An unusually wet May for Long Island
LONG ISLAND, New York — This May has turned out to be unseasonably wet, with more rain still on the way, capping off a month that already surpassed typical precipitation totals for this time of year. As of Wednesday, the National Weather Service had recorded 3.9 inches of rain at MacArthur Airport in Ronkonkoma, marking a notable increase of 1.08 inches above the average May rainfall of 2.81 inches.
According to Joe Pollina, meteorologist for the NWS, the last fully dry weekend on Long Island dates back to April 19–20. “It has been relatively unsettled as of late,” he commented, reflecting on the string of wet weekends experienced this spring.
Wider state trends and shifting averages
The excessive precipitation isn’t isolated to Long Island. Other parts of New York State, including the capital region, have also seen consistent rainfall. Reports from the State Weather Risk Communication Center at the University at Albany highlight that the Albany area hasn’t had a fully dry weekend since November 16–17.
Still, the frequent showers have played a crucial role in correcting a rainfall deficit. From January 1 to now, Long Island has received 14.95 inches of rain — still below the seasonal norm of 18.33 inches. Just a month ago, the area was more than 3 inches below average. Pollina emphasized, “This is well-needed rainfall.”
Warmer temperatures despite clouds and rain
Interestingly, despite the persistent rain, May temperatures have run 2.4 degrees above normal. May 2 and 3 brought a burst of early summer heat, reaching highs of 84°F and 87°F (29°C and 31°C), respectively. Subsequent periods, including May 10–13 and May 15–18, also recorded normal to above-average temperatures.
However, the recent string of rainy days, especially from May 19 through Memorial Day, contributed to below-average daytime highs. Pollina added, “A lot of people think we’re in spring, we should see temperatures in the 80s — but not on Long Island. We don’t see 80-degree temps until June.”
Looking ahead: Summer showers likely
As June approaches, the Climate Prediction Center indicates that Long Island has a 33% to 40% chance of seeing above-average rainfall through June, July, and August. While the current rainy stretch is expected to ease off at the end of May, Wednesday night comes with a 90–100% chance of rain, tapering throughout Thursday.
Friday night may bring a slight chance of precipitation, while Saturday morning and afternoon hold a 50% to 60% likelihood of showers. By Sunday, June 1, conditions are expected to dry out, with sunshine returning and highs reaching 70°F (21°C).
Still, as Pollina reminds residents, “It won’t be a total washout.” Keep the umbrella handy, though — this summer may continue the wet pattern that’s defined May on Long Island.
