Frost dates for Bucyrus, OH
At Bucyrus, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 27, for a typical growing season of 190 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 190 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 16 | Apr 30 | May 16 |
| 32°F | Apr 5 | Apr 19 | May 6 |
| 28°F | Mar 23 | Apr 7 | Apr 22 |
| 24°F | Mar 12 | Mar 28 | 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 | Oct 2 | Oct 15 | Oct 29 |
| 32°F | Oct 14 | Oct 27 | Nov 10 |
| 28°F | Oct 26 | Nov 6 | Nov 24 |
| 24°F | Nov 3 | Nov 19 | 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 | 147 days | 168 days | 188 days |
| 32°F | 169 days | 190 days | 210 days |
| 28°F | 192 days | 214 days | 235 days |
| 24°F | 214 days | 237 days | 260 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 |
|---|---|---|---|
| 44820 | 6a | -10 to -5°F | 1 km |
| 44881 | 6a | -10 to -5°F | 10 km |
| 44854 | 6a | -10 to -5°F | 17 km |
| 44887 | 6a | -10 to -5°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 USC00331072, at 40.8125, -82.9697, elevation 291 m (955 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 129.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Galion Wtr Wks (17 km)
- Marion Muni Airport (23 km)
- Marion 2 N (26 km)
- Upper Sandusky (26 km)
- Mansfield 5 W (30 km)
- Tiffin (38 km)
- Mansfield Lahm Muni Airport (38 km)
- Ashland 2 SW (52 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.