Valley Stream, NY climate
Valley Stream has chilly winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 27°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Valley Stream feels like
Winter
Spring
Summer
Fall
Valley Stream 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° | 27° | 3.4" | 7.5" | 11 | 6 | 25° – 40° |
| February | 43° | 28° | 3.0" | 8.6" | 10 | 7 | 24° – 41° |
| March | 49° | 34° | 4.2" | 4.3" | 11 | 3 | 37° – 49° |
| April | 60° | 43° | 3.8" | 0.6" | 11 | 0 | 47° – 56° |
| May | 69° | 53° | 3.6" | 0 | 12 | 0 | 57° – 66° |
| June | 79° | 62° | 3.9" | 0 | 11 | 0 | 67° – 75° |
| July | 84° | 69° | 3.9" | 0 | 9 | 0 | 72° – 81° |
| August | 83° | 68° | 4.2" | 0 | 9 | 0 | 72° – 79° |
| September | 76° | 61° | 3.9" | 0 | 8 | 0 | 66° – 73° |
| October | 65° | 50° | 4.0" | 0 | 9 | 0 | 53° – 64° |
| November | 55° | 40° | 3.3" | 0.4" | 9 | 0 | 42° – 52° |
| December | 46° | 32° | 4.3" | 4.5" | 11 | 3 | 32° – 50° |
| Year | 62° | 47° | 45.5" | 25.9" | 121 | 20 |
“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 Valley Stream
Valley Stream gets 45 inches of rain and melted snow a year. December is the wettest month and February the driest. Rain or snow falls on about 121 days a year. Snow covers the ground about 20 days of the year.
About 226 frost-free days a year
In half of years the last 32° night comes by April 2 and the first one by November 14. That leaves about 226 frost-free days for gardens, longer than 84% of U.S. towns.
Heating and cooling a home in Valley Stream
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Valley Stream, 83% of that work is heating and 17% 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.
Valley Stream and its neighbors
Valley Stream borders 4 towns with climate data. January nights across them vary by 1.3°. Malverne has the coldest January nights (26°) and New York the hottest July afternoons (85°). Valley Stream’s January low is 27° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Valley Stream 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 Valley Stream averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.5°). The shift is larger than in 96% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Valley Stream’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 32° to 50°. September is the most reliable, staying within 7°.
Common questions about Valley Stream’s climate
What is the coldest month in Valley Stream?
January, with a typical high of 40° and a low of 27°.
What is the hottest month in Valley Stream?
July, with a typical high of 84° and a low of 69°. About 11 days a year reach 90°.
How much snow does Valley Stream get?
About 26 inches in a normal winter, most of it in February.
When is the first frost in Valley Stream?
In half of years the first 32° night comes by November 14, and the last spring frost by April 2.
What is the rainiest month in Valley Stream?
December, with 4.3 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Valley Stream itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at New York Jfk Intl Airport, NY (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.