Frost dates for Marion 2 N, OH
At Marion 2 N, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 20, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 178 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 21 | May 5 | May 21 |
| 32°F | Apr 11 | Apr 25 | May 11 |
| 28°F | Mar 30 | Apr 14 | May 3 |
| 24°F | Mar 18 | Apr 2 | Apr 19 |
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 24 | Oct 8 | Oct 21 |
| 32°F | Oct 5 | Oct 20 | Nov 2 |
| 28°F | Oct 18 | Nov 1 | Nov 14 |
| 24°F | Oct 29 | Nov 11 | Nov 28 |
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 | 136 days | 157 days | 174 days |
| 32°F | 154 days | 178 days | 198 days |
| 28°F | 177 days | 200 days | 221 days |
| 24°F | 200 days | 223 days | 244 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 |
|---|---|---|---|
| 43302 | 6a | -10 to -5°F | 2 km |
| 43322 | 6a | -10 to -5°F | 11 km |
| 43337 | 6a | -10 to -5°F | 13 km |
| 43341 | 6a | -10 to -5°F | 16 km |
| 43342 | 6a | -10 to -5°F | 17 km |
| 43332 | 6a | -10 to -5°F | 20 km |
| 43066 | 6b | -5 to 0°F | 24 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 USC00334942, at 40.6167, -83.1333, elevation 294 m (965 ft).
- Data quality: Standard (24+ years of data), 26 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
- Marion Muni Airport (6 km)
- Bucyrus (26 km)
- Upper Sandusky (27 km)
- Galion Wtr Wks (30 km)
- Kenton (40 km)
- Mansfield 5 W (47 km)
- Marysville (48 km)
- Centerburg 2 SE (54 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.