Port Chester, NY climate
Port Chester has chilly, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 24°, and about 33 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Port Chester feels like
Winter
Spring
Summer
Fall
Port Chester 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 | 39° | 24° | 3.3" | 9.4" | 11 | 13 | 23° – 38° |
| February | 42° | 25° | 2.8" | 10.9" | 9 | 13 | 21° – 39° |
| March | 49° | 32° | 4.0" | 5.8" | 11 | 7 | 35° – 49° |
| April | 61° | 41° | 4.1" | 0.7" | 13 | 0 | 47° – 56° |
| May | 71° | 51° | 3.8" | 0 | 12 | 0 | 57° – 66° |
| June | 80° | 60° | 4.3" | 0 | 12 | 0 | 67° – 73° |
| July | 85° | 66° | 4.4" | 0 | 10 | 0 | 70° – 79° |
| August | 83° | 65° | 4.1" | 0 | 9 | 0 | 70° – 78° |
| September | 76° | 58° | 4.5" | 0 | 9 | 0 | 64° – 71° |
| October | 65° | 46° | 4.4" | 0 | 9 | 0 | 52° – 63° |
| November | 54° | 37° | 3.5" | 0.3" | 10 | 0 | 41° – 50° |
| December | 44° | 29° | 4.0" | 5.6" | 11 | 7 | 30° – 48° |
| Year | 62° | 44° | 47.2" | 32.7" | 124 | 39 |
“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 Port Chester
Port Chester gets 47 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 124 days a year. Snow covers the ground about 39 days of the year.
About 200 frost-free days a year
In half of years the last 32° night comes by April 12 and the first one by October 31. That leaves about 200 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Port Chester
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Port Chester, 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.
Port Chester and its neighbors
Port Chester borders 4 towns with climate data. January nights across them vary by 2.4°. Greenwich has the coldest January nights (23°) and Rye the hottest July afternoons (85°). Port Chester’s January low is 24° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Port Chester 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 Port Chester averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.7°). The shift is larger than in 97% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Port Chester’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 Port Chester’s climate
What is the coldest month in Port Chester?
January, with a typical high of 39° and a low of 24°.
What is the hottest month in Port Chester?
July, with a typical high of 85° and a low of 66°. About 10 days a year reach 90°.
How much snow does Port Chester get?
About 33 inches in a normal winter, most of it in February.
When is the first frost in Port Chester?
In half of years the first 32° night comes by October 31, and the last spring frost by April 12.
What is the rainiest month in Port Chester?
September, with 4.5 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Port Chester itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Dobbs Ferry-ardsley, NY (9 mi, snow) and Westchester Co Airport, NY (5 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.