | 86°F | Showers And Thunderstorms Likely then Partly Sunny | 5 mph ENE | 72% |
| Thursday Night | 68°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph SE | 41% |
| Friday | 89°F | Chance Showers And Thunderstorms | 6 mph S | 41% |
| Friday Night | 71°F | Mostly Clear | 6 mph S | 13% |
| Saturday | 91°F | Sunny | 6 to 10 mph S | 13% |
| Saturday Night | 75°F | Mostly Clear | 10 mph S | 2% |
| Sunday | 93°F | Sunny | 14 mph SSW | 1% |
| Sunday Night | 75°F | Mostly Clear | 13 mph S | 1% |
| Monday | 94°F | Sunny | 15 mph SSW | 1% |
| Monday Night | 76°F | Mostly Clear | 14 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Olathe, KS
Last spring frost
Apr 13
First fall frost
Oct 24
Growing season
193 days
Hardiness zone
6b
Explore more for Olathe, KS: full frost dates · planting calendar · Kansas frost dates
Climate data from the nearest NOAA station, Olathe Johnson Co Ap, Ks (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.