Frost dates for Ravenna, NE
At Ravenna, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 3, for a typical growing season of 150 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 3First fall frost (median)50% chance of 32°F by this date
- 150 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 | May 2 | May 14 | May 26 |
| 32°F | Apr 23 | May 4 | May 18 |
| 28°F | Apr 11 | Apr 27 | May 9 |
| 24°F | Apr 2 | Apr 18 | Apr 30 |
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 13 | Sep 27 | Oct 7 |
| 32°F | Sep 22 | Oct 3 | Oct 16 |
| 28°F | Sep 27 | Oct 12 | Oct 25 |
| 24°F | Oct 4 | Oct 22 | Nov 4 |
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 | 118 days | 135 days | 151 days |
| 32°F | 132 days | 150 days | 169 days |
| 28°F | 148 days | 169 days | 190 days |
| 24°F | 166 days | 187 days | 208 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 |
|---|---|---|---|
| 68869 | 5b | -15 to -10°F | 5 km |
| 68844 | 5b | -15 to -10°F | 12 km |
| 68871 | 5b | -15 to -10°F | 13 km |
| 68866 | 5b | -15 to -10°F | 19 km |
| 68820 | 5b | -15 to -10°F | 21 km |
| 68824 | 5b | -15 to -10°F | 26 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 USC00257040, at 41.0319, -98.9214, elevation 624 m (2,046 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 161.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Loup City (28 km)
- Kearney 4 NE (35 km)
- Mason City (38 km)
- Saint Paul (43 km)
- Grand Island Airport (52 km)
- N Loup (53 km)
- Minden (57 km)
- Hastings 4n (62 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.