Last spring frost
Apr 10
Frost Dates for Put-in-Bay, OH
First fall frost
Nov 5
Growing season
209 days
Hardiness zone
7a
In an average year around Put-in-Bay, OH, the last spring frost (32°F) is about Apr 10 and the first fall frost is about Nov 5, giving roughly a 209-day growing season. To be safe most years, wait until Mar 31 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 5 | Apr 21 | Apr 8 |
| Freeze (32°F) | Apr 23 | Apr 10 | Mar 31 |
| Hard (28°F) | Apr 14 | Apr 1 | Mar 16 |
| Severe (24°F) | Apr 3 | Mar 20 | Mar 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 5 | May 1 | Apr 28 | Apr 24 | Apr 21 | Apr 19 | Apr 16 | Apr 13 | Apr 8 |
| 32°F | Apr 23 | Apr 19 | Apr 16 | Apr 13 | Apr 10 | Apr 7 | Apr 4 | Apr 2 | Mar 31 |
| 28°F | Apr 14 | Apr 9 | Apr 5 | Apr 3 | Apr 1 | Mar 30 | Mar 27 | Mar 22 | Mar 16 |
| 24°F | Apr 3 | Mar 31 | Mar 27 | Mar 23 | Mar 20 | Mar 17 | Mar 14 | Mar 10 | Mar 5 |
| 20°F | Mar 26 | Mar 20 | Mar 16 | Mar 14 | Mar 11 | Mar 8 | Mar 5 | Mar 2 | Feb 24 |
| 16°F | Mar 17 | Mar 12 | Mar 8 | Mar 5 | Mar 2 | Feb 28 | Feb 24 | Feb 17 | Feb 7 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 12 | Oct 26 | Nov 9 |
| Freeze (32°F) | Oct 23 | Nov 5 | Nov 20 |
| Hard (28°F) | Nov 3 | Nov 16 | Dec 2 |
| Severe (24°F) | Nov 11 | Nov 27 | Dec 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 12 | Oct 17 | Oct 21 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 4 | Nov 9 |
| 32°F | Oct 23 | Oct 29 | Nov 1 | Nov 3 | Nov 5 | Nov 8 | Nov 11 | Nov 15 | Nov 20 |
| 28°F | Nov 3 | Nov 7 | Nov 10 | Nov 13 | Nov 16 | Nov 20 | Nov 24 | Nov 28 | Dec 2 |
| 24°F | Nov 11 | Nov 15 | Nov 20 | Nov 24 | Nov 27 | Dec 1 | Dec 3 | Dec 8 | Dec 14 |
| 20°F | Nov 19 | Nov 26 | Dec 1 | Dec 4 | Dec 7 | Dec 11 | Dec 16 | Dec 20 | Dec 25 |
| 16°F | Nov 28 | Dec 4 | Dec 9 | Dec 14 | Dec 18 | Dec 22 | Dec 25 | Dec 31 | Jan 6 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Sandusky, Oh, about 15 miles away@if(!empty($station['elevation_ft'])), at 584 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Put-in-Bay, OH?
On average, the last spring frost (32°F) around Put-in-Bay, OH is about Apr 10. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 31.
When is the first frost in the fall?
The first fall frost around Put-in-Bay, OH typically arrives about Nov 5. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 10 on average, or Mar 31 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 209 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 43456 Planting calendar → Ohio frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026