Portis, KS 67474 Frost Dates
Portis, KS: when does the frost end?
The last spring frost here typically falls around 04/24, about 239 days from today. Fall's first freeze usually shows up around 10/15, roughly 173 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Portis in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Portis's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Portis against the rest of the dataset
At roughly 173 frost-free days, Portis places 28,117 of 40,283 ZIP codes in this dataset. Within KS, it ranks 626 of 745.
Learn more
Before leaning on 67474's figures: local microclimates explains what one yard in Portis can differ from the 67474 normal, while zone vs. frost date explains why Zone 6a and Portis's frost date answer different questions.