Frost dates for Chilo Meldahl Locks & Dam, OH
At Chilo Meldahl Locks & Dam, the median last spring frost (32°F) is Apr 16 and the median first fall frost is Oct 31, for a typical growing season of 196 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 16Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 31First fall frost (median)50% chance of 32°F by this date
- 196 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 14 | Apr 28 | May 14 |
| 32°F | Apr 2 | Apr 16 | May 4 |
| 28°F | Mar 19 | Apr 3 | Apr 20 |
| 24°F | Mar 6 | Mar 23 | 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 5 | Oct 19 | Nov 1 |
| 32°F | Oct 17 | Oct 31 | Nov 12 |
| 28°F | Oct 27 | Nov 9 | Nov 24 |
| 24°F | Nov 3 | Nov 19 | Dec 8 |
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 | 154 days | 174 days | 194 days |
| 32°F | 175 days | 196 days | 215 days |
| 28°F | 197 days | 218 days | 243 days |
| 24°F | 218 days | 243 days | 268 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 |
|---|---|---|---|
| 45112 | 6b | -5 to 0°F | 3 km |
| 45156 | 7a | 0 to 5°F | 4 km |
| 41043 | 6b | -5 to 0°F | 5 km |
| 45153 | 6b | -5 to 0°F | 7 km |
| 45120 | 6b | -5 to 0°F | 8 km |
| 41006 | 6b | -5 to 0°F | 15 km |
| 41007 | 6b | -5 to 0°F | 16 km |
| 45157 | 6b | -5 to 0°F | 18 km |
| 45106 | 6b | -5 to 0°F | 19 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 USC00331536, at 38.7975, -84.1730, elevation 146 m (480 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 104.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ripley Exp. Farm (33 km)
- Cincinnati Lunken Airport (40 km)
- Milford (44 km)
- Cheviot (56 km)
- Cincinnati-Fernbank (58 km)
- Cheviot 3 W (59 km)
- Hillsboro (69 km)
- Hamilton Butler Co Regional Airport (70 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.