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Valley Stream, New York climate
Cfa Humid subtropical
Valley Stream has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 30°C, while the coldest is January averaging around −2°C at night. Precipitation is fairly even year-round, totalling about 1150 mm. Winters bring significant snowfall (76 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Valley Stream climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 10 | 16 | 22 | 27 | 30 | 29 | 25 | 19 | 13 | 7 |
| Avg temp (°C) | 1 | 2 | 6 | 12 | 18 | 23 | 26 | 25 | 22 | 15 | 10 | 4 |
| Avg low (°C) | −2 | −1 | 2 | 8 | 13 | 19 | 22 | 22 | 18 | 12 | 6 | 2 |
| Precipitation (mm) | 83 | 74 | 102 | 98 | 91 | 102 | 109 | 112 | 99 | 97 | 80 | 104 |
| Snowfall (cm) | 22 | 25 | 14 | 1 | — | — | — | — | — | 0 | 1 | 13 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 10 | 16 | 22 | 27 |
| Avg temp (°C) | 1 | 2 | 6 | 12 | 18 | 23 |
| Avg low (°C) | −2 | −1 | 2 | 8 | 13 | 19 |
| Precipitation (mm) | 83 | 74 | 102 | 98 | 91 | 102 |
| Snowfall (cm) | 22 | 25 | 14 | 1 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 29 | 25 | 19 | 13 | 7 |
| Avg temp (°C) | 26 | 25 | 22 | 15 | 10 | 4 |
| Avg low (°C) | 22 | 22 | 18 | 12 | 6 | 2 |
| Precipitation (mm) | 109 | 112 | 99 | 97 | 80 | 104 |
| Snowfall (cm) | — | — | — | 0 | 1 | 13 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 69 | 65 | 62 | 60 | 61 | 57 | 53 | 50 | 51 | 55 | 62 | 68 |
| Relative humidity (%) | 87 | 85 | 83 | 80 | 79 | 78 | 73 | 72 | 74 | 77 | 81 | 86 |
| Wind speed (km/h) | 7.3 | 7.7 | 7.4 | 6.1 | 5.0 | 4.6 | 4.4 | 4.4 | 5.0 | 5.5 | 5.7 | 6.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 69 | 65 | 62 | 60 | 61 | 57 |
| Relative humidity (%) | 87 | 85 | 83 | 80 | 79 | 78 |
| Wind speed (km/h) | 7.3 | 7.7 | 7.4 | 6.1 | 5.0 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 50 | 51 | 55 | 62 | 68 |
| Relative humidity (%) | 73 | 72 | 74 | 77 | 81 | 86 |
| Wind speed (km/h) | 4.4 | 4.4 | 5.0 | 5.5 | 5.7 | 6.3 |
30-year delta table (1991–2020 minus 1981–2010, °F)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Δ Max temp | +0.9 | +0.5 | +0.1 | +0.4 | +0.6 | +0.6 | +1.1 | +0.8 | +0.9 | +0.8 | +0.3 | +1.1 |
| Δ Avg temp | +1.5 | +1.0 | +0.9 | +0.9 | +1.2 | +1.2 | +1.8 | +1.4 | +1.7 | +1.5 | +0.8 | +1.8 |
| Δ Min temp | +2.0 | +1.4 | +1.6 | +1.6 | +1.8 | +1.9 | +2.4 | +2.1 | +2.5 | +2.3 | +1.4 | +2.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Δ Max temp | +0.9 | +0.5 | +0.1 | +0.4 | +0.6 | +0.6 |
| Δ Avg temp | +1.5 | +1.0 | +0.9 | +0.9 | +1.2 | +1.2 |
| Δ Min temp | +2.0 | +1.4 | +1.6 | +1.6 | +1.8 | +1.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Δ Max temp | +1.1 | +0.8 | +0.9 | +0.8 | +0.3 | +1.1 |
| Δ Avg temp | +1.8 | +1.4 | +1.7 | +1.5 | +0.8 | +1.8 |
| Δ Min temp | +2.4 | +2.1 | +2.5 | +2.3 | +1.4 | +2.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Laguardia AP (NOAA GHCN station USW00014732), about 19 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.