Warwick, RI 02818 Frost Dates
Frost dates for Warwick, RI, ZIP 02818
Around 04/11 is the usual last spring frost, about 226 days away. The first fall frost typically arrives around 10/30, about 199 frost-free days later.
The USDA Plant Hardiness Zone Map puts Warwick 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
Zone 7a around Warwick 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 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 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 Warwick compares
At roughly 199 frost-free days, Warwick places 17,999 of 40,283 ZIP codes in this dataset. Within RI, it ranks 36 of 79.
Learn more
zone vs. frost date explains why Zone 7a and Warwick's frost date answer different questions, and the frost range explains how to read the range around Warwick's dates instead of trusting one.