Avg high
25°C
Avg low
16°C
Rainfall
119 mm
Rain days
9.2
Sunshine
9.3 h/day
Daylight
12.3 h
What to pack for New York City in September
- t-shirts and light layers
- a light jacket for evenings
- a compact umbrella or rain shell — rain is frequent
Humidity averages 74%; max daily wind around 19 km/h.
How September compares
Best months in New York City: May–June & September–October. See the full best time to visit New York City guide.
New York City in September: the details
In September, New York City sees average daytime highs of 25°C (76°F) and overnight lows of 16°C (61°F). Rainfall totals roughly 119 mm across 9.2 rainy days, and the sun shines about 9.3 hours per day with 12.3 hours of daylight mid-month. Relative humidity averages 74%.
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for New York City, United States (40.71, -74.01) — see our methodology. Actual conditions vary year to year.
Where should you go next month?
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