Olathe, KS Weather & Growing Conditions
Today
91°F
Mostly Sunny
Mostly sunny, with a high near 91. Heat index values as high as 95. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Mostly Sunny | 7 mph S | 5% |
| Tonight | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 mph SSE | 15% |
| Wednesday | 87°F | Chance Showers And Thunderstorms | 5 to 8 mph SE | 45% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 5 to 8 mph NNE | 73% |
| Thursday | 86°F | Showers And Thunderstorms Likely then Partly Sunny | 5 mph NE | 73% |
| Thursday Night | 68°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph SE | 39% |
| Friday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 3 to 7 mph S | 39% |
| Friday Night | 71°F | Mostly Clear | 7 mph S | 12% |
| Saturday | 91°F | Sunny | 7 to 10 mph S | 12% |
| Saturday Night | 74°F | Mostly Clear | 12 mph S | 2% |
| Sunday | 92°F | Sunny | 14 mph SSW | 1% |
| Sunday Night | 75°F | Mostly Clear | 14 mph S | 1% |
| Monday | 93°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 8
First fall frost
Oct 29
Growing season
204 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 Exec Ap, Ks (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.