Richlandtown, PA 18955 Frost Dates
Frost dates for Richlandtown, PA, ZIP 18955
The last spring frost here typically falls around 04/29, about 244 days from today. The first fall frost typically arrives around 10/16, about 170 frost-free days later.
Zone 6b (-5 to 0°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 Richlandtown, not a forecast for this year.
What to do before the first frost
Zone 6b around Richlandtown has about 7 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 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Richlandtown compares
About 170 days separate Richlandtown's last and first frost, putting it 29,093 of 40,283 ZIP codes nationally. Within PA, it ranks 1,493 of 2,088.
Learn more
local microclimates explains what one yard in Richlandtown can differ from the 18955 normal, and zone vs. frost date explains why Zone 6b and Richlandtown's frost date answer different questions.