From Heather Cross,
Your Guide to New York City Travel.
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August in NYC | New York City Calendar | October in NYC

September Weather:

• Average High: 76°F (24°C)
• Average Low: 61°F (16°C)
• September continues to be a warm month in New York City, but many of the summer crowds have left and evenings can be a bit cooler as the month wears on.

What to Wear:

• pack an umbrella
• a sweater or waterproof jacket (for keeping warm in the evenings)
• closed toe shoes, comfortable for walking and water-resistant, if possible

September Perks:

• most days it's cool enough to enjoy a walking tour
• summer crowds decrease, particularly families, as children return to school
• September is still warm enough and early enough in the fall to avoid the price hikes for peak travel

September Cons:

• subways and streets can be uncomfortable in the heat
• most summer activities have ended

Good to Know:

• September can still be quite warm in New York -- pack accordingly.

September Highlights/Events:

• Labor Day
• Shakespeare in the Park
• San Gennaro Festival
• Baseball Season: Yankee Stadium Visitors Guide | Shea Stadium Visitors Guide
• U.S. Open

August in NYC | New York City Calendar | October in NYC