Spring sizzle eyes May record books as summer-like heat invades the East
Let's see what the prediction markets, brought to you by Kalshi, are saying about the temperatures in Philadelphia and New York City on Tuesday.
Millions under heat alerts as the hottest May temperatures in decades arrive
Summer-like heat has taken hold across the East, abruptly banishing the stubborn chill that has gripped the region since the start of the month. Many cities along the I-95 corridor are seeing their first heat alerts of 2026. These Heat Advisories extend from Philadelphia northward to New York City, Providence, Rhode Island, and Boston.
The East is baking under sweltering spring heat, with temperatures soaring toward record territory for the month of May ahead of summer.
Summer-like temperatures have over 32 million under heat alerts extending from Philadelphia north to include New York City, Providence and Boston – the first alerts of the year for the I-95 corridor.
With both New York City and Philadelphia under a Heat Advisory in the month of May since 2022, let's take a look at how trading on prediction markets for two of the Northeast's most populated cities.
With sweltering heat reaching the mid 90s in the Big Apple, Tuesday's low temperature is forecast to be from the mid 70s to 80 degrees.
In Philadelphia, the lowest temperature forecast is closer to 70 degrees.
While low temperatures are in line for the spring, it's the summer-like heat that's making headlines.
If an Extreme Heat Warning is issued, it would mark the first time since May 2012 that both New York City and Philadelphia have been placed under one simultaneously.
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Washington D.C., and Philadelphia have only scraped the 80-degree mark twice this May, while New York City has managed it just once – and that is in the process of changing.
These major cities and metro-areas are staring down up to four consecutive days in the 80s into Wednesday.
A man takes in the sun in Washington Square Park in New York on May 19, 2026 as the New York metropolitan area is under an air quality alert with temperatures in the low 90s.
(TIMOTHY A. CLARY / AFP via Getty Images)
The spring heat is eyeing the record-books.
This will likely be the first official heat wave (3 consecutive days of 90 degrees or higher) of the season across the Northeast, including Philadelphia, New York City and Baltimore, which are currently forecast to reach the 90s on Monday and stay there through Wednesday.
If New York City does eclipse 90 degrees Monday through Wednesday, it would be the first time with three consecutive days surpassing 90 degrees in the month of May since May 29 to 31, 1987.
People play in water sprinklers in the Battery amid a heat advisory on May 19, 2026 in New York City. The National Weather Service issued a heat advisory for NYC and New Jersey, as temperatures are expected to reach into the 90s, and is expected to continue until 8 p.m. Wednesday.
(Michael M. Santiago/Getty Images / Getty Images)
The sweltering heat won't stick around for long.
By the end of the workweek, a lurking cold front will send temperatures crashing back down into the comfortable 60s and 70s, proving that while summer is making an early cameo, spring isn't quite done yet.