Weather in New Haven in September
How warm is it in New Haven in September?
In September the typical daytime high in New Haven is 22.5 °C on average, from 25.1 °C at the start to 19.7 °C at the end of the month.
That is 3.9 °C cooler than in August and 6.1 °C warmer than in October.
The last 10 years were 1.3 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Norfolk (78 km), Ny City Cntrl Park (105 km) and Kingston (117 km); nearer ones count more.