Frost dates for Tiverton, RI
At Tiverton, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Nov 2, for a typical growing season of 203 days. For a 90% chance that the last frost has passed, wait until Apr 22. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 203 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 26 | May 7 |
| 32°F | Apr 1 | Apr 11 | Apr 22 |
| 28°F | Mar 19 | Mar 31 | Apr 11 |
| 24°F | Mar 7 | Mar 21 | Apr 3 |
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 8 | Oct 21 | Nov 3 |
| 32°F | Oct 20 | Nov 2 | Nov 15 |
| 28°F | Nov 2 | Nov 13 | Nov 30 |
| 24°F | Nov 10 | Nov 25 | Dec 12 |
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 | 160 days | 178 days | 195 days |
| 32°F | 186 days | 203 days | 220 days |
| 28°F | 210 days | 227 days | 247 days |
| 24°F | 229 days | 248 days | 272 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 |
|---|---|---|---|
| 02878 | 7a | 0 to 5°F | 3 km |
| 02871 | 7a | 0 to 5°F | 6 km |
| 02724 | 7a | 0 to 5°F | 7 km |
| 02721 | 7a | 0 to 5°F | 7 km |
| 02809 | 7a | 0 to 5°F | 8 km |
| 02723 | 7a | 0 to 5°F | 10 km |
| 02725 | 7a | 0 to 5°F | 11 km |
| 02790 | 7a | 0 to 5°F | 11 km |
| 02885 | 7a | 0 to 5°F | 12 km |
| 02777 | 7a | 0 to 5°F | 15 km |
| 02791 | 7a | 0 to 5°F | 15 km |
| 02726 | 7a | 0 to 5°F | 16 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 USC00377581, at 41.6267, -71.2092, elevation 27 m (90 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 105.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newport State Airport (12 km)
- Newport Rose (18 km)
- Providence T F Green Airport (21 km)
- Coventry 2 (29 km)
- Kingston 1 NW (31 km)
- Kingston (32 km)
- Kingston 1 W (32 km)
- Woonsocket (46 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.