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Grand Island, New York climate
Dfb Warm-summer humid continental
Grand Island has a strongly seasonal cool-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 26°C, while the coldest is January averaging around −8°C at night. Precipitation is fairly even year-round, totalling about 913 mm. Winters bring significant snowfall (112 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)Grand Island climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 1 | 5 | 12 | 19 | 24 | 26 | 26 | 22 | 16 | 9 | 3 |
| Avg temp (°C) | −4 | −4 | 0 | 7 | 13 | 19 | 21 | 21 | 17 | 11 | 5 | 0 |
| Avg low (°C) | −8 | −8 | −4 | 1 | 8 | 13 | 16 | 16 | 12 | 6 | 1 | −4 |
| Precipitation (mm) | 76 | 57 | 66 | 83 | 84 | 82 | 87 | 79 | 102 | 104 | 93 | — |
| Snowfall (cm) | 43 | 28 | 25 | 3 | — | — | 0 | — | — | 1 | 12 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 1 | 5 | 12 | 19 | 24 |
| Avg temp (°C) | −4 | −4 | 0 | 7 | 13 | 19 |
| Avg low (°C) | −8 | −8 | −4 | 1 | 8 | 13 |
| Precipitation (mm) | 76 | 57 | 66 | 83 | 84 | 82 |
| Snowfall (cm) | 43 | 28 | 25 | 3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 22 | 16 | 9 | 3 |
| Avg temp (°C) | 21 | 21 | 17 | 11 | 5 | 0 |
| Avg low (°C) | 16 | 16 | 12 | 6 | 1 | −4 |
| Precipitation (mm) | 87 | 79 | 102 | 104 | 93 | — |
| Snowfall (cm) | 0 | — | — | 1 | 12 | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 77 | 74 | 71 | 67 | 63 | 59 | 59 | 61 | 70 | 77 | 81 |
| Relative humidity (%) | 89 | 87 | 83 | 79 | 76 | 73 | 70 | 70 | 72 | 77 | 82 | 87 |
| Wind speed (km/h) | 11.1 | 10.7 | 8.1 | 6.0 | 4.5 | 4.3 | 4.5 | 4.5 | 5.1 | 6.0 | 6.9 | 8.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 77 | 74 | 71 | 67 | 63 |
| Relative humidity (%) | 89 | 87 | 83 | 79 | 76 | 73 |
| Wind speed (km/h) | 11.1 | 10.7 | 8.1 | 6.0 | 4.5 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 59 | 61 | 70 | 77 | 81 |
| Relative humidity (%) | 70 | 70 | 72 | 77 | 82 | 87 |
| Wind speed (km/h) | 4.5 | 4.5 | 5.1 | 6.0 | 6.9 | 8.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Fort Erie, a weather station, about 17 km from the city centre. The underlying daily records come from NOAA's global station network.
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.