Simpson, KS 67478 Frost Dates
Simpson, KS: when does the frost end?
Around 04/19 is the usual last spring frost, about 234 days away. Fall's first freeze usually shows up around 10/19, roughly 181 days after the last spring frost.
Simpson sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 7 weeks until Simpson's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Simpson's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Simpson against the rest of the dataset
At roughly 181 frost-free days, Simpson places 24,746 of 40,283 ZIP codes in this dataset. Within KS, it ranks 501 of 745.
Learn more
Before leaning on 67478's figures: the frost range explains how to read the range around Simpson's dates instead of trusting one, while local microclimates explains what one yard in Simpson can differ from the 67478 normal.