Frost dates for Winona, KS
At Winona, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 17, for a typical growing season of 172 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 172 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 26 | May 7 | May 20 |
| 32°F | Apr 14 | Apr 29 | May 11 |
| 28°F | Mar 31 | Apr 17 | May 2 |
| 24°F | Mar 14 | Apr 5 | Apr 21 |
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 26 | Oct 9 | Oct 21 |
| 32°F | Oct 3 | Oct 17 | Oct 28 |
| 28°F | Oct 13 | Oct 25 | Nov 7 |
| 24°F | Oct 21 | Nov 2 | Nov 18 |
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 | 136 days | 154 days | 171 days |
| 32°F | 153 days | 172 days | 189 days |
| 28°F | 170 days | 190 days | 210 days |
| 24°F | 189 days | 211 days | 234 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 67747 | 6a | -10 to -5°F | 16 km |
| 67764 | 6a | -10 to -5°F | 22 km |
| 67761 | 6a | -10 to -5°F | 27 km |
| 67748 | 6a | -10 to -5°F | 33 km |
| 67732 | 6a | -10 to -5°F | 36 km |
| 67743 | 6a | -10 to -5°F | 37 km |
| 67733 | 6a | -10 to -5°F | 38 km |
| 67701 | 6a | -10 to -5°F | 41 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 USC00148988, at 39.0589, -101.2439, elevation 1013 m (3,323 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 145.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Russell Springs 3n (13 km)
- Oakley 4w (27 km)
- Oakley 19 SSW (32 km)
- Wallace (34 km)
- Brewster 4w (38 km)
- Colby 1sw (40 km)
- Sharon Springs (47 km)
- Goodland (52 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.