Frost dates for Brandenburg, KY
At Brandenburg, 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 186 days. For a 90% chance that the last frost has passed, wait until May 2. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 2Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 186 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 7a (0 to 5°F) · see all zone 7a frost dates
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 15 | Apr 29 | May 13 |
| 32°F | Apr 4 | Apr 19 | May 2 |
| 28°F | Mar 21 | Apr 6 | Apr 23 |
| 24°F | Mar 7 | Mar 27 | Apr 12 |
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 30 | Oct 14 | Oct 26 |
| 32°F | Oct 9 | Oct 24 | Nov 4 |
| 28°F | Oct 22 | Nov 2 | Nov 18 |
| 24°F | Nov 1 | Nov 13 | Nov 30 |
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 | 166 days | 185 days |
| 32°F | 167 days | 186 days | 209 days |
| 28°F | 188 days | 211 days | 231 days |
| 24°F | 209 days | 233 days | 256 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 |
|---|---|---|---|
| 40108 | 7a | 0 to 5°F | 5 km |
| 40117 | 7a | 0 to 5°F | 7 km |
| 40142 | 7a | 0 to 5°F | 10 km |
| 40155 | 7a | 0 to 5°F | 11 km |
| 47135 | 7a | 0 to 5°F | 11 km |
| 47142 | 7a | 0 to 5°F | 14 km |
| 40121 | 7a | 0 to 5°F | 14 km |
| 47110 | 7a | 0 to 5°F | 17 km |
| 40177 | 7a | 0 to 5°F | 18 km |
| 47117 | 7a | 0 to 5°F | 21 km |
| 47160 | 7a | 0 to 5°F | 23 km |
| 40104 | 7a | 0 to 5°F | 24 km |
| 40157 | 7a | 0 to 5°F | 24 km |
| 40161 | 7a | 0 to 5°F | 26 km |
| 47112 | 7a | 0 to 5°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 USC00150955, at 37.9561, -86.1161, elevation 188 m (615 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 109.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Corners (21 km)
- Elizabethtown Wp Cs (37 km)
- Bernheim Forest (40 km)
- Louisville Intl Airport (41 km)
- McDaniels (44 km)
- Louisville WFO (45 km)
- Louisville McAlpine (46 km)
- Louisville Bowman Field (50 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.