September weather forecastArmonk, NY
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in September /
Average sunshine in September
Armonk, NY
- Average daylight in September: 12h and 30min
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 48min
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).
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).
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).
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).
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).
