Frost dates for 45240 — Cincinnati, OH
How Cincinnati compares
- In 8 years out of 10, the last spring frost in Cincinnati falls between April 2 and May 7, a 35-day window. The first fall frost falls between October 9 and November 3.
- The median last frost is 5 days earlier than the Ohio median of Apr 24.
- Its 186-day growing season is longer than 70% of the 1,063 Ohio places with a regular frost season (state median 180 days).
- The last frost is typical for zone 6b, where the median is Apr 22.
- The weather station records an average of 114 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 2 |
| 50% (median) | April 19 |
| 10% (safe for tender plants) | May 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 9 |
| 50% (median) | October 22 |
| 90% (late) | November 3 |
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 Cincinnati, OH
Frost dates for 45240 — Cincinnati, OH — last frost Apr 19, first frost Oct 22, zone 6b. whenisthelastfrost.com
When to plant vegetables in Cincinnati, OH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 25 – Feb 8 | Mar 22 – Apr 5 | — | — |
| Peppers | Feb 8 – Feb 22 | May 3 – May 17 | — | — |
| Eggplant | Feb 8 – Feb 22 | May 3 – May 17 | — | — |
| Tomatoes | Feb 22 – Mar 8 | Apr 26 – May 10 | — | — |
| Lettuce | Feb 22 – Mar 8 | Mar 29 – Apr 12 | Mar 22 – Apr 26 | Aug 27 – Sep 24 |
| Kale | Feb 22 – Mar 8 | Mar 22 – Apr 5 | Mar 22 – Apr 5 | Aug 13 – Sep 3 |
| Broccoli | Feb 22 – Mar 8 | Apr 5 – Apr 19 | — | Jul 16 – Aug 6 |
| Cabbage | Feb 22 – Mar 8 | Mar 29 – Apr 12 | — | Jul 16 – Aug 6 |
| Cauliflower | Feb 22 – Mar 8 | Apr 5 – Apr 19 | — | Jul 16 – Aug 6 |
| Okra | Mar 8 – Mar 22 | May 10 – May 24 | May 10 – May 24 | — |
| Basil | Mar 8 – Mar 22 | Apr 26 – May 10 | — | — |
| Peas | — | — | Mar 8 – Mar 29 | Jul 30 – Aug 20 |
| Spinach | — | — | Mar 8 – Mar 29 | Aug 27 – Sep 17 |
| Radishes | — | — | Mar 15 – Apr 26 | Sep 10 – Oct 1 |
| Cucumbers | Mar 22 – Mar 29 | May 3 – May 10 | Apr 26 – May 10 | Aug 6 – Aug 20 |
| Zucchini & Summer Squash | Mar 22 – Mar 29 | — | Apr 26 – May 10 | Aug 13 – Aug 27 |
| Winter Squash & Pumpkins | Mar 22 – Mar 29 | — | Apr 26 – May 10 | — |
| Melons & Watermelon | Mar 22 – Mar 29 | May 3 – May 17 | — | — |
| Carrots | — | — | Mar 29 – Apr 26 | Jul 30 – Aug 13 |
| Beets | — | — | Mar 29 – Apr 26 | Aug 13 – Aug 27 |
| Potatoes | — | — | Mar 29 – Apr 19 | — |
| Swiss Chard | — | — | Apr 5 – May 3 | Aug 13 – Aug 27 |
| Cilantro | — | — | Apr 5 – Apr 26 | Aug 27 – Sep 17 |
| Green Beans | — | — | Apr 26 – May 17 | Aug 6 – Aug 20 |
| Sweet Corn | — | — | Apr 26 – May 10 | — |
| Sweet Potatoes | — | May 3 – May 24 | — | — |
| Garlic | — | — | — | Oct 8 – Nov 12 |
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 Fairfield, OH weather station, 9 km away (elevation 574 ft (175 m)).
ZIP codes in Cincinnati: 45201 45202 45203 45204 45205 45206 45207 45208 45209 45211 45212 45213 45214 45215 45216 45217 45218 45219 45220 45221 45222 45223 45224 45225 45226 45227 45229 45230 45231 45232 45233 45234 45235 45236 45237 45238 45239 45240 45241 45242 45243 45244 45245 45246 45247 45248 45249 45250 45251 45252 45253 45254 45255 45258 45262 45263 45264 45267 45268 45269 …
Frost dates near Cincinnati
- Ross Apr 19 · Oct 22
- Fairfield Apr 22 · Oct 18
- West Chester Apr 22 · Oct 18
- Hamilton Apr 22 · Oct 18
- Shandon Apr 19 · Oct 22
- Miamitown Apr 16 · Oct 28
- Overpeck Apr 22 · Oct 18
- Mason Apr 23 · Oct 18
Frequently asked questions
When is the last frost in Cincinnati, OH?
The median last spring frost in Cincinnati, OH is April 19. There is still about a 10% chance of frost after May 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Cincinnati, OH?
The median first fall frost is October 22, with about a 10% chance of frost before October 9.
How long is the growing season in Cincinnati, OH?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Cincinnati, OH?
Cincinnati, OH is in USDA hardiness zone 6b.