Frost dates for Circleville, OH
At Circleville, the median last spring frost (32°F) is Apr 17 and the median first fall frost is Oct 28, for a typical growing season of 192 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 17Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 192 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 13 | Apr 28 | May 14 |
| 32°F | Apr 2 | Apr 17 | May 4 |
| 28°F | Mar 20 | Apr 4 | Apr 23 |
| 24°F | Mar 7 | Mar 26 | 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 | Oct 4 | Oct 17 | Oct 30 |
| 32°F | Oct 14 | Oct 28 | Nov 9 |
| 28°F | Oct 26 | Nov 7 | Nov 23 |
| 24°F | Nov 4 | Nov 18 | Dec 6 |
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 | 152 days | 171 days | 191 days |
| 32°F | 170 days | 192 days | 211 days |
| 28°F | 194 days | 216 days | 239 days |
| 24°F | 216 days | 240 days | 267 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 |
|---|---|---|---|
| 43113 | 6b | -5 to 0°F | 3 km |
| 43154 | 6a | -10 to -5°F | 11 km |
| 43103 | 6b | -5 to 0°F | 14 km |
| 43164 | 6b | -5 to 0°F | 14 km |
| 43101 | 6b | -5 to 0°F | 24 km |
| 43135 | 6b | -5 to 0°F | 26 km |
| 43117 | 6b | -5 to 0°F | 28 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 USC00331592, at 39.6103, -82.9556, elevation 206 m (675 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 110.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Chillicothe Mound City (27 km)
- Lancaster Fairfield Airport (30 km)
- Lancaster (32 km)
- Columbus-Valley Crossing (33 km)
- Washington Court House (41 km)
- Columbus Port Columbus Intl Airport (43 km)
- Columbus Wcmh (47 km)
- Logan (49 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.