Photo: Swampyank at English Wikipedia · CC BY 3.0Jamestown’s winters are milder but snowier than most of the U.S.
A typical July afternoon reaches 81°, a January night drops to 24°, and about 26 inches of snow falls in a normal winter.
A year in Jamestown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jamestown’s climate
Compared with towns across the U.S., with Jamestown’s place in Rhode Island beside it.
What a year in Jamestown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 216 frost-free days a year
In half of years the last 32° night comes by April 7 and the first by November 13. Frost and day counts come from NOAA’s station at Newport Rose, RI, 1.7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Jamestown’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 26 inches of snow a winter
Snow, measured at Newport Rose, RI, falls mostly in February. Precipitation (rain plus melted snow) adds up to 47 inches a year; March is the wettest month and July the driest. Rain or snow falls on about 126 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jamestown
91% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Newport Rose, RI.
Living with Jamestown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
216 frost-free days in zone 7a. The last frost comes by Apr 7 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 13.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 11 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jamestown from natural hazards, river flooding is the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jamestown and its neighbors
Every town next door is within a degree of Jamestown in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Jamestown’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Jamestown, RI | 24° | 81° | 47" | 26" |
| Galax, VA | 25° | 82° | 48" | 17" |
| Princeton, WV | 23° | 82° | 41" | 24" |
| Jeannette, PA | 21° | 83° | 44" | 30" |
| Lake Mohawk, NJ | 18° | 83° | 49" | 28" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Jamestown averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.5°).
A bigger shift than in 92% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Jamestown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jamestown’s place among Rhode Island’s.
Jamestown weather by month
Highs, lows and precipitation from NOAA’s grid at Jamestown’s center; snow, wet days and snow on the ground from Newport Rose, RI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 24° | 3.8" | 5.5" | 12 | 22° – 38° |
| February | 40° | 25° | 3.4" | 9.1" | 9 | 20° – 39° |
| March | 47° | 30° | 4.9" | 4.8" | 12 | 33° – 45° |
| April | 56° | 39° | 4.3" | 1.3" | 12 | 44° – 52° |
| May | 66° | 49° | 3.4" | 0.0" | 12 | 52° – 62° |
| June | 75° | 58° | 3.6" | 0.0" | 10 | 64° – 69° |
| July | 81° | 65° | 3.1" | 0.0" | 9 | 69° – 76° |
| August | 80° | 64° | 3.7" | 0.0" | 11 | 68° – 76° |
| September | 74° | 57° | 3.9" | 0.0" | 11 | 63° – 69° |
| October | 63° | 47° | 4.5" | 0.0" | 9 | 51° – 61° |
| November | 53° | 38° | 4.0" | 0.1" | 10 | 41° – 49° |
| December | 44° | 29° | 4.6" | 5.2" | 11 | 31° – 47° |
| Year | 60° | 44° | 47.3" | 26.0" | 126 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 20° to 39°. June is the most reliable, staying within 6°.
Where Jamestown’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Jamestown’s center.
- Snow: Newport Rose, RI (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Newport Rose, RI, 1.7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Jamestown’s climate
What is the weather like in Jamestown?
A typical July afternoon reaches 81°, a January night drops to 24°, and about 26 inches of snow falls in a normal winter. Milder January nights than 59% of U.S. towns; cooler July afternoons than 89% of U.S. towns.
How cold does it get in Jamestown in winter?
January nights average 24°. About 89 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Jamestown get?
About 26 inches in a normal winter at Newport Rose, RI, most of it in February.
How hot does it get in Jamestown?
July, with a typical high of 81° and a low of 65°. About 2 days a year reach 90° (Newport Rose, RI).
When is the first and last frost in Jamestown?
In half of years the last spring frost (32°) comes by April 7 and the first fall frost by November 13, about 216 frost-free days, at Newport Rose, RI.
What growing zone is Jamestown in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit Jamestown?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jamestown getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jamestown.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.