Photo: Pi.1415926535 · CC BY-SA 4.0Cornwall Bridge has colder winter nights than 84% of U.S. towns
Peak summer warmth arrives in July, with afternoons near 82°. By July afternoons alone, it runs cooler than 83% of U.S. towns. December has warmed most since 1901–2000, part of a 1.9° rise. Warm coats and heating bills mark the months from October to April, when means dip under 50°.
A year in Cornwall Bridge at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cornwall Bridge’s climate
Compared with towns across the U.S., with Cornwall Bridge’s place in Connecticut beside it.
What a year in Cornwall Bridge feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 146 frost-free days a year
In half of years the last 32° night comes by May 11 and the first by October 4. Frost and day counts come from NOAA’s station at Falls Village, CT, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Cornwall Bridge’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −7°. 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 59 inches of snow a winter
Snow, measured at Bakersville, CT, falls mostly in February. Precipitation (rain plus melted snow) adds up to 48 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 143 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Cornwall Bridge
92% 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 Falls Village, CT.
Living with Cornwall Bridge’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
146 frost-free days in zone 6a. The last frost comes by May 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 4.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 0.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Cornwall Bridge from natural hazards, river flooding is the largest share (84%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cornwall Bridge and its neighbors
Every town next door is within a degree of Cornwall Bridge in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Cornwall Bridge’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 |
|---|---|---|---|---|
| Cornwall Bridge, CT | 15° | 82° | 48" | 59" |
| South Berwick, ME | 14° | 82° | 48" | 56" |
| Stratham, NH | 16° | 81° | 48" | 65" |
| St. Marys, PA | 16° | 80° | 46" | 53" |
| Allegany, NY | 15° | 81° | 43" | 65" |
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 Cornwall Bridge averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.4°).
A bigger shift than in 84% 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 Cornwall Bridge compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cornwall Bridge’s place among Connecticut’s.
Cornwall Bridge weather by month
Highs, lows and precipitation from NOAA’s grid at Cornwall Bridge’s center; snow, wet days and snow on the ground from Bakersville, CT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 15° | 3.4" | 13.1" | 13 | 23 | 15° – 31° |
| February | 37° | 17° | 2.8" | 15.8" | 10 | 21 | 13° – 33° |
| March | 45° | 24° | 3.7" | 12.7" | 12 | 17 | 27° – 46° |
| April | 58° | 34° | 3.6" | 2.6" | 13 | 2 | 41° – 50° |
| May | 69° | 45° | 3.9" | 0.0" | 14 | 0 | 52° – 63° |
| June | 77° | 54° | 4.6" | 0.0" | 13 | 0 | 63° – 69° |
| July | 82° | 59° | 4.5" | 0.0" | 12 | 0 | 66° – 74° |
| August | 80° | 57° | 4.4" | 0.0" | 11 | 0 | 65° – 72° |
| September | 72° | 50° | 4.7" | 0.0" | 11 | 0 | 58° – 66° |
| October | 61° | 39° | 4.7" | 0.3" | 12 | 0 | 45° – 56° |
| November | 49° | 30° | 3.6" | 2.6" | 11 | 2 | 35° – 44° |
| December | 38° | 21° | 4.1" | 12.0" | 13 | 15 | 23° – 42° |
| Year | 58° | 37° | 48.0" | 59.1" | 143 | 80 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 13° to 33°. June is the most reliable, staying within 6°.
Where Cornwall Bridge’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 Cornwall Bridge’s center.
- Snow: Bakersville, CT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Falls Village, CT, 10 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 Cornwall Bridge’s climate
What is the weather like in Cornwall Bridge?
A typical July afternoon reaches 82°, a January night drops to 15°, and about 59 inches of snow falls in a normal winter. Colder January nights than 84% of U.S. towns; cooler July afternoons than 83% of U.S. towns.
How cold does it get in Cornwall Bridge in winter?
January nights average 15°. About 156 nights a year reach 32° or below and 8 reach 0° or below. In the coldest January of the last 30 years the month averaged 15°.
How much snow does Cornwall Bridge get?
About 59 inches in a normal winter at Bakersville, CT, most of it in February, with snow on the ground about 80 days a year.
How hot does it get in Cornwall Bridge?
July, with a typical high of 82° and a low of 59°. About 12 days a year reach 90° (Falls Village, CT).
When is the first and last frost in Cornwall Bridge?
In half of years the last spring frost (32°) comes by May 11 and the first fall frost by October 4, about 146 frost-free days, at Falls Village, CT.
What growing zone is Cornwall Bridge in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −7°.
What is the best time of year to visit Cornwall Bridge?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Cornwall Bridge getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cornwall Bridge.
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.