Frost dates for Toledo Metcalf Field, OH
At Toledo Metcalf Field, the median last spring frost (32°F) is Apr 20 and the median first fall frost is Oct 27, for a typical growing season of 188 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 20Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 188 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 17 | May 1 | May 16 |
| 32°F | Apr 5 | Apr 20 | May 7 |
| 28°F | Mar 25 | Apr 8 | Apr 25 |
| 24°F | Mar 14 | Mar 29 | Apr 13 |
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 1 | Oct 15 | Oct 28 |
| 32°F | Oct 14 | Oct 27 | Nov 9 |
| 28°F | Oct 26 | Nov 7 | Nov 21 |
| 24°F | Nov 4 | Nov 17 | Dec 5 |
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 | 146 days | 165 days | 185 days |
| 32°F | 167 days | 188 days | 209 days |
| 28°F | 190 days | 211 days | 231 days |
| 24°F | 214 days | 233 days | 256 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 |
|---|---|---|---|
| 43465 | 6b | -5 to 0°F | 2 km |
| 43447 | 6b | -5 to 0°F | 4 km |
| 43619 | 6b | -5 to 0°F | 5 km |
| 43463 | 6b | -5 to 0°F | 6 km |
| 43460 | 6b | -5 to 0°F | 8 km |
| 43408 | 6b | -5 to 0°F | 9 km |
| 43430 | 6b | -5 to 0°F | 9 km |
| 43605 | 6b | -5 to 0°F | 10 km |
| 43551 | 6b | -5 to 0°F | 10 km |
| 43609 | 6b | -5 to 0°F | 11 km |
| 43604 | 6b | -5 to 0°F | 11 km |
| 43443 | 6b | -5 to 0°F | 11 km |
| 43468 | 6b | -5 to 0°F | 12 km |
| 43616 | 6b | -5 to 0°F | 12 km |
| 43620 | 6b | -5 to 0°F | 13 km |
| 43614 | 6b | -5 to 0°F | 13 km |
| 43608 | 6b | -5 to 0°F | 14 km |
| 43445 | 6b | -5 to 0°F | 14 km |
| 43607 | 6b | -5 to 0°F | 14 km |
| 43610 | 6b | -5 to 0°F | 15 km |
| 43469 | 6b | -5 to 0°F | 15 km |
| 43412 | 6b | -5 to 0°F | 15 km |
| 43611 | 6b | -5 to 0°F | 16 km |
| 43606 | 6b | -5 to 0°F | 17 km |
| 43612 | 6b | -5 to 0°F | 18 km |
| 43432 | 6b | -5 to 0°F | 19 km |
| 43613 | 6b | -5 to 0°F | 19 km |
| 43416 | 6b | -5 to 0°F | 20 km |
| 43458 | 6b | -5 to 0°F | 22 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 USW00004848, at 41.5631, -83.4764, elevation 190 m (622 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 118.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bowling Green Wastewater Plant (23 km)
- Toledo Express Airport (27 km)
- Fremont Ag Station (38 km)
- Fremont (39 km)
- Hoytville 2 NE (45 km)
- Wauseon Water Plant (56 km)
- Tiffin (56 km)
- Napoleon (56 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.