West Conshohocken, PA 19085 Frost Dates
When can you plant in West Conshohocken, PA?
Around 04/08 is the usual last spring frost, about 223 days away. The first fall frost typically arrives around 10/31, about 203 frost-free days later.
The USDA Plant Hardiness Zone Map puts West Conshohocken 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 9 weeks of growing season left in West Conshohocken before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around West Conshohocken's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How West Conshohocken compares
West Conshohocken's growing season runs about 203 days, ranking 16,948 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 212 of 2,088.
Learn more
zone vs. frost date covers why Zone 7a and West Conshohocken's frost date answer different questions. the frost range covers how to read the range around West Conshohocken's dates instead of trusting one.