Saxonburg, PA 16023 Frost Dates
Frost dates for Saxonburg, PA, ZIP 16023
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 11/02, about 199 frost-free days later.
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 Saxonburg, not a forecast for this year.
What to do before the first frost
Zone 6a around Saxonburg has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Saxonburg compares
Saxonburg's growing season runs about 199 days, ranking 18,149 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 308 of 2,088.
Learn more
local microclimates explains what one yard in Saxonburg can differ from the 16023 normal, and zone vs. frost date explains why Zone 6a and Saxonburg's frost date answer different questions.