Houston, PA 15347 Frost Dates
15347, near Houston, PA: the frost window
The last spring frost here typically falls around 04/23, about 238 days from today. 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
Houston's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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 24,634 of 40,283 ZIP codes in this dataset. Within PA, it ranks 836 of 2,088.
Learn more
Two guides worth reading on 15347: zone vs. frost date, on why Zone 6b and Houston's frost date answer different questions, and the frost range, on how to read the range around Houston's dates instead of trusting one.