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Frost Dates and Planting Windows in Ohio

The 32°F frost dates at the 130 weather stations in Ohio with NOAA's 1991–2020 Climate Normals, and the planting windows they give. These are long-term statistics, not a forecast. For the dates at the station nearest you, enter your ZIP code.

The planner uses the weather station nearest your ZIP code.

Frost dates across Ohio

Each risk level uses a date with a set chance of frost. In spring, it's the chance of a 32°F frost on or after the last-frost date. In fall, it's the chance of the first 32°F frost on or before the first-frost date. At the Typical level (30%), the last frost ranges from April 14 to May 18 across the state, and the first frost from October 3 to November 7.

32°F frost dates: earliest and latest among 130 stations, by risk level
Risk levelEarliest last frostLatest last frostEarliest first frostLatest first frost
Conservative (10%)April 20CLEVELAND BURKE AP, OH USMay 27DORSET, OH USSeptember 24DANVILLE 2 W, OH USNovember 1CLEVELAND BURKE AP, OH US
Typical (30%)April 14CLEVELAND BURKE AP, OH USMay 18DORSET, OH USOctober 3DANVILLE 2 W, OH USNovember 7CLEVELAND BURKE AP, OH US
Aggressive (50%)April 8CLEVELAND BURKE AP, OH USMay 10DORSET, OH USOctober 8DANVILLE 2 W, OH USNovember 12CLEVELAND BURKE AP, OH US

Growing season length

The growing season is the stretch between the last spring frost and the first fall frost at 32°F. NOAA gives it as a length with a chance of being at least that long. Each risk level uses the length with that chance of a shorter season, so Conservative shows the shortest lengths.

Growing season at 32°F: shortest and longest among 130 stations
Risk levelShortestLongest
Conservative (90% chance of at least this long)131 daysDORSET, OH US200 daysCLEVELAND BURKE AP, OH US
Typical (70% chance of at least this long)144 daysDORSET, OH US210 daysCLEVELAND BURKE AP, OH US
Aggressive (50% chance of at least this long)154 daysDORSET, OH US217 daysCLEVELAND BURKE AP, OH US
Number of stations by growing season length, Typical (70% chance of at least this long)
Growing seasonStations
140–159 days16
160–179 days88
180–199 days23
200–219 days3

Planting windows across Ohio

For each crop, the earliest start and the latest end of its Typical windows among the stations. A window at any one station is shorter and falls inside this span. Transplant dates are for seedlings.

Typical planting windows (30% frost dates): earliest start and latest end among stations
Crop and taskEarliest startLatest endStations
Basil: Transplant outdoorsApril 28June 1130 of 130
Bean: Sow outdoorsApril 14May 18130 of 130
Beet: Sow outdoorsMarch 17May 18130 of 130
Beet: Sow for fallJuly 11September 18130 of 130
Broccoli: Transplant outdoorsMarch 17May 4130 of 130
Broccoli: Transplant for fallJuly 1September 18130 of 130
Brussels sprouts: Transplant outdoorsMarch 17May 4130 of 130
Brussels sprouts: Transplant for fallJune 11September 28130 of 130
Cabbage: Transplant outdoorsMarch 17May 4130 of 130
Cabbage: Transplant for fallJune 26September 18130 of 130
Cantaloupe: Transplant outdoorsApril 28June 1130 of 130
Cantaloupe: Sow outdoorsApril 28June 1130 of 130
Carrot: Sow outdoorsMarch 17May 18130 of 130
Carrot: Sow for fallJuly 1September 8130 of 130
Cucumber: Transplant outdoorsApril 21May 25130 of 130
Cucumber: Sow outdoorsApril 14May 18130 of 130
Eggplant: Transplant outdoorsApril 28June 1130 of 130
Garlic: Plant for fallOctober 3November 21130 of 130
Lettuce: Transplant outdoorsMarch 17May 4130 of 130
Lettuce: Sow outdoorsMarch 17May 4130 of 130
Lettuce: Sow for fallJuly 1September 28130 of 130
Onion: Transplant or plant setsMarch 17May 4130 of 130
Peas: Sow outdoorsMarch 17May 4130 of 130
Peas: Sow for fallJuly 9September 18130 of 130
Pepper: Transplant outdoorsApril 28June 1130 of 130
Potato: Plant seed potatoesMarch 17May 18130 of 130
Pumpkin: Sow outdoorsApril 28June 1130 of 130
Radish: Sow outdoorsMarch 17May 4130 of 130
Radish: Sow for fallAugust 15October 18130 of 130
Spinach: Transplant outdoorsMarch 17May 4130 of 130
Spinach: Sow outdoorsMarch 17May 4130 of 130
Spinach: Sow for fallJuly 21October 1130 of 130
Summer squash: Transplant outdoorsApril 21May 25130 of 130
Summer squash: Sow outdoorsApril 14May 18130 of 130
Sweet corn: Sow outdoorsApril 14May 18130 of 130
Sweet potato: Plant slipsApril 21June 1130 of 130
Tomato: Transplant outdoorsApril 28June 1130 of 130
Turnip: Sow outdoorsMarch 17May 4130 of 130
Turnip: Sow for fallJuly 21September 28130 of 130
Watermelon: Transplant outdoorsApril 28June 1130 of 130
Watermelon: Sow outdoorsApril 28June 1130 of 130

Weather stations in Ohio

Every station in Ohio with NOAA frost-date normals, with its Typical 32°F frost dates and growing season.

Data sources

NOAA U.S. Climate Normals, frost dates, 1991–2020 normals, version 1.0.1
Files: us-climate-normals_1991-2020_v1.0.1_annualseasonal_multivariate_by-station_c20230404.tar.gz, inventory_30yr.txt from NOAA NCEI. Retrieved October 10, 2026.