Houston, PA 15363 Frost Dates
Houston, PA: when does the frost end?
Typically, the last spring freeze lands around 04/23, roughly 238 days out. Fall's first freeze usually shows up around 10/23, roughly 181 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Houston, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Houston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Houston's last frost
04/23 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 05/12 and only about 1 year in 10 sees frost after that.
Houston against the rest of the dataset
At roughly 181 frost-free days, Houston places 24,635 of 40,283 ZIP codes in this dataset. Within PA, it ranks 837 of 2,088.
Learn more
Before leaning on 15363's figures: the frost range explains how to read the range around Houston's dates instead of trusting one, while local microclimates explains what one yard in Houston can differ from the 15363 normal.