Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signifies a gentle decline in Mamaroneck's average high-temperature, easing from 81.3°F (27.4°C) in August to a still moderately hot 74.5°F (23.6°C). An average low-temperature of 61.7°F (16.5°C) is recorded in the month of September in Mamaroneck.Humidity
In September, the average relative humidity in Mamaroneck is 73%.Rainfall
In Mamaroneck, in September, during 12.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 150.3 rainfall days, and 27.72" (704mm) of precipitation is accumulated.Snowfall
In Mamaroneck, snow does not fall in May through October.Ocean temperature
In Mamaroneck, the average seawater temperature in September is 70.2°F (21.2°C).Note: For the majority, swimming in water with a temperature of 70.2°F (21.2°C) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in September in Mamaroneck is 12h and 28min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:38 pm EDT.
Sunshine
The average sunshine in September in Mamaroneck is 8.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mamaroneck in September?
What is the average humidity in September in Mamaroneck?
How many days does it rain in September in Mamaroneck?
When it does not snow in Mamaroneck?
How cold is the water in September in Mamaroneck?
What is the average length of the day in September in Mamaroneck?
When is the sunrise / sunset in September in Mamaroneck?
How many hours of sunshine does Mamaroneck have in September?
What is the UV index intensity in September in Mamaroneck?
Average temperature in September
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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 sea temperature in September
Mamaroneck, NY
- Average sea temperature in September: 70.1°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).
Average daylight in September /
Average sunshine in September
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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
Mamaroneck, 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).
Mamaroneck, New York, USA
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