United States New York Weather in September — Climate Guide
September in New York is Excellent
September is Excellent for New York.
September is genuinely the best month to visit NYC. Weather is ideal: 22-25°C / 72-77°F daytime, 15-17°C / 59-63°F evenings, lower humidity than summer. Crisp light is photographically perfect — September is often considered NYC's most photogenic month.
US Open tennis Grand Slam (late August through early September) is the biggest sporting event of the NYC year. Main draw tickets sell out months ahead but qualifying-week and outer-court tickets ($30-100) are more accessible.
Travel score
New York September Weather Stats
Avg High
25°C
Avg Low
16°C
Rainy Days
9
100mm total
Sunshine
8.5h
Daily avg
Humidity
68%
Comfortable
UV Index
7
High
Wind
13 km/h
Gusts 25
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
21 μg/m³
PM10
30 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
25°C
Nighttime
16°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 25 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Best weather of the year (22-25°C, low humidity)
- Fashion Week celebrity energy
- Photographically perfect light
Cons
- Hotel prices remain at peak
- Fashion Week fills central hotels
- 9/11 Memorial Day brings somber atmosphere downtown
September Events & Festivals
- US Open tennis main draw (late August through early September)
- Fashion Week (early September) — biggest fashion event of the year
- 9/11 Memorial Day (September 11)
- Feast of San Gennaro in Little Italy (mid-September, 11 days)
New York in September — Full Picture
September is genuinely the best month to visit NYC. Weather is ideal: 22-25°C / 72-77°F daytime, 15-17°C / 59-63°F evenings, lower humidity than summer. Crisp light is photographically perfect — September is often considered NYC's most photogenic month.
US Open tennis Grand Slam (late August through early September) is the biggest sporting event of the NYC year. Main draw tickets sell out months ahead but qualifying-week and outer-court tickets ($30-100) are more accessible.
NYC Fashion Week (early September) brings runway shows, designer parties, and street-style energy. While main shows are industry-only, Spring Studios, Park Avenue Armory, and major hotel venues see celebrity arrivals from 4 PM onwards. Hotels around the Lincoln Center area get fashion-week premium pricing.
9/11 Memorial Day (September 11) is the somber annual commemoration. The reflecting pools and museum at Ground Zero become quiet, contemplative places. Annual Tribute in Light beams from Lower Manhattan (visible 60+ miles).
Feast of San Gennaro in Little Italy (mid-September, 11 days) is one of NYC's most colorful free street festivals — Italian food, music, religious processions on Mulberry Street.
Hotel prices remain in spring peak range but with one advantage: NYC is at its most enjoyable.
What to Wear & What to Pack
Sweater + light jacket. Daytime mild (22-25°C), evenings cooler (15-17°C). Crisp NYC autumn light is photographically perfect.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
16.7°C
7°C
12/mo
Summer (Jun·Jul·Aug)
28.7°C
19°C
10.3/mo
Autumn (Sep·Oct·Nov)
Current18.7°C
10.3°C
9.3/mo
Winter (Dec·Jan·Feb)
5.3°C
-1.7°C
10.3/mo
New York Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 4° | -3° | 11d·84mm | 5h | 64% | 1 | Moderate | Low season | |
| 6° | -2° | 10d·78mm | 6h | 64% | 2 | Moderate | Low season | |
| 11° | 2° | 12d·95mm | 7h | 62% | 4 | Moderate | Shoulder | |
| April (Best) | 17° | 7° | 12d·110mm | 8h | 60% | 6 | Busy | Peak |
| May (Best) | 22° | 12° | 12d·115mm | 9h | 64% | 8 | Busy | Peak |
| June (Best) | 27° | 17° | 11d·105mm | 10h | 65% | 9 | Very busy | Peak |
| 30° | 20° | 10d·105mm | 10h | 64% | 9 | Very busy | Peak | |
| 29° | 20° | 10d·105mm | 9h | 67% | 8 | Busy | Shoulder | |
| September (Best) | 25° | 16° | 9d·100mm | 8.5h | 68% | 7 | Busy | Peak |
| October (Best) | 19° | 10° | 9d·95mm | 8h | 65% | 5 | Busy | Shoulder |
| 12° | 5° | 10d·95mm | 6h | 65% | 3 | Busy | Peak | |
| 6° | 0° | 10d·90mm | 5h | 64% | 1 | Very busy | Peak |
View Other Months
New York September Hotel Picks
Frequently Asked Questions
Is September a good time to visit New York?
New York in September is Excellent. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in New York in September?
New York September averages a high of 25°C and a low of 16°C.
Does it rain much in New York in September?
New York September averages 100mm of rainfall over about 9 rainy days.
What should I wear in New York in September?
Sweater + light jacket. Daytime mild (22-25°C), evenings cooler (15-17°C). Crisp NYC autumn light is photographically perfect.
What time are sunrise and sunset in New York in September?
New York September sunrise is 06:30 and sunset is 19:00, with 12h 30m of daylight.
What's the air quality like in New York in September?
New York September air quality (AQI) averages 50, rated Good. PM2.5 averages 21μg/m³.
What activities are recommended in New York in September?
In September, New York is great for US Open tennis, Fashion Week street-style watching, Feast of San Gennaro.
Is September peak season in New York?
New York September crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit New York
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.