Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 02835 — Jamestown, RI

ZIP code 02835 (Jamestown, Newport County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 7 and the first fall frost November 13.

Where ZIP 02835 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 7
First frostNov 13
2012 zone7a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Jamestown, RI…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Jamestown, RI

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 7median — 50% chance of a later frost
Safe for tender plantsApril 21only 10% chance of frost after
First fall frostNovember 13median — 10% chance by Oct 31
Growing season216 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 28 and returns around November 25.

From the NOAA station Newport Rose, RI — 2 miles away, elevation 16 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 02835

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 24 – Mar 10
SpinachSow outdoors · Feb 24 – Mar 17
Broccoli, cabbageStart indoors · Jan 27 – Feb 10
Broccoli, cabbageTransplant · Mar 17 – Mar 31
Onion setsPlant outdoors · Mar 10 – Mar 24
PotatoesPlant outdoors · Mar 17 – Mar 31
LettuceSow outdoors · Mar 10 – Mar 24
Carrots, beetsSow outdoors · Mar 17 – Mar 31
TomatoesStart indoors · Feb 10 – Feb 24
TomatoesTransplant · Apr 14 – Apr 28
Peppers, eggplantStart indoors · Jan 27 – Feb 10
Peppers, eggplantTransplant · Apr 21 – May 5
BeansSow outdoors · Apr 14 – Apr 28
Sweet cornSow outdoors · Apr 14 – Apr 28
Cucumbers, squashSow outdoors · Apr 14 – Apr 28
Fall lettuce, spinachSow outdoors · Sep 18 – Oct 2
GarlicPlant cloves · Oct 30 – Dec 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 7) and first fall frost (Nov 13) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 02835 came on Apr 6 — 5 days later than the 1991–2020 average (Apr 1).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Jamestown, RI

The soil mapped at the center of ZIP 02835 is Newport — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4%moderate
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Newport silt loam, 0 to 3 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 02835; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Jamestown, RI

Summer high78 °Faverage high, August
Winter low24 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights89nights a year at 32 °F or less
Growing degree days2,713base 50 °F — the season’s usable heat
Longest day15 h 11 mindaylight on June 21
Shortest day9 h 10 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation47.5 inper year, rain and melted snow
Snowfall26 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 39 °F, low 24 °F 39°24° JanFebruary: average high 40 °F, low 25 °F 40°25° FebMarch: average high 46 °F, low 32 °F 46°32° MarApril: average high 55 °F, low 40 °F 55°40° AprMay: average high 65 °F, low 49 °F 65°49° MayJune: average high 72 °F, low 58 °F 72°58° JunJuly: average high 77 °F, low 64 °F 77°64° JulAugust: average high 78 °F, low 64 °F 78°64° AugSeptember: average high 73 °F, low 59 °F 73°59° SepOctober: average high 63 °F, low 49 °F 63°49° OctNovember: average high 53 °F, low 40 °F 53°40° NovDecember: average high 44 °F, low 31 °F 44°31° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 4.03 in precipitation, 5.5 in snowfall 4.0❄6 JanFebruary: 3.57 in precipitation, 9.1 in snowfall 3.6❄9 FebMarch: 4.61 in precipitation, 4.8 in snowfall 4.6❄5 MarApril: 4.73 in precipitation, 1.3 in snowfall 4.7❄1 AprMay: 3.91 in precipitation 3.9 MayJune: 3.17 in precipitation 3.2 JunJuly: 3.21 in precipitation 3.2 JulAugust: 3.29 in precipitation 3.3 AugSeptember: 3.82 in precipitation 3.8 SepOctober: 4.72 in precipitation 4.7 OctNovember: 3.94 in precipitation, 0.1 in snowfall 3.9 NovDecember: 4.45 in precipitation, 5.2 in snowfall 4.5❄5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Newport Rose, RI (2 mi away); precipitation: Newport Rose, RI (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

028417a
Newport, RI · 3 mi
028407a
Newport, RI · 4 mi
028747a
Saunderstown, RI · 5 mi
028017a
Adamsville, RI · 5 mi
028427a
Middletown, RI · 5 mi
028727a
Prudence Island, RI · 7 mi
028527a
North Kingstown, RI · 7 mi
028837a
Peace Dale, RI · 7 mi

Rhode Island planting zones →

Questions about 02835

What planting zone is ZIP code 02835?

ZIP code 02835 (Jamestown, RI) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Jamestown, RI?

The median last spring frost (32 °F) near 02835 is April 7; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Newport Rose station.

When is the first frost in Jamestown, RI?

The median first fall frost near 02835 is November 13, giving a median frost-free growing season of 216 days.

When should I plant tomatoes in 02835?

Start tomato seeds indoors around Feb 10 – Feb 24 and set transplants outside around Apr 14 – Apr 28, one to three weeks after the median last frost.

How much rain and snow does 02835 get?

About 47.5 inches of precipitation a year and 26 inches of snowfall (NOAA 1991–2020 normals, Newport Rose station).

How hot do summers get in Jamestown, RI?

The average high peaks at 78 °F in August, with about 2 days a year at 90 °F or more.

What kind of soil does 02835 have?

The USDA soil survey maps Newport at the center of ZIP 02835: silt loam, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Jamestown, RI in 2026?

Spring leaf-out near 02835 came on Apr 6 in 2026, 5 days later than the 1991–2020 average (Apr 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Jamestown, RI?

Long-day onions: the longest day near 02835 is 15 h 11 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).