September weather forecast
New Rochelle, NY

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Weather in September

New Rochelle bids adieu to summer in September as it transitions into the cooler fall weather. A significant dip in temperature to 74.5°F (23.6°C) heralds the onset of the soothing fall season. The gradual shift in climate is marked by a shift in the city's colors as foliage starts to don varied hues. Shorter days and longer nights begin to prevail, setting the stage for the upcoming crisp October weather. Rainfall sees a decrease compared to the summer months, making for drier days.

Temperature

The shift from August to September coincides with a small decrease in the average high-temperature, down to a still warm 74.5°F (23.6°C) from 81.3°F (27.4°C). Throughout September, an average low-temperature of 61.7°F (16.5°C) is expected.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In September, in New Rochelle, New York, the rain falls for 12.9 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. In New Rochelle, New York, during the entire year, the rain falls for 150.3 days and collects up to 27.72" (704mm) of precipitation.

Snowfall

In New Rochelle, snow does not fall in May through October.

Daylight

In New Rochelle, New York, the average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:22 am and sunset at 7:27 pm. On the last day of September, in New Rochelle, sunrise is at 6:51 am and sunset at 6:38 pm EDT.

Sunshine

In New Rochelle, the average sunshine in September is 8.9h.

UV index

The average daily maximum UV index in September in New Rochelle is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A daily high UV index of 5 in September leads to these guidelines:
Adopt protective measures - Suggestions to resist sunburn are offered. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.

Frequently asked questions

What are the temperatures in New Rochelle in September?

The average high-temperature and low-temperature in New Rochelle, New York, during September are 74.5°F (23.6°C) and 61.7°F (16.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 86°F (30°C).

What is the average humidity in September in New Rochelle?

In New Rochelle, the average relative humidity in September is 73%.

How many days does it rain in September in New Rochelle?

In New Rochelle, in September, it is raining for 12.9 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in New Rochelle?

In New Rochelle, New York, snow does not fall in May through October.

What is the average length of the day in September in New Rochelle?

In New Rochelle, New York, the average day length in September is 12h and 27min.

When is the sunrise / sunset in September in New Rochelle?

In September, on the first day of the month, sunrise is at 6:22 am and sunset at 7:27 pm. On the last day of the month, in New Rochelle, sunrise is at 6:51 am and sunset at 6:38 pm EDT.

How many hours of sunshine does New Rochelle have in September?

The average sunshine duration in September in New Rochelle, New York, is 8.9h.

What is the UV index intensity in September in New Rochelle?

In New Rochelle, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
New Rochelle, NY

Average temperature in September - New Rochelle, NY
  • Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in September
New Rochelle, NY

Average pressure in September - New Rochelle, NY
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
New Rochelle, NY

Average wind speed in September - New Rochelle, NY
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in September
New Rochelle, NY

Average humidity in September - New Rochelle, NY
  • Average humidity in September: 73%

The months with the highest relative humidity are February and December (75%).
The month with the lowest relative humidity is August (70%).

Average rainfall in September
New Rochelle, NY

Average rainfall in September - New Rochelle, NY
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and February (1.69").

Average rainfall days in September
New Rochelle, NY

Average rainfall days in September - New Rochelle, NY
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September
New Rochelle, NY

Average snowfall in September - New Rochelle, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
New Rochelle, NY

Average snowfall days in September - New Rochelle, NY
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
New Rochelle, NY

Average daylight in September / Average sunshine in September - New Rochelle, NY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
New Rochelle, NY

Average sunshine days in September - New Rochelle, NY
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (12 days).

Average UV index in September
New Rochelle, NY

Average UV index in September - New Rochelle, NY
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September
New Rochelle, NY

Average cloud cover in September - New Rochelle, NY
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
New Rochelle, NY

Average visibility in September - New Rochelle, NY
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

New Rochelle, New York, USA

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