Westfield, PA 16950 Frost Dates
Westfield, PA: when does the frost end?
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 10/12, roughly 155 days after the last spring frost.
Zone 6a (-10 to -5°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 Westfield, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Westfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Westfield against the rest of the dataset
Westfield's growing season runs about 155 days, ranking 34,039 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,794 of 2,088.
Learn more
Before leaning on 16950's figures: zone vs. frost date explains why Zone 6a and Westfield's frost date answer different questions, while the frost range explains how to read the range around Westfield's dates instead of trusting one.