New York weather

Our guide to the weather in New York during September

23

Average high

5

UV Index

7mm

Month rainfall

75%

Humidity

New York is a city of extremes and the weather is no exception. We've looked at the most up-to-date weather data for New York, covering the last 12 years up to 2021, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about New York weather in September.

How warm is it in New York during September?

The temperature reaches around 23℃ during the daytime in September, falling away to 18℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in New York during September?

On average, there will be 12 rainy days during the month, amounting to 6.6mm in total. That's almost nothing at all, therefore rain isn't something we think you need to consider. You're not likely to see a thunderstorm during your trip.

Weather in New York

Our month-by-month guide to the weather and climate in New York

2.7

New York weather in

January
4.2

New York weather in

February
7.7

New York weather in

March
13.2

New York weather in

April
18.5

New York weather in

May
23.5

New York weather in

June
27.2

New York weather in

July
26.6

New York weather in

August
23.3

New York weather in

September
17.5

New York weather in

October
11.2

New York weather in

November
6.3

New York weather in

December