Frost dates for Hillsdale Lake, KS
At Hillsdale Lake, the median last spring frost (32°F) is Apr 9 and the median first fall frost is Oct 31, 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 9Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Oct 31First 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 6 | Apr 19 | May 3 |
| 32°F | Mar 27 | Apr 9 | Apr 23 |
| 28°F | Mar 16 | Apr 1 | Apr 13 |
| 24°F | Mar 4 | Mar 22 | Apr 5 |
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 7 | Oct 21 | Nov 1 |
| 32°F | Oct 17 | Oct 31 | Nov 13 |
| 28°F | Oct 27 | Nov 8 | Nov 23 |
| 24°F | Nov 2 | Nov 16 | Dec 2 |
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 | 163 days | 183 days | 202 days |
| 32°F | 183 days | 204 days | 221 days |
| 28°F | 202 days | 221 days | 241 days |
| 24°F | 218 days | 239 days | 261 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 |
|---|---|---|---|
| 66083 | 6b | -5 to 0°F | 9 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 USC00143686, at 38.6644, -94.8900, elevation 308 m (1,010 ft).
- Data quality: Estimated from nearby stations (2+ years), 27 years of freeze data.
- Average days per year at or below 32°F: 110.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Paola (8 km)
- Olathe Johnson Co Airport (19 km)
- Osawatomie (19 km)
- Olathe Johnson Co Exec Airport (24 km)
- Olathe 3e (27 km)
- Ottawa (34 km)
- Bonner Springs (44 km)
- Lawrence (45 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.