Frost dates for 45459 — Dayton, OH
Last spring frostApr 17median date
First fall frostOct 26median date
Growing season192 daysfrost-free
Hardiness zone6bZone 6b
How Dayton compares
- In 8 years out of 10, the last spring frost in Dayton falls between April 3 and May 6, a 33-day window. The first fall frost falls between October 13 and November 6.
- The median last frost is 7 days earlier than the Ohio median of Apr 24.
- Its 192-day growing season is longer than 87% of the 1,063 Ohio places with a regular frost season (state median 180 days).
- The last frost is 5 days earlier than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 103 nights a year at or below 32°F.
- Compared with Cincinnati, OH, 60 km away, the last frost here is the same as there and the growing season is the same length.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 3 |
| 50% (median) | April 17 |
| 10% (safe for tender plants) | May 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 13 |
| 50% (median) | October 26 |
| 90% (late) | November 6 |
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 Dayton, OH
Frost dates for 45459 — Dayton, OH — last frost Apr 17, first frost Oct 26, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Jan 23 to Feb 6Transplant outside: Mar 20 to Apr 3
Start indoors: Feb 6 to Feb 20Transplant outside: May 1 to May 15
Start indoors: Feb 6 to Feb 20Transplant outside: May 1 to May 15
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 24 to May 8
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 27 to Apr 10Sow outdoors: Mar 20 to Apr 24Plant for fall: Aug 31 to Sep 28
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 20 to Apr 3Sow outdoors: Mar 20 to Apr 3Plant for fall: Aug 17 to Sep 7
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 3 to Apr 17Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 27 to Apr 10Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 3 to Apr 17Plant for fall: Jul 20 to Aug 10
Start indoors: Mar 6 to Mar 20Transplant outside: May 8 to May 22Sow outdoors: May 8 to May 22
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 24 to May 8
Sow outdoors: Mar 6 to Mar 27Plant for fall: Aug 3 to Aug 24
Sow outdoors: Mar 6 to Mar 27Plant for fall: Aug 31 to Sep 21
Sow outdoors: Mar 13 to Apr 24Plant for fall: Sep 14 to Oct 5
Start indoors: Mar 20 to Mar 27Transplant outside: May 1 to May 8Sow outdoors: Apr 24 to May 8Plant for fall: Aug 10 to Aug 24
Start indoors: Mar 20 to Mar 27Sow outdoors: Apr 24 to May 8Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 20 to Mar 27Sow outdoors: Apr 24 to May 8
Start indoors: Mar 20 to Mar 27Transplant outside: May 1 to May 15
Sow outdoors: Mar 27 to Apr 24Plant for fall: Aug 3 to Aug 17
Sow outdoors: Mar 27 to Apr 24Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 27 to Apr 17
Sow outdoors: Apr 3 to May 1Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 3 to Apr 24Plant for fall: Aug 31 to Sep 21
Sow outdoors: Apr 24 to May 15Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 24 to May 8
Transplant outside: May 1 to May 22
Plant for fall: Oct 12 to Nov 16
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Dayton, OH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 23 – Feb 6 | Mar 20 – Apr 3 | — | — |
| Peppers | Feb 6 – Feb 20 | May 1 – May 15 | — | — |
| Eggplant | Feb 6 – Feb 20 | May 1 – May 15 | — | — |
| Tomatoes | Feb 20 – Mar 6 | Apr 24 – May 8 | — | — |
| Lettuce | Feb 20 – Mar 6 | Mar 27 – Apr 10 | Mar 20 – Apr 24 | Aug 31 – Sep 28 |
| Kale | Feb 20 – Mar 6 | Mar 20 – Apr 3 | Mar 20 – Apr 3 | Aug 17 – Sep 7 |
| Broccoli | Feb 20 – Mar 6 | Apr 3 – Apr 17 | — | Jul 20 – Aug 10 |
| Cabbage | Feb 20 – Mar 6 | Mar 27 – Apr 10 | — | Jul 20 – Aug 10 |
| Cauliflower | Feb 20 – Mar 6 | Apr 3 – Apr 17 | — | Jul 20 – Aug 10 |
| Okra | Mar 6 – Mar 20 | May 8 – May 22 | May 8 – May 22 | — |
| Basil | Mar 6 – Mar 20 | Apr 24 – May 8 | — | — |
| Peas | — | — | Mar 6 – Mar 27 | Aug 3 – Aug 24 |
| Spinach | — | — | Mar 6 – Mar 27 | Aug 31 – Sep 21 |
| Radishes | — | — | Mar 13 – Apr 24 | Sep 14 – Oct 5 |
| Cucumbers | Mar 20 – Mar 27 | May 1 – May 8 | Apr 24 – May 8 | Aug 10 – Aug 24 |
| Zucchini & Summer Squash | Mar 20 – Mar 27 | — | Apr 24 – May 8 | Aug 17 – Aug 31 |
| Winter Squash & Pumpkins | Mar 20 – Mar 27 | — | Apr 24 – May 8 | — |
| Melons & Watermelon | Mar 20 – Mar 27 | May 1 – May 15 | — | — |
| Carrots | — | — | Mar 27 – Apr 24 | Aug 3 – Aug 17 |
| Beets | — | — | Mar 27 – Apr 24 | Aug 17 – Aug 31 |
| Potatoes | — | — | Mar 27 – Apr 17 | — |
| Swiss Chard | — | — | Apr 3 – May 1 | Aug 17 – Aug 31 |
| Cilantro | — | — | Apr 3 – Apr 24 | Aug 31 – Sep 21 |
| Green Beans | — | — | Apr 24 – May 15 | Aug 10 – Aug 24 |
| Sweet Corn | — | — | Apr 24 – May 8 | — |
| Sweet Potatoes | — | May 1 – May 22 | — | — |
| Garlic | — | — | — | Oct 12 – Nov 16 |
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 Dayton Wright Bros Ap, OH weather station, 8 km away (elevation 961 ft (293 m)).
ZIP codes in Dayton: 45401 45402 45403 45404 45405 45406 45409 45410 45412 45413 45414 45415 45416 45417 45419 45420 45422 45423 45424 45426 45428 45429 45430 45431 45432 45433 45434 45435 45437 45439 45440 45441 45448 45449 45458 45459 45469 45470 45475 45479 45481 45482 45490
Frost dates near Dayton
- Bellbrook Apr 17 · Oct 26
- Miamisburg Apr 18 · Oct 25
- Springboro Apr 17 · Oct 26
- Spring Valley Apr 18 · Oct 24
- Alpha Apr 18 · Oct 25
- Waynesville Apr 17 · Oct 26
- Franklin Apr 24 · Oct 19
- Germantown Apr 24 · Oct 19
Frequently asked questions
When is the last frost in Dayton, OH?
The median last spring frost in Dayton, OH is April 17. There is still about a 10% chance of frost after May 6, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Dayton, OH?
The median first fall frost is October 26, with about a 10% chance of frost before October 13.
How long is the growing season in Dayton, OH?
About 192 days between the median last spring frost and first fall frost.
What planting zone is Dayton, OH?
Dayton, OH is in USDA hardiness zone 6b.