Historical weather data, all-time temperature records, and monthly climate averages for Grand Island, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Grand Island is a coin-flip kind of day — there's a 49% chance of precipitation and a 21% chance of snow, so don't put the winter coat away just yet. Historically, the date swings hard: it's hit 69° (1997) and bottomed out at 15° (2016), bracketing today's average high of 49°.
Grand Island has seen it all, from a scorching 100° on July 10, 2020 to a brutal -15° on Valentine's Day 2016 — a 115-degree spread that speaks to Western New York's no-nonsense climate. The area's Lake Erie influence also packs a punch in winter, as evidenced by a jaw-dropping 38 inches of snow in a single day on Christmas 2022.
Summer is short and sweet here, peaking the week of July 16–22 with average highs of 83° before the calendar turns quickly toward fall. Winters are cold and long — January and February highs hover in the low-to-mid 30s — so the comfortable window really runs May through September. Late September is actually the wettest stretch of the year, averaging over an inch of precipitation in a week, so pack accordingly for fall travel.