Milltown, NJ 08989 Frost Dates
When can you plant in Milltown, NJ?
Around 04/17 is the usual last spring frost, about 232 days away. The first fall frost typically arrives around 10/23, about 190 frost-free days later.
The USDA Plant Hardiness Zone Map puts Milltown 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 Milltown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Milltown compares
About 190 days separate Milltown's last and first frost, putting it 21,130 of 40,283 ZIP codes nationally. Within NJ, it ranks 582 of 906.
Learn more
zone vs. frost date covers why Zone 7a and Milltown's frost date answer different questions. the frost range covers how to read the range around Milltown's dates instead of trusting one.