Frost dates for Gretna 4ne, NE
At Gretna 4ne, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 18, for a typical growing season of 179 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 179 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 | May 1 | May 14 |
| 32°F | Apr 5 | Apr 21 | May 4 |
| 28°F | Mar 27 | Apr 10 | Apr 25 |
| 24°F | Mar 14 | Apr 1 | Apr 19 |
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 8 | Oct 21 |
| 32°F | Oct 4 | Oct 18 | Oct 31 |
| 28°F | Oct 14 | Oct 27 | Nov 10 |
| 24°F | Oct 22 | Nov 4 | Nov 20 |
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 | 143 days | 160 days | 179 days |
| 32°F | 159 days | 179 days | 197 days |
| 28°F | 178 days | 199 days | 218 days |
| 24°F | 194 days | 217 days | 240 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 |
|---|---|---|---|
| 68136 | 6a | -10 to -5°F | 1 km |
| 68138 | 6a | -10 to -5°F | 5 km |
| 68135 | 6a | -10 to -5°F | 5 km |
| 68137 | 6a | -10 to -5°F | 8 km |
| 68028 | 5b | -15 to -10°F | 8 km |
| 68130 | 6a | -10 to -5°F | 8 km |
| 68128 | 6a | -10 to -5°F | 10 km |
| 68144 | 6a | -10 to -5°F | 10 km |
| 68059 | 5b | -15 to -10°F | 11 km |
| 68118 | 6a | -10 to -5°F | 12 km |
| 68010 | 6a | -10 to -5°F | 12 km |
| 68127 | 6a | -10 to -5°F | 13 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 USC00253467, at 41.1586, -96.1922, elevation 378 m (1,240 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 136.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Springfield 7e (19 km)
- Ashland #2 (21 km)
- Valley NWS (23 km)
- Mead 6s (24 km)
- Omaha #1 (26 km)
- Omaha Eppley Airfield (30 km)
- Fort Calhoun 4w (33 km)
- Weeping Water (33 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.