Cornwall-on-Hudson, NY climate
Cornwall-on-Hudson has chilly, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 19°, and about 36 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cornwall-on-Hudson feels like
Winter
Spring
Summer
Fall
Cornwall-on-Hudson 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 | 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 | 12 | 55° – 66° |
| June | 80° | 58° | 4.4" | 0 | 11 | 66° – 73° |
| July | 85° | 64° | 4.3" | 0 | 10 | 69° – 78° |
| August | 83° | 62° | 4.4" | 0 | 10 | 68° – 76° |
| September | 76° | 54° | 4.4" | 0 | 8 | 62° – 70° |
| October | 64° | 43° | 4.5" | 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 |
“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 Cornwall-on-Hudson
Cornwall-on-Hudson gets 46 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 118 days a year.
About 204 frost-free days a year
In half of years the last 32° night comes by April 10 and the first one by November 1. That leaves about 204 frost-free days for gardens, longer than 75% of U.S. towns.
Heating and cooling a home in Cornwall-on-Hudson
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cornwall-on-Hudson, 86% of that work is heating and 14% 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.
Cornwall-on-Hudson and its neighbors
Cornwall-on-Hudson borders 1 town with climate data. January nights across them vary by 0.0°. Firthcliffe has both the coldest January nights (19°) and the hottest July afternoons (85°). Cornwall-on-Hudson’s January low is 19° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Cornwall-on-Hudson 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 Cornwall-on-Hudson averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.7°). The shift is larger than in 95% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cornwall-on-Hudson’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 17° to 36°. June is the most reliable, staying within 6°.
Common questions about Cornwall-on-Hudson’s climate
What is the coldest month in Cornwall-on-Hudson?
January, with a typical high of 36° and a low of 19°.
What is the hottest month in Cornwall-on-Hudson?
July, with a typical high of 85° and a low of 64°. About 18 days a year reach 90°.
How much snow does Cornwall-on-Hudson get?
About 36 inches in a normal winter, most of it in January.
When is the first frost in Cornwall-on-Hudson?
In half of years the first 32° night comes by November 1, and the last spring frost by April 10.
What is the rainiest month in Cornwall-on-Hudson?
October, with 4.5 inches of rain and melted snow. The year totals 46 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cornwall-on-Hudson itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at West Point, NY (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.