Frost dates for Hennessey 4 ESE, OK
At Hennessey 4 ESE, the median last spring frost (32°F) is Apr 14 and the median first fall frost is Oct 30, for a typical growing season of 198 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 14Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 198 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 10 | Apr 23 | May 5 |
| 32°F | Mar 29 | Apr 14 | Apr 27 |
| 28°F | Mar 13 | Apr 2 | Apr 18 |
| 24°F | Feb 28 | Mar 20 | Apr 7 |
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 6 | Oct 21 | Nov 2 |
| 32°F | Oct 17 | Oct 30 | Nov 11 |
| 28°F | Oct 25 | Nov 6 | Nov 22 |
| 24°F | Oct 31 | Nov 14 | Dec 1 |
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 | 162 days | 180 days | 200 days |
| 32°F | 178 days | 198 days | 220 days |
| 28°F | 197 days | 218 days | 242 days |
| 24°F | 213 days | 238 days | 265 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 |
|---|---|---|---|
| 73742 | 7a | 0 to 5°F | 8 km |
| 73720 | 7a | 0 to 5°F | 12 km |
| 73734 | 7a | 0 to 5°F | 12 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 USC00344055, at 36.0942, -97.8350, elevation 358 m (1,174 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 94.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Marshall 3sse Mesonet (21 km)
- Kingfisher (28 km)
- Kingfisher 1w Mesonet (29 km)
- Enid (36 km)
- Breckinridge 3se Mesnt (38 km)
- Lahoma 1wsw Mesonet (41 km)
- Guthrie 4wsw Mesonet (42 km)
- Okeene (43 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.