Rhode Island frost dates
Across 11 NOAA climate stations in Rhode Island, the median last spring frost (32°F) ranges from Apr 7 at Newport Rose to May 3 at Kingston; the typical station sees its last frost around Apr 22 and its first fall frost around Oct 20.
“Median” dates have a 50% chance of a later spring frost or an earlier fall frost. “10% risk” dates are the safer choice for tender plants: only 1 year in 10 has frost beyond them. Source: NOAA NCEI 1991–2020 Climate Normals. Elevation matters: within a state, frost dates can differ by a month or more between valleys and hills.
| Station | Elevation | Last frost (median) | Last frost (10% risk) | First frost (median) | First frost (10% risk) | Growing season |
|---|---|---|---|---|---|---|
| Coventry 2 | 280 ft | Apr 22 | May 4 | Oct 20 | Oct 5 | 179 days |
| Kingston | 117 ft | May 3 | May 16 | Oct 8 | Sep 30 | 159 days |
| Kingston 1 Nw | 115 ft | Apr 27 | May 11 | Oct 15 | Oct 2 | 171 days |
| Kingston 1 W | 106 ft | May 1 | May 18 | Oct 12 | Oct 1 | 163 days |
| N Foster 1 E | 630 ft | Apr 25 | May 9 | Oct 19 | Oct 4 | 176 days |
| Newport Rose | 15 ft | Apr 7 | Apr 21 | Nov 13 | Oct 31 | 216 days |
| Newport State AP | 172 ft | Apr 11 | Apr 24 | Nov 4 | Oct 22 | 206 days |
| Providence T F Green AP | 60 ft | Apr 11 | Apr 23 | Oct 30 | Oct 16 | 199 days |
| Tiverton | 90 ft | Apr 11 | Apr 22 | Nov 2 | Oct 20 | 203 days |
| Westerly State AP | 81 ft | Apr 11 | Apr 26 | Oct 31 | Oct 16 | 201 days |
| Woonsocket | 110 ft | Apr 22 | May 6 | Oct 19 | Oct 5 | 179 days |
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