Burnham, PA 17099 Frost Dates
When can you plant in Burnham, PA?
Typically, the last spring freeze lands around 04/21, roughly 236 days out. The first fall frost typically arrives around 10/24, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts Burnham in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Burnham before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Burnham's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Burnham compares
Burnham's growing season runs about 185 days, ranking 23,196 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 709 of 2,088.
Learn more
zone vs. frost date covers why Zone 7a and Burnham's frost date answer different questions. the frost range covers how to read the range around Burnham's dates instead of trusting one.