Frost dates for Ashtabula Co Airport, OH
At Ashtabula Co Airport, the median last spring frost (32°F) is May 2 and the median first fall frost is Oct 21, for a typical growing season of 171 days. For a 90% chance that the last frost has passed, wait until May 20. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 2Last spring frost (median)50% chance of 32°F after this date
- May 20Safer planting date10% chance of 32°F after this date
- Oct 21First fall frost (median)50% chance of 32°F by this date
- 171 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 28 | May 14 | May 30 |
| 32°F | Apr 18 | May 2 | May 20 |
| 28°F | Apr 5 | Apr 21 | May 6 |
| 24°F | Mar 23 | Apr 6 | Apr 22 |
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 25 | Oct 7 | Oct 24 |
| 32°F | Oct 4 | Oct 21 | Nov 5 |
| 28°F | Oct 18 | Nov 3 | Nov 19 |
| 24°F | Nov 1 | Nov 16 | 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 | 123 days | 145 days | 168 days |
| 32°F | 147 days | 171 days | 195 days |
| 28°F | 174 days | 198 days | 220 days |
| 24°F | 203 days | 225 days | 248 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 |
|---|---|---|---|
| 44047 | 6a | -10 to -5°F | 6 km |
| 44048 | 6b | -5 to 0°F | 9 km |
| 44082 | 6a | -10 to -5°F | 11 km |
| 44004 | 6b | -5 to 0°F | 12 km |
| 44010 | 6a | -10 to -5°F | 13 km |
| 44068 | 6b | -5 to 0°F | 14 km |
| 44041 | 6b | -5 to 0°F | 21 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 USW00004857, at 41.7781, -80.6958, elevation 282 m (924 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 124.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dorset (11 km)
- Chardon (46 km)
- Painesville 4 NW (50 km)
- Kirtland-Holden 2 (53 km)
- Mosquito Creek Lake (54 km)
- Youngstown Regional Airport (58 km)
- Hiram (59 km)
- Warren 3 S (65 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.