Windsor, OH frost dates
Last spring frostMay 5median date
First fall frostOct 18median date
Growing season166 daysfrost-free
Hardiness zone6aZone 6a
How Windsor compares
- In 8 years out of 10, the last spring frost in Windsor falls between April 22 and May 21, a 29-day window. The first fall frost falls between October 2 and November 1.
- The median last frost is 11 days later than the Ohio median of Apr 24.
- Its 166-day growing season is longer than 8% of the 1,063 Ohio places with a regular frost season (state median 180 days).
- The last frost is 6 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 142 nights a year at or below 32°F.
- Compared with Cleveland, OH, 57 km away, the last frost here is 27 days later than there and the growing season is 52 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 22 |
| 50% (median) | May 5 |
| 10% (safe for tender plants) | May 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 2 |
| 50% (median) | October 18 |
| 90% (late) | November 1 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Windsor, OH
Windsor, OH frost dates — last frost May 5, first frost Oct 18, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 10 to Feb 24Transplant outside: Apr 7 to Apr 21
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Mar 10 to Mar 24Transplant outside: May 12 to May 26
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 7 to May 12Plant for fall: Aug 23 to Sep 20
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 7 to Apr 21Sow outdoors: Apr 7 to Apr 21Plant for fall: Aug 9 to Aug 30
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 12 to Aug 2
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Plant for fall: Jul 12 to Aug 2
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 12 to Aug 2
Start indoors: Mar 24 to Apr 7Transplant outside: May 26 to Jun 9Sow outdoors: May 26 to Jun 9
Start indoors: Mar 24 to Apr 7Transplant outside: May 12 to May 26
Sow outdoors: Mar 24 to Apr 14Plant for fall: Jul 26 to Aug 16
Sow outdoors: Mar 24 to Apr 14Plant for fall: Aug 23 to Sep 13
Sow outdoors: Mar 31 to May 12Plant for fall: Sep 6 to Sep 27
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to May 26Sow outdoors: May 12 to May 26Plant for fall: Aug 2 to Aug 16
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26Plant for fall: Aug 9 to Aug 23
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to Jun 2
Sow outdoors: Apr 14 to May 12Plant for fall: Jul 26 to Aug 9
Sow outdoors: Apr 14 to May 12Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 14 to May 5
Sow outdoors: Apr 21 to May 19Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 21 to May 12Plant for fall: Aug 23 to Sep 13
Sow outdoors: May 12 to Jun 2Plant for fall: Aug 2 to Aug 16
Sow outdoors: May 12 to May 26
Transplant outside: May 19 to Jun 9
Plant for fall: Oct 4 to Nov 8
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Windsor, OH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 10 – Feb 24 | Apr 7 – Apr 21 | — | — |
| Peppers | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Eggplant | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Tomatoes | Mar 10 – Mar 24 | May 12 – May 26 | — | — |
| Lettuce | Mar 10 – Mar 24 | Apr 14 – Apr 28 | Apr 7 – May 12 | Aug 23 – Sep 20 |
| Kale | Mar 10 – Mar 24 | Apr 7 – Apr 21 | Apr 7 – Apr 21 | Aug 9 – Aug 30 |
| Broccoli | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 12 – Aug 2 |
| Cabbage | Mar 10 – Mar 24 | Apr 14 – Apr 28 | — | Jul 12 – Aug 2 |
| Cauliflower | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 12 – Aug 2 |
| Okra | Mar 24 – Apr 7 | May 26 – Jun 9 | May 26 – Jun 9 | — |
| Basil | Mar 24 – Apr 7 | May 12 – May 26 | — | — |
| Peas | — | — | Mar 24 – Apr 14 | Jul 26 – Aug 16 |
| Spinach | — | — | Mar 24 – Apr 14 | Aug 23 – Sep 13 |
| Radishes | — | — | Mar 31 – May 12 | Sep 6 – Sep 27 |
| Cucumbers | Apr 7 – Apr 14 | May 19 – May 26 | May 12 – May 26 | Aug 2 – Aug 16 |
| Zucchini & Summer Squash | Apr 7 – Apr 14 | — | May 12 – May 26 | Aug 9 – Aug 23 |
| Winter Squash & Pumpkins | Apr 7 – Apr 14 | — | May 12 – May 26 | — |
| Melons & Watermelon | Apr 7 – Apr 14 | May 19 – Jun 2 | — | — |
| Carrots | — | — | Apr 14 – May 12 | Jul 26 – Aug 9 |
| Beets | — | — | Apr 14 – May 12 | Aug 9 – Aug 23 |
| Potatoes | — | — | Apr 14 – May 5 | — |
| Swiss Chard | — | — | Apr 21 – May 19 | Aug 9 – Aug 23 |
| Cilantro | — | — | Apr 21 – May 12 | Aug 23 – Sep 13 |
| Green Beans | — | — | May 12 – Jun 2 | Aug 2 – Aug 16 |
| Sweet Corn | — | — | May 12 – May 26 | — |
| Sweet Potatoes | — | May 19 – Jun 9 | — | — |
| Garlic | — | — | — | Oct 4 – Nov 8 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Chardon, OH weather station, 19 km away (elevation 1,129 ft (344 m)).
Frost dates near Windsor
- Montville May 5 · Oct 18
- Huntsburg May 5 · Oct 18
- Rome May 10 · Oct 10
- Mesopotamia May 1 · Oct 20
- East Claridon May 5 · Oct 18
- Orwell May 10 · Oct 10
- Rock Creek May 10 · Oct 10
- Middlefield May 1 · Oct 20
- Thompson May 5 · Oct 18
- North Bloomfield Apr 30 · Oct 23
Frequently asked questions
When is the last frost in Windsor, OH?
The median last spring frost in Windsor, OH is May 5. There is still about a 10% chance of frost after May 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Windsor, OH?
The median first fall frost is October 18, with about a 10% chance of frost before October 2.
How long is the growing season in Windsor, OH?
About 166 days between the median last spring frost and first fall frost.
What planting zone is Windsor, OH?
Windsor, OH is in USDA hardiness zone 6a.