New York weather

Our guide to the weather in New York destination during September

25

Average high

4

UV Index

131mm

Monthly rainfall

70%

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 2022, 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 25℃ during the daytime in September, falling away to 17℃ 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 6 rainy days during the month, amounting to 130.5mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.

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Weather in New York

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

2.4

New York weather in

January
3.9

New York weather in

February
8.4

New York weather in

March
14.4

New York weather in

April
20.4

New York weather in

May
25.4

New York weather in

June
29.2

New York weather in

July
28.6

New York weather in

August
24.9

New York weather in

September
18.2

New York weather in

October
11.3

New York weather in

November
6.0

New York weather in

December