Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 02904
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 02904 in zone 6b (the coldest night of a typical year: -5 to 0°F).
The nearest station, Woonsocket, RI, is 9 miles from the ZIP's center: its last spring frost comes after April 22 in half of years and after May 6 in one year in ten. By the USDA's method its plant hardiness zone is 6b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Woonsocket, RI | 9 mi | 110 ft | April 22 | May 6 | October 19 | 6b |
| Providence, RIRhode Island T.f. Green International Airport | 9 mi | 60 ft | April 11 | April 23 | October 30 | 7a |
| Coventry 2, RI | 15 mi | 280 ft | April 22 | May 4 | October 20 | – |
| North Foster (1 mi E), RI | 15 mi | 630 ft | April 25 | May 9 | October 19 | 6b |
| Norton W, MA | 17 mi | 95 ft | April 27 | May 10 | October 15 | – |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Woonsocket
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | May 19 | May 11 | May 5 | April 23 | October 7 | September 26 |
| 32°F | May 6 | April 28 | April 22 | April 9 | October 19 | October 5 |
| 28°F (hard freeze) | April 20 | April 12 | April 7 | March 28 | October 31 | October 16 |
| 24°F | April 7 | April 1 | March 28 | March 12 | November 12 | October 29 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.