Lyndon, KS 66543 Frost Dates
Frost dates for Lyndon, KS, ZIP 66543
The last spring frost here typically falls around 04/08, about 223 days from today. The first fall frost typically arrives around 10/31, about 205 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lyndon in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Lyndon has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lyndon compares
Lyndon's growing season runs about 205 days, ranking 16,362 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 33 of 745.
Learn more
zone vs. frost date explains why Zone 6b and Lyndon's frost date answer different questions, and the frost range explains how to read the range around Lyndon's dates instead of trusting one.