New York, United States weather in September

Averages from 2021–2025 (150 days of record).

Average high: 77°F
Average low: 61°F
Rainy days: ~10 per month
Total precipitation: 5.5 in
Warmest recorded: 97°F
Coldest recorded: 49°F

Expect September days in New York, United States to top out around 77°F and cool to about 61°F overnight, with roughly 10 days of measurable rain across the month. In recent years September has ranged from 49°F to 97°F.

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Current New York, United States forecast → · Historical data by Open-Meteo (ERA5).