West Hampton Dunes, NY climate
West Hampton Dunes has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 24°, and about 32 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in West Hampton Dunes feels like
Winter
Spring
Summer
Fall
West Hampton Dunes 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 40° | 24° | 3.5" | 10.3" | 11 | 7 | 24° – 39° |
| February | 41° | 25° | 3.2" | 9.4" | 10 | 9 | 21° – 39° |
| March | 48° | 31° | 4.5" | 6.5" | 11 | 4 | 34° – 47° |
| April | 57° | 40° | 4.0" | 0.6" | 11 | 0 | 45° – 53° |
| May | 67° | 49° | 3.3" | 0 | 12 | 0 | 54° – 62° |
| June | 76° | 59° | 3.9" | 0 | 10 | 0 | 64° – 71° |
| July | 82° | 66° | 3.0" | 0 | 9 | 0 | 69° – 77° |
| August | 81° | 65° | 3.7" | 0 | 9 | 0 | 69° – 76° |
| September | 74° | 58° | 3.8" | 0 | 9 | 0 | 63° – 70° |
| October | 64° | 47° | 4.3" | 0 | 9 | 0 | 52° – 61° |
| November | 54° | 38° | 3.6" | 0.5" | 10 | 0 | 41° – 50° |
| December | 45° | 30° | 4.6" | 4.5" | 12 | 3 | 30° – 48° |
| Year | 61° | 44° | 45.3" | 31.8" | 122 | 23 |
“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 West Hampton Dunes
West Hampton Dunes gets 45 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 122 days a year. Snow covers the ground about 23 days of the year.
About 193 frost-free days a year
In half of years the last 32° night comes by April 18 and the first one by October 28. That leaves about 193 frost-free days for gardens, longer than 67% of U.S. towns.
Heating and cooling a home in West Hampton Dunes
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In West Hampton Dunes, 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.
West Hampton Dunes and its neighbors
West Hampton Dunes borders 2 towns with climate data. January nights across them vary by 1.4°. Brookhaven has both the coldest January nights (23°) and the hottest July afternoons (83°). West Hampton Dunes’s January low is 24° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How West Hampton Dunes 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 West Hampton Dunes averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.5°). The shift is larger than in 97% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at West Hampton Dunes’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 21° to 39°. June is the most reliable, staying within 6°.
Common questions about West Hampton Dunes’s climate
What is the coldest month in West Hampton Dunes?
January, with a typical high of 40° and a low of 24°.
What is the hottest month in West Hampton Dunes?
July, with a typical high of 82° and a low of 66°. About 7 days a year reach 90°.
How much snow does West Hampton Dunes get?
About 32 inches in a normal winter, most of it in January.
When is the first frost in West Hampton Dunes?
In half of years the first 32° night comes by October 28, and the last spring frost by April 18.
What is the rainiest month in West Hampton Dunes?
December, with 4.6 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for West Hampton Dunes itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Islip Li Macarthur Airport, NY (20 mi, snow) and Shirley Brookhaven Airport, NY (9 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.