Frost dates for Olathe 3e, KS
At Olathe 3e, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Oct 29, for a typical growing season of 202 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Oct 29First fall frost (median)50% chance of 32°F by this date
- 202 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 5 | Apr 19 | May 2 |
| 32°F | Mar 27 | Apr 10 | Apr 24 |
| 28°F | Mar 13 | Mar 31 | Apr 17 |
| 24°F | Mar 3 | Mar 20 | Apr 6 |
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 2 | Oct 20 | Oct 31 |
| 32°F | Oct 13 | Oct 29 | Nov 12 |
| 28°F | Oct 23 | Nov 6 | Nov 25 |
| 24°F | Oct 31 | 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 | 160 days | 181 days | 200 days |
| 32°F | 181 days | 202 days | 223 days |
| 28°F | 201 days | 223 days | 246 days |
| 24°F | 218 days | 241 days | 266 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 |
|---|---|---|---|
| 66213 | 6b | -5 to 0°F | 5 km |
| 66210 | 6b | -5 to 0°F | 6 km |
| 66219 | 6b | -5 to 0°F | 7 km |
| 66215 | 6b | -5 to 0°F | 8 km |
| 66214 | 6b | -5 to 0°F | 9 km |
| 66251 | 6b | -5 to 0°F | 9 km |
| 66220 | 6b | -5 to 0°F | 9 km |
| 66212 | 6b | -5 to 0°F | 10 km |
| 66211 | 6b | -5 to 0°F | 12 km |
| 66207 | 6b | -5 to 0°F | 13 km |
| 66204 | 6b | -5 to 0°F | 13 km |
| 66216 | 6b | -5 to 0°F | 14 km |
| 66206 | 6b | -5 to 0°F | 15 km |
| 64114 | 6b | -5 to 0°F | 16 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 USC00145972, at 38.8875, -94.7603, elevation 322 m (1,055 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 98.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Olathe Johnson Co Exec Airport (5 km)
- Olathe Johnson Co Airport (13 km)
- Bonner Springs (23 km)
- Hillsdale Lake (27 km)
- Paola (34 km)
- Lawrence Muni Airport (41 km)
- Lawrence (43 km)
- Osawatomie (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.