Seaford, NY climate
Seaford has chilly winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 26°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade12° warmer than normal today. The forecast high is 82°, and a typical Oct 2 in Seaford peaks around 70°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Seaford feels like
Winter
Spring
Summer
Fall
Seaford 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 | 40° | 26° | 3.3" | 5.7" | 14 | 24° – 40° |
| February | 43° | 27° | 2.9" | 7.6" | 11 | 23° – 40° |
| March | 49° | 33° | 4.2" | 4.8" | 14 | 37° – 49° |
| April | 60° | 42° | 3.8" | 1.0" | 13 | 47° – 55° |
| May | 69° | 51° | 3.4" | 0 | 16 | 56° – 65° |
| June | 79° | 61° | 4.0" | 0 | 13 | 67° – 74° |
| July | 84° | 67° | 3.6" | 0 | 11 | 70° – 80° |
| August | 83° | 66° | 4.1" | 0 | 11 | 70° – 78° |
| September | 76° | 59° | 3.8" | 0 | 10 | 65° – 72° |
| October | 65° | 48° | 3.9" | 0 | 12 | 52° – 63° |
| November | 55° | 39° | 3.3" | 0.2" | 13 | 41° – 51° |
| December | 45° | 31° | 4.2" | 6.2" | 14 | 31° – 50° |
| Year | 62° | 46° | 44.4" | 25.5" | 152 |
“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 Seaford
Seaford gets 44 inches of rain and melted snow a year. December is the wettest month and February the driest. Rain or snow falls on about 152 days a year.
About 221 frost-free days a year
In half of years the last 32° night comes by April 3 and the first one by November 11. That leaves about 221 frost-free days for gardens, longer than 82% of U.S. towns.
Heating and cooling a home in Seaford
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Seaford, 80% of that work is heating and 20% 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.
Seaford and its neighbors
Seaford borders 5 towns with climate data. January nights across them vary by 2.6°. Oyster Bay has the coldest January nights (24°) and Wantagh the hottest July afternoons (85°). Seaford’s January low is 26° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Seaford 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 Seaford averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.6°). The shift is larger than in 98% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Seaford’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 31° to 50°. September is the most reliable, staying within 7°.
Common questions about Seaford’s climate
What is the coldest month in Seaford?
January, with a typical high of 40° and a low of 26°.
What is the hottest month in Seaford?
July, with a typical high of 84° and a low of 67°. About 9 days a year reach 90°.
How much snow does Seaford get?
About 26 inches in a normal winter, most of it in February.
When is the first frost in Seaford?
In half of years the first 32° night comes by November 11, and the last spring frost by April 3.
What is the rainiest month in Seaford?
December, with 4.2 inches of rain and melted snow. The year totals 44 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Seaford itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Oceanside, NY (7 mi, snow) and Wantagh Cedar Creek, NY (1 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.