September weather forecast and climate
Manhasset, NY

Weather in September

September, the first month of the autumn, in Manhasset, is also a moderately hot month, with average temperature varying between 73.4°F (23°C) and 63.5°F (17.5°C).

Temperature

In Manhasset, the average high-temperature marginally drops, from a warm 80.4°F (26.9°C) in August, to a still moderately hot 73.4°F (23°C). In Manhasset, in September, the average low-temperature is 63.5°F (17.5°C).

Humidity

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

Rainfall

The month with the least rainfall is September when the rain falls for 12.9 days and typically collects 2.4" (61mm) of precipitation.

Snowfall

May through October are months without snowfall in Manhasset.

Daylight

In Manhasset, the average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine is 9h.

UV index

In Manhasset, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Manhasset?

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

What is the driest month in Manhasset?

September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 2.4" (61mm) of precipitation.

How many days does it rain in September in Manhasset?

In Manhasset, in September, it is raining for 12.9 days, with typically 2.4" (61mm) of accumulated precipitation.

When it does not snow in Manhasset?

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

What is the average length of the day in September in Manhasset?

The average length of the day in September is 12.4h.

How many hours of sunshine does Manhasset have in September?

In September, the average sunshine is 9h.

What is the UV index reading in September in Manhasset?

In September, the average daily maximum UV index in Manhasset is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Manhasset, NY

Average temperature in September - Manhasset, NY
  • Average high temperature in September: 73.4°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in September: 63.5°F

Months with the highest average low temperature are July and August (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

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Average pressure in September
Manhasset, NY

Average pressure in September - Manhasset, NY
  • Average pressure in September: 30.05"

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

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Average wind speed in September
Manhasset, NY

Average wind speed in September - Manhasset, NY
  • Average wind speed in September: 8.3mph

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).

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Average humidity in September
Manhasset, NY

Average humidity in September - Manhasset, NY
  • Average humidity in September: 73%

Months with the highest relative humidity are February, May and December (75%).
Months with the lowest relative humidity are August and November (71%).

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Average rainfall in September
Manhasset, NY

Average rainfall in September - Manhasset, NY
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.4").

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Average rainfall days in September
Manhasset, NY

Average rainfall days in September - Manhasset, NY
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in September
Manhasset, NY

Average snowfall in September - Manhasset, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.01").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Manhasset, NY

Average snowfall days in September - Manhasset, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Manhasset, NY

Average daylight in September / Average sunshine in September - Manhasset, NY
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in September
Manhasset, NY

Average sunshine days in September - Manhasset, NY
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.6 days).

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Average UV index in September
Manhasset, NY

Average UV index in September - Manhasset, NY
  • Average UV index in September: 5

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

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Average cloud cover in September
Manhasset, NY

Average cloud cover in September - Manhasset, NY
  • Average cloud cover in September: 33

Months with the most cloud cover are February and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 29).

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Average visibility in September
Manhasset, NY

Average visibility in September - Manhasset, NY
  • Average visibility in September: 6mi

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

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