Frost dates for Milford, OH
At Milford, the median last spring frost (32°F) is Apr 23 and the median first fall frost is Oct 18, for a typical growing season of 177 days. For a 90% chance that the last frost has passed, wait until May 8. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 23Last spring frost (median)50% chance of 32°F after this date
- May 8Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 177 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 19 | May 2 | May 16 |
| 32°F | Apr 9 | Apr 23 | May 8 |
| 28°F | Mar 31 | Apr 11 | Apr 28 |
| 24°F | Mar 17 | Apr 1 | Apr 14 |
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 29 | Oct 9 | Oct 18 |
| 32°F | Oct 6 | Oct 18 | Oct 28 |
| 28°F | Oct 16 | Oct 27 | Nov 9 |
| 24°F | Oct 24 | Nov 7 | Nov 26 |
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 | 140 days | 159 days | 176 days |
| 32°F | 158 days | 177 days | 193 days |
| 28°F | 177 days | 197 days | 217 days |
| 24°F | 200 days | 221 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 |
|---|---|---|---|
| 45111 | 6b | -5 to 0°F | 2 km |
| 45174 | 6b | -5 to 0°F | 3 km |
| 45147 | 6b | -5 to 0°F | 4 km |
| 45243 | 6b | -5 to 0°F | 4 km |
| 45150 | 6b | -5 to 0°F | 5 km |
| 45140 | 6b | -5 to 0°F | 9 km |
| 45242 | 6b | -5 to 0°F | 9 km |
| 45236 | 6b | -5 to 0°F | 10 km |
| 45249 | 6b | -5 to 0°F | 11 km |
| 45241 | 6b | -5 to 0°F | 14 km |
| 45160 | 6b | -5 to 0°F | 14 km |
| 45122 | 6b | -5 to 0°F | 14 km |
| 45103 | 6b | -5 to 0°F | 16 km |
| 45039 | 6b | -5 to 0°F | 17 km |
| 45158 | 6b | -5 to 0°F | 18 km |
| 45102 | 6b | -5 to 0°F | 20 km |
| 45034 | 6b | -5 to 0°F | 20 km |
| 45162 | 6b | -5 to 0°F | 21 km |
| 45065 | 6b | -5 to 0°F | 22 km |
| 45152 | 6b | -5 to 0°F | 24 km |
| 45176 | 6b | -5 to 0°F | 25 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 USC00335268, at 39.1814, -84.2867, elevation 158 m (520 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 116.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cincinnati Lunken Airport (14 km)
- Hamilton Butler Co Regional Airport (29 km)
- Cheviot (29 km)
- Fairfield (32 km)
- Cheviot 3 W (34 km)
- Cincinnati-Fernbank (36 km)
- Franklin (41 km)
- Chilo Meldahl Locks & Dam (44 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.