Frost dates for Wauseon Water Plant, OH
At Wauseon Water Plant, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 16, for a typical growing season of 170 days. For a 90% chance that the last frost has passed, wait until May 16. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 16Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 170 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 24 | May 9 | May 28 |
| 32°F | Apr 14 | Apr 29 | May 16 |
| 28°F | Apr 2 | Apr 16 | May 3 |
| 24°F | Mar 21 | Apr 5 | 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 20 | Oct 5 | Oct 18 |
| 32°F | Sep 30 | Oct 16 | Oct 31 |
| 28°F | Oct 13 | Oct 29 | Nov 12 |
| 24°F | Oct 26 | Nov 10 | 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 | 124 days | 148 days | 169 days |
| 32°F | 146 days | 170 days | 190 days |
| 28°F | 171 days | 194 days | 216 days |
| 24°F | 196 days | 217 days | 239 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 |
|---|---|---|---|
| 43553 | 6a | -10 to -5°F | 6 km |
| 43567 | 6a | -10 to -5°F | 7 km |
| 43502 | 6a | -10 to -5°F | 13 km |
| 43515 | 6a | -10 to -5°F | 14 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 USC00338822, at 41.5183, -84.1453, elevation 229 m (750 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 137.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Napoleon (14 km)
- Napoleon 1sw (15 km)
- Toledo Express Airport (30 km)
- Defiance Mem Airport (31 km)
- Bryan 2 SE (32 km)
- Defiance (33 km)
- Montpelier (40 km)
- Hoytville 2 NE (46 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.