Frost dates for 45233 — Cincinnati, OH
How Cincinnati compares
- In 8 years out of 10, the last spring frost in Cincinnati falls between March 31 and May 2, a 32-day window. The first fall frost falls between October 17 and November 13.
- The median last frost is 11 days earlier than the Ohio median of Apr 24.
- Its 201-day growing season is longer than 97% of the 1,063 Ohio places with a regular frost season (state median 180 days).
- The last frost is 9 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 101 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 31 |
| 50% (median) | April 13 |
| 10% (safe for tender plants) | May 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 17 |
| 50% (median) | October 31 |
| 90% (late) | November 13 |
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 45233 — Cincinnati, OH — last frost Apr 13, first frost Oct 31, zone 6b. whenisthelastfrost.com
When to plant vegetables in Cincinnati, OH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 19 – Feb 2 | Mar 16 – Mar 30 | — | — |
| Peppers | Feb 2 – Feb 16 | Apr 27 – May 11 | — | — |
| Eggplant | Feb 2 – Feb 16 | Apr 27 – May 11 | — | — |
| Tomatoes | Feb 16 – Mar 2 | Apr 20 – May 4 | — | — |
| Lettuce | Feb 16 – Mar 2 | Mar 23 – Apr 6 | Mar 16 – Apr 20 | Sep 5 – Oct 3 |
| Kale | Feb 16 – Mar 2 | Mar 16 – Mar 30 | Mar 16 – Mar 30 | Aug 22 – Sep 12 |
| Broccoli | Feb 16 – Mar 2 | Mar 30 – Apr 13 | — | Jul 25 – Aug 15 |
| Cabbage | Feb 16 – Mar 2 | Mar 23 – Apr 6 | — | Jul 25 – Aug 15 |
| Cauliflower | Feb 16 – Mar 2 | Mar 30 – Apr 13 | — | Jul 25 – Aug 15 |
| Okra | Mar 2 – Mar 16 | May 4 – May 18 | May 4 – May 18 | — |
| Basil | Mar 2 – Mar 16 | Apr 20 – May 4 | — | — |
| Peas | — | — | Mar 2 – Mar 23 | Aug 8 – Aug 29 |
| Spinach | — | — | Mar 2 – Mar 23 | Sep 5 – Sep 26 |
| Radishes | — | — | Mar 9 – Apr 20 | Sep 19 – Oct 10 |
| Cucumbers | Mar 16 – Mar 23 | Apr 27 – May 4 | Apr 20 – May 4 | Aug 15 – Aug 29 |
| Zucchini & Summer Squash | Mar 16 – Mar 23 | — | Apr 20 – May 4 | Aug 22 – Sep 5 |
| Winter Squash & Pumpkins | Mar 16 – Mar 23 | — | Apr 20 – May 4 | — |
| Melons & Watermelon | Mar 16 – Mar 23 | Apr 27 – May 11 | — | — |
| Carrots | — | — | Mar 23 – Apr 20 | Aug 8 – Aug 22 |
| Beets | — | — | Mar 23 – Apr 20 | Aug 22 – Sep 5 |
| Potatoes | — | — | Mar 23 – Apr 13 | — |
| Swiss Chard | — | — | Mar 30 – Apr 27 | Aug 22 – Sep 5 |
| Cilantro | — | — | Mar 30 – Apr 20 | Sep 5 – Sep 26 |
| Green Beans | — | — | Apr 20 – May 11 | Aug 15 – Aug 29 |
| Sweet Corn | — | — | Apr 20 – May 4 | — |
| Sweet Potatoes | — | Apr 27 – May 18 | — | — |
| Garlic | — | — | — | Oct 17 – Nov 21 |
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 Cincinnati-Fernbank, OH weather station, 3 km away (elevation 499 ft (152 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
- Mount Saint Joseph Apr 13 · Oct 31
- Addyston Apr 13 · Oct 31
- North Bend Apr 16 · Oct 28
- Cleves Apr 16 · Oct 28
- Hooven Apr 16 · Oct 28
- Miamitown Apr 16 · Oct 28
- Harrison Apr 16 · Oct 28
- Ross Apr 19 · Oct 22
Frequently asked questions
When is the last frost in Cincinnati, OH?
The median last spring frost in Cincinnati, OH is April 13. There is still about a 10% chance of frost after May 2, 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 31, with about a 10% chance of frost before October 17.
How long is the growing season in Cincinnati, OH?
About 201 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.