New York in September
In September, New York averages 25°C (77°F) during the day and 17°C (63°F) at night, with around 9 days of rain (99 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
It's peak hurricane season in New York during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How September compares to the rest of the year in New York
September is in the middle of the year for warmth in New York (4th of 12) and one of the driest months (11th of 12). Daytime temperature runs 8°C above the annual average (17°C). September runs 4°C cooler than August (29°C) and cools 7°C in October (18°C).
September sunrise & sunset in New York
Times shown for New York local time (America/New_York), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in New York — September
Golden-hour and blue-hour windows for the 15th of September, in New York's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — New York in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and New York's popularity.
Crowds & pricing — September in New York
New York is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: excellent tourism weather peak hazard season (1 active)
Sun & mosquito risk — September in New York
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in New York — September
Across the year New York's sea swings from 4.9°C (February) to 23.5°C (July) — September sits at 22.3°C.
New York in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 4°C / 39°F | -3°C / 27°F | 84 mm | 11 | 4 |
| February | 6°C / 43°F | -2°C / 28°F | 78 mm | 10 | 3 |
| March | 11°C / 52°F | 2°C / 36°F | 109 mm | 11 | 2 |
| April | 17°C / 63°F | 7°C / 45°F | 105 mm | 11 | 0 |
| May | 22°C / 72°F | 13°C / 55°F | 102 mm | 11 | 0 |
| June | 27°C / 81°F | 18°C / 64°F | 99 mm | 10 | 0 |
| July | 30°C / 86°F | 21°C / 70°F | 117 mm | 11 | 0 |
| August | 29°C / 84°F | 21°C / 70°F | 113 mm | 10 | 0 |
| September | 25°C / 77°F | 17°C / 63°F | 99 mm | 9 | 0 |
| October | 18°C / 64°F | 11°C / 52°F | 102 mm | 9 | 0 |
| November | 13°C / 55°F | 6°C / 43°F | 96 mm | 10 | 1 |
| December | 7°C / 45°F | 0°C / 32°F | 102 mm | 11 | 3 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for New York in September →
Frequently asked questions
How hot is New York in September?
In September, New York averages a high of 25°C (77°F) and a low of 17°C (63°F) — generally warm.
Does it rain a lot in New York in September?
September sees occasional rain in New York, with about 9 rainy days on average.
Is September a good time to visit New York?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for New York in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for New York for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.