Frost dates for Barbourville, KY
At Barbourville, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 24, for a typical growing season of 187 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 187 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 17 | Apr 30 | May 15 |
| 32°F | Apr 4 | Apr 19 | May 6 |
| 28°F | Mar 22 | Apr 6 | Apr 23 |
| 24°F | Mar 6 | Mar 26 | Apr 9 |
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 3 | Oct 15 | Oct 27 |
| 32°F | Oct 11 | Oct 24 | Nov 3 |
| 28°F | Oct 20 | Nov 1 | Nov 15 |
| 24°F | Nov 1 | Nov 11 | Nov 28 |
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 | 147 days | 168 days | 187 days |
| 32°F | 165 days | 187 days | 207 days |
| 28°F | 187 days | 210 days | 232 days |
| 24°F | 212 days | 231 days | 259 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 |
|---|---|---|---|
| 40906 | 7a | 0 to 5°F | 1 km |
| 40949 | 7a | 0 to 5°F | 2 km |
| 40923 | 7a | 0 to 5°F | 5 km |
| 40915 | 7a | 0 to 5°F | 6 km |
| 40943 | 7a | 0 to 5°F | 9 km |
| 40953 | 7a | 0 to 5°F | 9 km |
| 40946 | 7a | 0 to 5°F | 10 km |
| 40734 | 7a | 0 to 5°F | 10 km |
| 40921 | 7a | 0 to 5°F | 10 km |
| 40903 | 7a | 0 to 5°F | 11 km |
| 40771 | 7a | 0 to 5°F | 14 km |
| 40935 | 7a | 0 to 5°F | 14 km |
| 40995 | 7a | 0 to 5°F | 15 km |
| 40939 | 7a | 0 to 5°F | 16 km |
| 40982 | 7a | 0 to 5°F | 18 km |
| 40997 | 7a | 0 to 5°F | 20 km |
| 40977 | 7a | 0 to 5°F | 22 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 USC00150381, at 36.8825, -83.8819, elevation 302 m (990 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 110.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- London Corbin Airport (29 km)
- Williamsburg (29 km)
- Manchester 4 W (30 km)
- Oneida (47 km)
- Baxter (49 km)
- Booneville 12sw (54 km)
- Stearns 2s (58 km)
- Buckhorn Lake (63 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.