North Stonington, CT climate
North Stonington has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 20°, and about 38 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in North Stonington feels like
Winter
Spring
Summer
Fall
North Stonington weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 38° | 20° | 3.7" | 11.1" | 11 | 21° – 35° |
| February | 40° | 22° | 3.1" | 8.3" | 8 | 18° – 37° |
| March | 47° | 28° | 4.5" | 6.5" | 10 | 32° – 46° |
| April | 58° | 37° | 4.2" | 1.9" | 9 | 44° – 52° |
| May | 68° | 47° | 3.6" | 0 | 9 | 52° – 62° |
| June | 76° | 56° | 3.9" | 0 | 9 | 64° – 69° |
| July | 82° | 62° | 3.3" | 0 | 8 | 68° – 76° |
| August | 81° | 61° | 3.8" | 0 | 9 | 68° – 75° |
| September | 74° | 54° | 4.0" | 0 | 9 | 61° – 67° |
| October | 63° | 43° | 4.6" | 0 | 9 | 50° – 59° |
| November | 52° | 34° | 3.8" | 1.5" | 9 | 39° – 48° |
| December | 43° | 26° | 4.5" | 8.7" | 10 | 28° – 46° |
| Year | 60° | 41° | 46.9" | 38.0" | 111 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in North Stonington
North Stonington gets 47 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 111 days a year.
About 192 frost-free days a year
In half of years the last 32° night comes by April 14 and the first one by October 24. That leaves about 192 frost-free days for gardens, longer than 66% of U.S. towns.
Heating and cooling a home in North Stonington
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In North Stonington, 87% of that work is heating and 13% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
North Stonington and its neighbors
North Stonington borders 7 towns with climate data. January nights across them vary by 4.2°. Griswold has the coldest January nights (19°) and Preston the hottest July afternoons (83°). North Stonington’s January low is 20° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How North Stonington compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in North Stonington averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.8°). The shift is larger than in 97% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at North Stonington’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 18° to 37°. June is the most reliable, staying within 5°.
Common questions about North Stonington’s climate
What is the coldest month in North Stonington?
January, with a typical high of 38° and a low of 20°.
What is the hottest month in North Stonington?
July, with a typical high of 82° and a low of 62°. About 14 days a year reach 90°.
How much snow does North Stonington get?
About 38 inches in a normal winter, most of it in January.
When is the first frost in North Stonington?
In half of years the first 32° night comes by October 24, and the last spring frost by April 14.
What is the rainiest month in North Stonington?
October, with 4.6 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for North Stonington itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Jewett City, CT (11 mi, snow) and Norwich Public Utility Plt, CT (11 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.