New York City weather in September
September is one of the best months to visit New York City: highs of 23°C (74°F) and about 97 mm (3.8 in) of rain on average. Nights average 18°C (64°F) and cloud cover 51% (NASA POWER, 2001–2025 averages). The sea averages 22°C (72°F). It is the 2nd driest month of the year and the 3rd warmest. Compared with August, it is cooler and about as wet; October brings highs of 18°C (64°F) and 124 mm (4.9 in) of rain.
Is September a good time to visit New York City?
best month Weather score 74/100.
Yes. September is one of the best months for weather in New York City.
Does it rain a lot in New York City in September?
Some rain is normal: about 97 mm (3.8 in) falls in an average September. It is the 2nd driest month of the year.
How warm is New York City in September?
Days average 23°C (74°F) and nights 18°C (64°F).
New York City weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 4°C (38°F) | -1°C (29°F) | 99 mm | 62% | 4°C (39°F) | least pleasant |
| February | 4°C (39°F) | -1°C (30°F) | 95 mm | 60% | 4°C (39°F) | least pleasant |
| March | 7°C (44°F) | 1°C (35°F) | 113 mm | 60% | 6°C (44°F) | least pleasant |
| April | 12°C (54°F) | 6°C (43°F) | 107 mm | 61% | 10°C (49°F) | fair |
| May | 17°C (63°F) | 12°C (53°F) | 101 mm | 63% | 15°C (59°F) | best |
| June | 23°C (73°F) | 17°C (63°F) | 115 mm | 59% | 19°C (67°F) | best |
| July | 26°C (79°F) | 21°C (70°F) | 114 mm | 54% | 24°C (74°F) | best |
| August | 26°C (79°F) | 21°C (70°F) | 114 mm | 53% | 24°C (75°F) | best |
| September | 23°C (74°F) | 18°C (64°F) | 97 mm | 51% | 22°C (72°F) | best |
| October | 18°C (64°F) | 12°C (54°F) | 124 mm | 55% | 18°C (64°F) | best |
| November | 12°C (53°F) | 7°C (44°F) | 101 mm | 57% | 12°C (54°F) | fair |
| December | 7°C (44°F) | 2°C (36°F) | 133 mm | 63% | 6°C (43°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months