Frost dates for Newport State Airport, RI
At Newport State Airport, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Nov 4, for a typical growing season of 206 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 206 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 15 | Apr 27 | May 8 |
| 32°F | Mar 31 | Apr 11 | Apr 24 |
| 28°F | Mar 17 | Mar 31 | Apr 10 |
| 24°F | Mar 7 | Mar 20 | Apr 1 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 10 | Oct 24 | Nov 6 |
| 32°F | Oct 22 | Nov 4 | Nov 17 |
| 28°F | Nov 2 | Nov 16 | Dec 2 |
| 24°F | Nov 13 | Nov 29 | Dec 13 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 161 days | 179 days | 196 days |
| 32°F | 187 days | 206 days | 223 days |
| 28°F | 213 days | 230 days | 250 days |
| 24°F | 233 days | 252 days | 274 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 02842 | 7a | 0 to 5°F | 2 km |
| 02872 | 7a | 0 to 5°F | 8 km |
| 02837 | 7a | 0 to 5°F | 10 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00014787, at 41.5333, -71.2833, elevation 52 m (172 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 98.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newport Rose (7 km)
- Tiverton (12 km)
- Kingston 1 NW (22 km)
- Kingston (22 km)
- Kingston 1 W (22 km)
- Providence T F Green Airport (24 km)
- Coventry 2 (27 km)
- Westerly State Airport (48 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.