Updated 9/25 morning with new forecast update
An unseasonably cool air mass remains in place over the area, with Central Park reaching 47 degrees this morning, the coolest September low since 2000. Temperatures will slowly moderate into the low-mid 70s through the week and the weekend with dry conditions persisting, with the next rain event expected on Monday as the next frontal system affects the area.
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Monday, September 23 Observations:
With a strong cool air mass in place, chilly temperatures were observed again across the area, with morning lows falling to 39 degrees in Sussex, NJ and 50 degrees in Central Park, the second time this has occurred this month. Mostly sunny skies were observed during the day with highs climbing into the low to mid 60s inland and the mid to upper 60s for the rest of the area. The highest temperature was 68 degrees in Teterboro, NJ and JFK airport, and the lowest high temperature was 61 degrees in Port Jervis, NY.
Today – Saturday: Slowly Warming Up
As previously mentioned, Central Park fell to 47 degrees this morning, making it the coolest September low temperature since 2000, when temperatures reached 46 degrees on 9/27 and 43 degrees on 9/29. Central Park last fell below 50 degrees in September of 2009, with a low of 49 at the very end of the month. Other notable low temperatures across the area include 33 degrees in Sussex, NJ and 37 degrees in Westhampton Beach, NY. Mainly sunny skies are expected again today with highs rising into the upper 60s to low 70s across the area, with clear skies again tonight and lows a few degrees warmer than those of this morning.
On Wednesday, a shortwave trough will pass south of the area, which will help to keep the cool air mass in place through the late week; as this shortwave will stay south of the area, mostly sunny skies are expected to continue over the area with temperatures peaking in the upper 60s-low 70s for most locations and the low-mid 70s near NYC. Thursday and Friday may be a degree or two cooler across the area with mostly sunny skies expected to continue, with a slight warm up on Saturday as temperatures reach the low to mid 70s.