Frost dates for Hebron, NE
At Hebron, the median last spring frost (32°F) is Apr 24 and the median first fall frost is Oct 15, for a typical growing season of 172 days. For a 90% chance that the last frost has passed, wait until May 5. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 24Last spring frost (median)50% chance of 32°F after this date
- May 5Safer planting date10% chance of 32°F after this date
- Oct 15First 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 20 | May 2 | May 14 |
| 32°F | Apr 9 | Apr 24 | May 5 |
| 28°F | Mar 30 | Apr 13 | Apr 27 |
| 24°F | Mar 18 | Apr 4 | 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 21 | Oct 5 | Oct 18 |
| 32°F | Sep 29 | Oct 15 | Oct 26 |
| 28°F | Oct 6 | Oct 23 | Nov 4 |
| 24°F | Oct 17 | Nov 1 | Nov 15 |
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 | 190 days |
| 28°F | 172 days | 191 days | 212 days |
| 24°F | 187 days | 209 days | 231 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 |
|---|---|---|---|
| 68370 | 6a | -10 to -5°F | 4 km |
| 68315 | 6a | -10 to -5°F | 9 km |
| 68340 | 6a | -10 to -5°F | 14 km |
| 68326 | 6a | -10 to -5°F | 14 km |
| 68362 | 6a | -10 to -5°F | 15 km |
| 68375 | 6a | -10 to -5°F | 17 km |
| 68322 | 6a | -10 to -5°F | 18 km |
| 68303 | 6a | -10 to -5°F | 18 km |
| 68327 | 6a | -10 to -5°F | 18 km |
| 68325 | 6a | -10 to -5°F | 23 km |
| 68335 | 6a | -10 to -5°F | 23 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 USC00253735, at 40.1750, -97.5903, elevation 451 m (1,480 ft).
- Data quality: Standard (24+ years of data), 25 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
- Fairbury 5s (38 km)
- Geneva (40 km)
- Superior (44 km)
- Fairmont (52 km)
- Clay Center (55 km)
- Friend 3e (62 km)
- Beatrice 1n (73 km)
- York (77 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.