September weather forecast
Armonk, NY

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Armonk, New York, with an average temperature ranging between min 60.6°F (15.9°C) and max 73.9°F (23.3°C).

Temperature

The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 81.1°F (27.3°C) in August to a still moderately hot 73.9°F (23.3°C). In the month of September, an average of 60.6°F (15.9°C) marks the low-temperature in Armonk.

Humidity

The average relative humidity in September in Armonk is 74%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 2.2" (56mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September in Armonk is 12h and 28min.
On the first day of September, sunrise is at 6:22 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:37 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In Armonk, New York, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What is the average September temperature in Armonk?

In September, the average high-temperature and low-temperature in Armonk, New York, are 73.9°F (23.3°C) and 60.6°F (15.9°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, in August is appraised at 84.2°F (29°C).

What is the average humidity in September in Armonk?

In Armonk, the average relative humidity in September is 74%.

What is the driest month in Armonk?

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.2" (56mm) of precipitation.

How many days does it rain in September in Armonk?

In Armonk, New York, in September, it is raining for 12.6 days, with typically 2.2" (56mm) of accumulated precipitation.

When it does not snow in Armonk?

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

How many hours of daylight does Armonk have in September?

In September, the average day length in Armonk is 12h and 28min.

What time are sunrise and sunset in September in Armonk?

On the first day of September, sunrise is at 6:22 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:37 pm EDT.

How long on average sun shines in September in Armonk?

In Armonk, New York, the average sunshine duration in September is 8.8h.

How high is the UV index in September in Armonk?

In Armonk, New York, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from 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
Armonk, NY

Average temperature in September - Armonk, NY
  • Average high temperature in September: 73.9°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 60.6°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25°F).

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Average pressure in September
Armonk, NY

Average pressure in September - Armonk, 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).

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Average wind speed in September
Armonk, NY

Average wind speed in September - Armonk, NY
  • Average wind speed in September: 6.8mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (6mph).

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Average humidity in September
Armonk, NY

Average humidity in September - Armonk, NY
  • Average humidity in September: 74%

The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April and August (71%).

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Average rainfall in September
Armonk, NY

Average rainfall in September - Armonk, NY
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is September (2.2").

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Average rainfall days in September
Armonk, NY

Average rainfall days in September - Armonk, NY
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.1 days).

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Average snowfall in September
Armonk, NY

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

The month with the highest snowfall is March (3.78").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Armonk, NY

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

The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Armonk, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
Armonk, NY

Average sunshine days in September - Armonk, NY
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.3 days).

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Average UV index in September
Armonk, NY

Average UV index in September - Armonk, NY
  • Average UV index in September: 4

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).

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Average cloud cover in September
Armonk, NY

Average cloud cover in September - Armonk, NY
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Armonk, NY

Average visibility in September - Armonk, 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).

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Armonk, New York, USA

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