Frost dates for Cincinnati, OH
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
April 16
typical year
Safe to plant
May 3
frost is over in 9 of 10 years
First fall frost
October 25
typical year
Growing season
190 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Mar 19 – Apr 2 | – |
| Spinach | – | Mar 5 – 26 | Aug 30 – Sep 13 |
| Lettuce | – | Mar 19 – Apr 9 | Aug 30 – Sep 13 |
| Radishes | – | Mar 19 – Apr 30 | Sep 13 – 27 |
| Onions | – | Mar 19 – Apr 2 | – |
| Potatoes | – | Mar 26 – Apr 9 | – |
| Carrots | – | Mar 26 – Apr 16 | Aug 2 – 16 |
| Beets | – | Mar 19 – Apr 2 | Aug 16 – 30 |
| Kale | Feb 5 – 19 | Mar 19 – Apr 2 | Aug 16 – 30 |
| Broccoli | Feb 5 – 19 | Apr 2 – 16 | Aug 16 – 30 |
| Cabbage | Jan 22 – Feb 5 | Mar 19 – Apr 2 | Aug 16 – 30 |
| Garlic | – | – | Sep 13 – Oct 4 |
| Warm-season crops | |||
| Tomatoes | Mar 8 – 22 | May 3 – 17 | – |
| Peppers | Mar 1 – 15 | May 10 – 24 | – |
| Cucumbers | – | May 3 – 24 | – |
| Zucchini | – | May 3 – 31 | – |
| Pumpkins | – | May 3 – 24 | – |
| Green beans | – | May 3 – Aug 16 | – |
| Sweet corn | – | May 3 – 31 | – |
| Basil | Mar 29 – Apr 12 | May 10 – 17 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | May 3 | April 16 | April 2 |
| Fall frost before | October 12 | October 25 | November 5 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around April 2 (April 18 in a late year), and the first one in fall around November 4.
Towns that use these dates
This is the nearest NOAA station with frost records for 32 towns.
Cincinnati, Covington, KY, Norwood, Fort Thomas, KY, Newport, KY, Alexandria, KY, Taylor Mill, KY, Cold Spring, KY, Highland Heights, KY, Dayton, KY, Bellevue, KY, Silverton, St. Bernard, Southgate, KY, Amberley, Golf Manor, Lockland, Mariemont, Park Hills, KY, Wilder, KY, New Richmond, Newtown, Elmwood Place, Fairfax, Silver Grove, KY, Ryland Heights, KY, Arlington Heights, Melbourne, KY, Crestview, KY, Woodlawn, KY, Fairview, KY, Kenton Vale, KY
Where these dates come from
NOAA weather station CINCINNATI LUNKEN AP, OH US (USW00093812), 1991–2020 climate normals. It's the nearest station for 31 zip codes, all within 13 miles:
41001, 41011, 41014, 41015, 41059, 41071, 41073, 41074, 41075, 41076, 41085, 45202, 45206, 45207, 45208, 45209, 45212, 45213, 45215, 45216, 45217, 45219, 45226, 45227, 45229, 45230, 45237, 45244, 45245, 45255, 45267
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.