Historical weather data, all-time temperature records, and monthly climate averages for Uniondale, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Uniondale lands right in the heart of spring's transition, with average highs of 55° and lows of 40° across 77 years of records. The date has a decent range of surprises — it hit 73° as recently as 2010, but dipped to a bitter 24° back in 1954. There's a 40% chance of rain today, though snow is essentially off the table.
Uniondale's weather history has some real extremes baked in — from a scorching 104° on July 3, 1966 to a brutal -2° on January 21, 1985, a swing of 106 degrees. The wettest single day on record dropped a staggering 8.05 inches on September 29, 2023, and the snowiest dumped 30.3 inches in the January 2016 blizzard.
Summer is peak season here, with the warmest week of the year (July 16–22) averaging highs of 85° and the wettest stretch following right on its heels in late July. Winters are cold but not brutal — January highs average just 39° — and the mildest shoulder months are May through October for anyone planning a visit.