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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 79°F, while the coldest is January averaging around 18°F at night. Precipitation is fairly even year-round, totalling about 36 inches. Winters bring significant snowfall (44 inches 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 (°F) | 32 | 34 | 41 | 54 | 66 | 75 | 79 | 79 | 72 | 60 | 48 | 37 |
| Avg temp (°F) | 25 | 26 | 33 | 44 | 56 | 65 | 70 | 70 | 63 | 52 | 41 | 31 |
| Avg low (°F) | 18 | 18 | 24 | 34 | 46 | 56 | 61 | 61 | 54 | 43 | 34 | 25 |
| Precipitation (in) | 3.0 | 2.2 | 2.6 | 3.3 | 3.3 | 3.2 | 3.4 | 3.1 | 4.0 | 4.1 | 3.7 | — |
| Snowfall (in) | 17.0 | 10.9 | 9.9 | 1.2 | — | — | 0.0 | — | — | 0.5 | 4.6 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 32 | 34 | 41 | 54 | 66 | 75 |
| Avg temp (°F) | 25 | 26 | 33 | 44 | 56 | 65 |
| Avg low (°F) | 18 | 18 | 24 | 34 | 46 | 56 |
| Precipitation (in) | 3.0 | 2.2 | 2.6 | 3.3 | 3.3 | 3.2 |
| Snowfall (in) | 17.0 | 10.9 | 9.9 | 1.2 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 79 | 72 | 60 | 48 | 37 |
| Avg temp (°F) | 70 | 70 | 63 | 52 | 41 | 31 |
| Avg low (°F) | 61 | 61 | 54 | 43 | 34 | 25 |
| Precipitation (in) | 3.4 | 3.1 | 4.0 | 4.1 | 3.7 | — |
| Snowfall (in) | 0.0 | — | — | 0.5 | 4.6 | — |
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 (mph) | 6.9 | 6.6 | 5.1 | 3.7 | 2.8 | 2.7 | 2.8 | 2.8 | 3.2 | 3.8 | 4.3 | 5.4 |
| 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 (mph) | 6.9 | 6.6 | 5.1 | 3.7 | 2.8 | 2.7 |
| 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 (mph) | 2.8 | 2.8 | 3.2 | 3.8 | 4.3 | 5.4 |
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.