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Shirley, New York climate
Cfa Humid subtropical
Shirley has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 28°C, while the coldest is January averaging around −5°C at night. Precipitation is fairly even year-round, totalling about 1124 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsShirley climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 5 | 9 | 14 | 20 | 25 | 28 | 27 | 24 | 18 | 12 | 7 |
| Avg temp (°C) | 0 | 0 | 4 | 9 | 15 | 20 | 23 | 23 | 19 | 13 | 7 | 3 |
| Avg low (°C) | −5 | −4 | −1 | 4 | 10 | 15 | 19 | 18 | 14 | 8 | 3 | −2 |
| Precipitation (mm) | 75 | 79 | 117 | 103 | 88 | 94 | 82 | 77 | 99 | 101 | 93 | 114 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 5 | 9 | 14 | 20 | 25 |
| Avg temp (°C) | 0 | 0 | 4 | 9 | 15 | 20 |
| Avg low (°C) | −5 | −4 | −1 | 4 | 10 | 15 |
| Precipitation (mm) | 75 | 79 | 117 | 103 | 88 | 94 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 27 | 24 | 18 | 12 | 7 |
| Avg temp (°C) | 23 | 23 | 19 | 13 | 7 | 3 |
| Avg low (°C) | 19 | 18 | 14 | 8 | 3 | −2 |
| Precipitation (mm) | 82 | 77 | 99 | 101 | 93 | 114 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 10 | 12 | 13 | 10 | 9 | 10 | 10 | 12 | 10 | 12 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.0 | 1 | 4 | 2 | 0.1 | — | — | — |
| Days with low ≤ 0°C (days) | 23 | 22 | 16 | 5 | 0.2 | — | — | — | — | 2 | 10 | 21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 10 | 12 | 13 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.0 | 1 |
| Days with low ≤ 0°C (days) | 23 | 22 | 16 | 5 | 0.2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 10 | 10 | 12 | 10 | 12 |
| Days with high ≥ 32°C (days) | 4 | 2 | 0.1 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 2 | 10 | 21 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 66 | 63 | 61 | 62 | 58 | 53 | 49 | 52 | 55 | 64 | 70 |
| Clear days (≤ 30% cloud) | 3 | 4 | 5 | 6 | 6 | 7 | 9 | 11 | 10 | 9 | 5 | 3 |
| Partly cloudy days (30–70%) | 10 | 10 | 11 | 10 | 11 | 11 | 12 | 11 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 18 | 15 | 15 | 14 | 14 | 12 | 10 | 9 | 11 | 13 | 15 | 17 |
| Relative humidity (%) | 84 | 83 | 82 | 80 | 81 | 81 | 77 | 76 | 76 | 77 | 79 | 82 |
| Wind speed (m/s) | 3.7 | 3.4 | 3.1 | 2.5 | 2.1 | 2.0 | 1.9 | 2.1 | 2.5 | 3.0 | 3.2 | 3.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 66 | 63 | 61 | 62 | 58 |
| Clear days (≤ 30% cloud) | 3 | 4 | 5 | 6 | 6 | 7 |
| Partly cloudy days (30–70%) | 10 | 10 | 11 | 10 | 11 | 11 |
| Cloudy days (≥ 70%) | 18 | 15 | 15 | 14 | 14 | 12 |
| Relative humidity (%) | 84 | 83 | 82 | 80 | 81 | 81 |
| Wind speed (m/s) | 3.7 | 3.4 | 3.1 | 2.5 | 2.1 | 2.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 49 | 52 | 55 | 64 | 70 |
| Clear days (≤ 30% cloud) | 9 | 11 | 10 | 9 | 5 | 3 |
| Partly cloudy days (30–70%) | 12 | 11 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 10 | 9 | 11 | 13 | 15 | 17 |
| Relative humidity (%) | 77 | 76 | 76 | 77 | 79 | 82 |
| Wind speed (m/s) | 1.9 | 2.1 | 2.5 | 3.0 | 3.2 | 3.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Shirley Brookhaven AP (NOAA GHCN station USW00054790), about 2 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.