Mifflinburg, PA 17844 Frost Dates
When can you plant in Mifflinburg, PA?
The last spring frost here typically falls around 04/25, about 240 days from today. The first fall frost typically arrives around 10/19, about 175 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mifflinburg in Zone 6b (-5 to 0°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 7 weeks of growing season left in Mifflinburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mifflinburg's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mifflinburg compares
Mifflinburg's growing season runs about 175 days, ranking 26,922 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,151 of 2,088.
Learn more
zone vs. frost date covers why Zone 6b and Mifflinburg's frost date answer different questions. the frost range covers how to read the range around Mifflinburg's dates instead of trusting one.