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Frost Dates and Planting Windows in Kansas

The 32°F frost dates at the 176 weather stations in Kansas 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 Kansas

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 10 to May 15 across the state, and the first frost from September 29 to October 26.

32°F frost dates: earliest and latest among 176 stations, by risk level
Risk levelEarliest last frostLatest last frostEarliest first frostLatest first frost
Conservative (10%)April 20BIG HILL LAKE, KS USMay 25BREWSTER 4W, KS USSeptember 21BREWSTER 4W, KS USOctober 184 stations
Typical (30%)April 10GIRARD, KS USMay 15BREWSTER 4W, KS USSeptember 29BREWSTER 4W, KS USOctober 266 stations
Aggressive (50%)April 4GIRARD, KS USMay 9BREWSTER 4W, KS USOctober 4BREWSTER 4W, KS USNovember 12 stations

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 176 stations
Risk levelShortestLongest
Conservative (90% chance of at least this long)123 daysBREWSTER 4W, KS US189 daysBIG HILL LAKE, KS US
Typical (70% chance of at least this long)136 daysBREWSTER 4W, KS US201 daysGIRARD, KS US
Aggressive (50% chance of at least this long)145 daysBREWSTER 4W, KS US209 daysGIRARD, KS US
Number of stations by growing season length, Typical (70% chance of at least this long)
Growing seasonStations
120–139 days1
140–159 days23
160–179 days87
180–199 days63
200–219 days2

Planting windows across Kansas

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 24May 29176 of 176
Bean: Sow outdoorsApril 10May 15176 of 176
Beet: Sow outdoorsMarch 13May 15176 of 176
Beet: Sow for fallJuly 7September 6176 of 176
Broccoli: Transplant outdoorsMarch 13May 1176 of 176
Broccoli: Transplant for fallJune 27September 6176 of 176
Brussels sprouts: Transplant outdoorsMarch 13May 1176 of 176
Brussels sprouts: Transplant for fallJune 7September 16176 of 176
Cabbage: Transplant outdoorsMarch 13May 1176 of 176
Cabbage: Transplant for fallJune 22September 6176 of 176
Cantaloupe: Transplant outdoorsApril 24May 29176 of 176
Cantaloupe: Sow outdoorsApril 24May 29176 of 176
Carrot: Sow outdoorsMarch 13May 15176 of 176
Carrot: Sow for fallJune 27August 27176 of 176
Cucumber: Transplant outdoorsApril 17May 22176 of 176
Cucumber: Sow outdoorsApril 10May 15176 of 176
Eggplant: Transplant outdoorsApril 24May 29176 of 176
Garlic: Plant for fallSeptember 29November 9176 of 176
Lettuce: Transplant outdoorsMarch 13May 1176 of 176
Lettuce: Sow outdoorsMarch 13May 1176 of 176
Lettuce: Sow for fallJune 27September 16176 of 176
Onion: Transplant or plant setsMarch 13May 1176 of 176
Peas: Sow outdoorsMarch 13May 1176 of 176
Peas: Sow for fallJuly 5September 6176 of 176
Pepper: Transplant outdoorsApril 24May 29176 of 176
Potato: Plant seed potatoesMarch 13May 15176 of 176
Pumpkin: Sow outdoorsApril 24May 29176 of 176
Radish: Sow outdoorsMarch 13May 1176 of 176
Radish: Sow for fallAugust 11October 6176 of 176
Spinach: Transplant outdoorsMarch 13May 1176 of 176
Spinach: Sow outdoorsMarch 13May 1176 of 176
Spinach: Sow for fallJuly 17September 19176 of 176
Summer squash: Transplant outdoorsApril 17May 22176 of 176
Summer squash: Sow outdoorsApril 10May 15176 of 176
Sweet corn: Sow outdoorsApril 10May 15176 of 176
Sweet potato: Plant slipsApril 17May 29176 of 176
Tomato: Transplant outdoorsApril 24May 29176 of 176
Turnip: Sow outdoorsMarch 13May 1176 of 176
Turnip: Sow for fallJuly 17September 16176 of 176
Watermelon: Transplant outdoorsApril 24May 29176 of 176
Watermelon: Sow outdoorsApril 24May 29176 of 176

Weather stations in Kansas

Every station in Kansas 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.