Olathe, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olathe, a city in Johnson County, Kansas.
Tonight
69°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms between 7pm and 10pm, then showers and thunderstorms likely between 10pm and 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. Heat index values as high as 95. West wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Olathe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 9 mph W | 56% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 5 to 9 mph N | 56% |
| Sunday Night | 64°F | Showers And Thunderstorms Likely | 5 to 9 mph N | 49% |
| Monday | 72°F | Chance Showers And Thunderstorms | 6 to 9 mph NNW | 39% |
| Monday Night | 56°F | Mostly Cloudy | 8 mph N | 7% |
| Tuesday | 68°F | Partly Sunny | 8 mph NNE | 3% |
| Tuesday Night | 52°F | Partly Cloudy | 3 to 7 mph NE | 0% |
| Wednesday | 70°F | Mostly Sunny | 5 mph ENE | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph E | 4% |
| Thursday | 75°F | Slight Chance Rain Showers | 5 mph ESE | 24% |
| Thursday Night | 60°F | Chance Rain Showers | 3 mph E | 25% |
| Friday | 78°F | Chance Rain Showers | 5 mph E | 32% |
| Friday Night | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph E | 15% |
| Saturday | 81°F | Slight Chance Rain Showers | 7 mph ESE | 19% |
Forecast source: National Weather Service (api.weather.gov) for Olathe (38.882, -94.820). Updated through the day.
Growing snapshot for Olathe
Last spring frost
Apr 8
First fall frost
Oct 29
Growing season
204 days
Hardiness zone
6b
More local growing data for Olathe: nearby ZIP 66062 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Bonner Springs
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Fairway
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Leawood
Lenexa
Merriam
Mission
Mission Hills
Overland Park
Prairie Village
Roeland Park
Shawnee
Westwood
Climate data from the nearest NOAA station, Olathe Johnson Co Exec Ap, Ks (2.6 mi from Olathe). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.