Frost dates for Olathe Johnson Co Exec Airport, KS
At Olathe Johnson Co Exec Airport, the median last spring frost (32°F) is Apr 8 and the median first fall frost is Oct 29, for a typical growing season of 204 days. For a 90% chance that the last frost has passed, wait until Apr 23. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 8Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Oct 29First fall frost (median)50% chance of 32°F by this date
- 204 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 4 | Apr 18 | May 3 |
| 32°F | Mar 23 | Apr 8 | Apr 23 |
| 28°F | Mar 11 | Mar 30 | Apr 13 |
| 24°F | Mar 1 | Mar 18 | Apr 4 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 5 | Oct 19 | Oct 31 |
| 32°F | Oct 15 | Oct 29 | Nov 11 |
| 28°F | Oct 25 | Nov 6 | Nov 22 |
| 24°F | Nov 2 | Nov 15 | Dec 3 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 161 days | 182 days | 201 days |
| 32°F | 184 days | 204 days | 223 days |
| 28°F | 203 days | 224 days | 246 days |
| 24°F | 221 days | 244 days | 268 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 66221 | 6b | -5 to 0°F | 2 km |
| 66062 | 6b | -5 to 0°F | 4 km |
| 66223 | 6b | -5 to 0°F | 6 km |
| 66085 | 6b | -5 to 0°F | 9 km |
| 66224 | 6b | -5 to 0°F | 10 km |
| 66209 | 6b | -5 to 0°F | 11 km |
| 64145 | 6b | -5 to 0°F | 13 km |
| 66013 | 6b | -5 to 0°F | 14 km |
| 64146 | 6b | -5 to 0°F | 15 km |
| 64147 | 6b | -5 to 0°F | 16 km |
| 64012 | 6b | -5 to 0°F | 18 km |
| 64734 | 6b | -5 to 0°F | 27 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00003967, at 38.8500, -94.7392, elevation 326 m (1,070 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 101.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Olathe 3e (5 km)
- Olathe Johnson Co Airport (13 km)
- Hillsdale Lake (24 km)
- Bonner Springs (27 km)
- Paola (31 km)
- Osawatomie (43 km)
- Lawrence Muni Airport (45 km)
- Lawrence (46 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.