Frost dates for Lawrence Muni Airport, KS
At Lawrence Muni Airport, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 17, for a typical growing season of 177 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 177 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 16 | Apr 30 | May 13 |
| 32°F | Apr 5 | Apr 21 | May 6 |
| 28°F | Mar 25 | Apr 10 | Apr 27 |
| 24°F | Mar 13 | Mar 31 | Apr 16 |
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 | Sep 20 | Oct 6 | Oct 21 |
| 32°F | Sep 29 | Oct 17 | Oct 31 |
| 28°F | Oct 11 | Oct 27 | Nov 8 |
| 24°F | Oct 22 | Nov 3 | Nov 19 |
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 | 138 days | 158 days | 178 days |
| 32°F | 154 days | 177 days | 200 days |
| 28°F | 174 days | 198 days | 220 days |
| 24°F | 195 days | 219 days | 244 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 |
|---|---|---|---|
| 66044 | 6b | -5 to 0°F | 3 km |
| 66086 | 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 USW00003997, at 39.0083, -95.2117, elevation 254 m (832 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 123.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lawrence (7 km)
- Clinton Lake (13 km)
- Perry Lake (21 km)
- Oskaloosa 4 NE (26 km)
- Bonner Springs (28 km)
- Olathe Johnson Co Airport (34 km)
- Topeka Muni Airport (36 km)
- Topeka - NWS (37 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.