Last spring frost
Apr 7
Frost Dates for Newport, RI
First fall frost
Nov 13
Growing season
216 days
Hardiness zone
7a
In an average year around Newport, RI, the last spring frost (32°F) is about Apr 7 and the first fall frost is about Nov 13, giving roughly a 216-day growing season. To be safe most years, wait until Mar 28 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 6 | Apr 23 | Apr 10 |
| Freeze (32°F) | Apr 21 | Apr 7 | Mar 28 |
| Hard (28°F) | Apr 8 | Mar 28 | Mar 14 |
| Severe (24°F) | Mar 31 | Mar 17 | Mar 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 6 | May 2 | Apr 29 | Apr 26 | Apr 23 | Apr 21 | Apr 19 | Apr 15 | Apr 10 |
| 32°F | Apr 21 | Apr 17 | Apr 14 | Apr 10 | Apr 7 | Apr 5 | Apr 3 | Apr 1 | Mar 28 |
| 28°F | Apr 8 | Apr 4 | Apr 1 | Mar 31 | Mar 28 | Mar 25 | Mar 22 | Mar 18 | Mar 14 |
| 24°F | Mar 31 | Mar 27 | Mar 23 | Mar 19 | Mar 17 | Mar 14 | Mar 11 | Mar 7 | Mar 3 |
| 20°F | Mar 23 | Mar 18 | Mar 14 | Mar 11 | Mar 8 | Mar 5 | Mar 3 | Feb 27 | Feb 20 |
| 16°F | Mar 14 | Mar 8 | Mar 5 | Mar 2 | Feb 28 | Feb 23 | Feb 18 | Feb 12 | Feb 4 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 17 | Nov 1 | Nov 12 |
| Freeze (32°F) | Oct 31 | Nov 13 | Nov 27 |
| Hard (28°F) | Nov 11 | Nov 25 | Dec 11 |
| Severe (24°F) | Nov 21 | Dec 6 | Dec 24 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 17 | Oct 22 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 5 | Nov 8 | Nov 12 |
| 32°F | Oct 31 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 15 | Nov 18 | Nov 21 | Nov 27 |
| 28°F | Nov 11 | Nov 15 | Nov 19 | Nov 22 | Nov 25 | Nov 28 | Dec 1 | Dec 5 | Dec 11 |
| 24°F | Nov 21 | Nov 27 | Dec 1 | Dec 3 | Dec 6 | Dec 10 | Dec 14 | Dec 19 | Dec 24 |
| 20°F | Dec 1 | Dec 6 | Dec 10 | Dec 15 | Dec 18 | Dec 22 | Dec 26 | Dec 31 | Jan 7 |
| 16°F | Dec 11 | Dec 17 | Dec 22 | Dec 26 | Dec 30 | Jan 2 | Jan 5 | Jan 12 | Jan 18 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Newport Rose, Ri, about 1.2 miles away@if(!empty($station['elevation_ft'])), at 15 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Newport, RI?
On average, the last spring frost (32°F) around Newport, RI is about Apr 7. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 28.
When is the first frost in the fall?
The first fall frost around Newport, RI typically arrives about Nov 13. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 7 on average, or Mar 28 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 216 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 02841 Planting calendar → Rhode Island frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026