For weather, Cornwall-on-Hudson is about as ordinary as U.S. towns get
On a normal July day the thermometer tops out near 85°. Precipitation is plentiful here, more than falls on 66% of U.S. towns. December has warmed most since 1901–2000, part of a 2.0° rise. Radiators earn their keep from November to April, the months that average under 50°.
A year in Cornwall-on-Hudson at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cornwall-on-Hudson’s climate
Compared with towns across the U.S., with Cornwall-on-Hudson’s place in New York beside it.
What a year in Cornwall-on-Hudson feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 204 frost-free days a year
In half of years the last 32° night comes by April 10 and the first by November 1. Frost and day counts come from NOAA’s station at West Point, NY, 4 miles from the town’s center, 120 ft higher.
The 2023 USDA map puts Cornwall-on-Hudson’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −2°. 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 36 inches of snow a winter
Snow, measured at West Point, NY, falls mostly in January. Precipitation (rain plus melted snow) adds up to 46 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 118 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Cornwall-on-Hudson
86% 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 West Point, NY.
Living with Cornwall-on-Hudson’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
204 frost-free days in zone 6b. The last frost comes by Apr 10 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 1.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October. 2.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Cornwall-on-Hudson from natural hazards, river flooding is the largest share (69%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cornwall-on-Hudson and its neighbors
Every town next door is within a degree of Cornwall-on-Hudson in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Cornwall-on-Hudson’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-on-Hudson, NY | 19° | 85° | 46" | 36" |
| Kenmar, PA | 19° | 85° | 44" | 36" |
| Manchester, MD | 22° | 84° | 47" | 34" |
| Cochituate, MA | 17° | 84° | 47" | 46" |
| Cumberland, IN | 20° | 85° | 44" | 27" |
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-on-Hudson averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 91% 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-on-Hudson compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cornwall-on-Hudson’s place among New York’s.
Cornwall-on-Hudson weather by month
Highs, lows and precipitation from NOAA’s grid at Cornwall-on-Hudson’s center; snow, wet days and snow on the ground from West Point, NY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 36° | 19° | 3.2" | 11.1" | 10 | 18° – 34° |
| February | 39° | 21° | 2.6" | 7.1" | 8 | 17° – 36° |
| March | 48° | 28° | 3.7" | 9.6" | 9 | 31° – 48° |
| April | 61° | 38° | 3.7" | 0.4" | 11 | 45° – 54° |
| May | 71° | 49° | 3.7" | 0.0" | 12 | 55° – 66° |
| June | 80° | 58° | 4.4" | 0.0" | 11 | 66° – 73° |
| July | 85° | 64° | 4.3" | 0.0" | 10 | 69° – 78° |
| August | 83° | 62° | 4.4" | 0.0" | 10 | 68° – 76° |
| September | 76° | 54° | 4.4" | 0.0" | 8 | 62° – 70° |
| October | 64° | 43° | 4.5" | 0.0" | 10 | 49° – 60° |
| November | 52° | 33° | 3.5" | 0.5" | 9 | 38° – 47° |
| December | 41° | 25° | 3.9" | 7.0" | 10 | 26° – 44° |
| Year | 61° | 41° | 46.3" | 35.7" | 118 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 17° to 36°. June is the most reliable, staying within 6°.
Where Cornwall-on-Hudson’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-on-Hudson’s center.
- Snow: West Point, NY.
- Frost, freezing nights, 90° and 100° days, heating and cooling: West Point, NY, 4 miles from the town’s center, 120 ft higher; 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-on-Hudson’s climate
What is the weather like in Cornwall-on-Hudson?
A typical July afternoon reaches 85°, a January night drops to 19°, and about 36 inches of snow falls in a normal winter. Colder January nights than 65% of U.S. towns; cooler July afternoons than 52% of U.S. towns.
How cold does it get in Cornwall-on-Hudson in winter?
January nights average 19°. About 110 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Cornwall-on-Hudson get?
About 36 inches in a normal winter at West Point, NY, most of it in January.
How hot does it get in Cornwall-on-Hudson?
July, with a typical high of 85° and a low of 64°. About 18 days a year reach 90° (West Point, NY).
When is the first and last frost in Cornwall-on-Hudson?
In half of years the last spring frost (32°) comes by April 10 and the first fall frost by November 1, about 204 frost-free days, at West Point, NY.
What growing zone is Cornwall-on-Hudson in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −2°.
What is the best time of year to visit Cornwall-on-Hudson?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Cornwall-on-Hudson getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 91% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cornwall-on-Hudson.
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.