The late-September warm spell is over. Following yesterday's cold front passage the temperature dipped to 55 degrees in Central Park this morning for our coolest start to the day in almost three weeks. The temperature over the last ten days has been, on average, 11 degrees warmer than normal. This afternoon's high will be near 70, which is the normal high for the day.
Tomorrow's forecast is rather complicated but it boils down to an upper level disturbance bringing us a mostly cloudy day with a chance of showers in the city and a much better chance of showers, and possibly even a thunderstorm, toward the eastern end of Long Island. The overcast skies will keep Saturday's high to the mid 60s in the city. Sunday will be a much better day for outdoor activities as the sun should return and we'll see a high in the upper 60s.
Warm weather is not gone for good just yet as it looks like a broad ridge of high pressure will be setting up over the eastern half of the country for much of early October. That should allow the temperature to rebound into the mid 70s early next week and maybe even reaching the upper 70s by late in the week.