Frost dates for Hamilton Butler Co Regional Airport, OH
At Hamilton Butler Co Regional Airport, the median last spring frost (32°F) is Apr 22 and the median first fall frost is Oct 18, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 10. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 22Last spring frost (median)50% chance of 32°F after this date
- May 10Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 178 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 18 | May 2 | May 19 |
| 32°F | Apr 6 | Apr 22 | May 10 |
| 28°F | Mar 26 | Apr 8 | Apr 28 |
| 24°F | Mar 12 | Mar 29 | Apr 11 |
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 25 | Oct 7 | Oct 20 |
| 32°F | Oct 5 | Oct 18 | Oct 29 |
| 28°F | Oct 15 | Oct 27 | Nov 8 |
| 24°F | Oct 25 | Nov 5 | Nov 21 |
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 | 138 days | 159 days | 177 days |
| 32°F | 157 days | 178 days | 198 days |
| 28°F | 178 days | 200 days | 221 days |
| 24°F | 203 days | 223 days | 243 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 |
|---|---|---|---|
| 45015 | 6b | -5 to 0°F | 3 km |
| 45011 | 6b | -5 to 0°F | 7 km |
| 45240 | 6b | -5 to 0°F | 9 km |
| 45246 | 6b | -5 to 0°F | 10 km |
| 45069 | 6b | -5 to 0°F | 10 km |
| 45055 | 6b | -5 to 0°F | 10 km |
| 45062 | 6b | -5 to 0°F | 14 km |
| 45067 | 6b | -5 to 0°F | 15 km |
| 45040 | 6b | -5 to 0°F | 18 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 USW00053855, at 39.3644, -84.5247, elevation 193 m (634 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 115.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Fairfield (6 km)
- Cheviot (25 km)
- Cheviot 3 W (27 km)
- Franklin (27 km)
- Milford (29 km)
- Cincinnati Lunken Airport (30 km)
- Cincinnati-Fernbank (31 km)
- Dayton Wright Bros Airport (36 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.