Frost dates for Bowling Green 21 NNE, KY
At Bowling Green 21 NNE, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Oct 31, for a typical growing season of 209 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Oct 31First fall frost (median)50% chance of 32°F by this date
- 209 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 3 | Apr 18 | May 7 |
| 32°F | Mar 19 | Apr 4 | Apr 24 |
| 28°F | Mar 3 | Mar 24 | Apr 9 |
| 24°F | Feb 20 | Mar 12 | Mar 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 | Oct 9 | Oct 22 | Nov 2 |
| 32°F | Oct 18 | Oct 31 | Nov 15 |
| 28°F | Oct 30 | Nov 11 | Dec 1 |
| 24°F | Nov 6 | Nov 25 | Dec 14 |
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 | 186 days | 207 days |
| 32°F | 186 days | 209 days | 230 days |
| 28°F | 212 days | 232 days | 258 days |
| 24°F | 230 days | 256 days | 283 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 |
|---|---|---|---|
| 42259 | 7a | 0 to 5°F | 6 km |
| 42210 | 7a | 0 to 5°F | 8 km |
| 42729 | 7a | 0 to 5°F | 14 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 USW00063849, at 37.2503, -86.2325, elevation 241 m (790 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 75.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Nolin River Lake (4 km)
- Mammoth Cave (15 km)
- Millerstown 4e (28 km)
- Leitchfield 2 N (29 km)
- Bowling Green Warren Co Airport (36 km)
- Glasgow (40 km)
- Barren River Lake (40 km)
- Rough River Lake (47 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.