Frost dates for Pomona Lake, KS
At Pomona Lake, the median last spring frost (32°F) is Apr 8 and the median first fall frost is Oct 31, for a typical growing season of 205 days. For a 90% chance that the last frost has passed, wait until Apr 22. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 8Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Oct 31First fall frost (median)50% chance of 32°F by this date
- 205 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 1 |
| 32°F | Mar 23 | Apr 8 | Apr 22 |
| 28°F | Mar 10 | Mar 30 | Apr 12 |
| 24°F | Feb 28 | Mar 17 | Apr 3 |
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 8 | Oct 22 | Nov 2 |
| 32°F | Oct 18 | Oct 31 | Nov 14 |
| 28°F | Oct 27 | Nov 8 | Nov 26 |
| 24°F | Nov 1 | Nov 18 | Dec 5 |
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 | 166 days | 185 days | 205 days |
| 32°F | 184 days | 205 days | 227 days |
| 28°F | 203 days | 224 days | 249 days |
| 24°F | 220 days | 246 days | 270 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 |
|---|---|---|---|
| 66543 | 6b | -5 to 0°F | 3 km |
| 66528 | 6b | -5 to 0°F | 5 km |
| 66451 | 6b | -5 to 0°F | 10 km |
| 66076 | 6b | -5 to 0°F | 11 km |
| 66524 | 6b | -5 to 0°F | 17 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 USC00146498, at 38.6450, -95.5661, elevation 324 m (1,063 ft).
- Data quality: Representative (10+ years), 26 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
- Melvern Lake (20 km)
- Osage City (21 km)
- Ottawa (25 km)
- Topeka Forbes Field (35 km)
- Clinton Lake (38 km)
- Lawrence (44 km)
- John Redmond Lake (46 km)
- Topeka Muni Airport (48 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.