September weather forecast
Highland Mills, NY

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Weather in September

September, the first month of the autumn in Highland Mills, is still a warm month, with an average temperature varying between 74.1°F (23.4°C) and 54.9°F (12.7°C).

Temperature

The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 81.5°F (27.5°C) in August to a still warm 74.1°F (23.4°C). September brings with it a nighttime average temperature of 54.9°F (12.7°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

In Highland Mills, during September, the rain falls for 12.1 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, there are 141.2 rainfall days, and 25" (635mm) of precipitation is accumulated.

Snowfall

In Highland Mills, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:23 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 4 in September translates into these instructions:
Exercise prevention - Warding off sunburn is urged. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

An average high-temperature, in September, in Highland Mills, is 74.1°F (23.4°C) and the average low-temperature is 54.9°F (12.7°C). 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 appraised at 86°F (30°C).

What is the average humidity in September?

In Highland Mills, the average relative humidity in September is 78%.

How many days does it rain in September?

In September, the rain falls for 12.1 days. Throughout September, 1.54" (39mm) of precipitation is accumulated.

When it does not snow?

In Highland Mills, snow does not fall in June through September.

Does it snow in September?

In Highland Mills, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In Highland Mills, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
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
Highland Mills, NY

Average temperature in September - Highland Mills, NY
  • Average high temperature in September: 74.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in September: 54.9°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in September
Highland Mills, NY

Average pressure in September - Highland Mills, NY
  • Average pressure in September: 30.06"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
Highland Mills, NY

Average wind speed in September - Highland Mills, NY
  • Average wind speed in September: 5mph

The windiest months (with the highest average wind speed) are January, February and March (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in September
Highland Mills, NY

Average humidity in September - Highland Mills, NY
  • Average humidity in September: 78%

The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is April (74%).

Average rainfall in September
Highland Mills, NY

Average rainfall in September - Highland Mills, NY
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in September
Highland Mills, NY

Average rainfall days in September - Highland Mills, NY
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (5.5 days).

Average snowfall in September
Highland Mills, NY

Average snowfall in September - Highland Mills, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Highland Mills, NY

Average snowfall days in September - Highland Mills, NY
  • Average snowfall days in September: 0 days

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

Average daylight in September /
Average sunshine in September
Highland Mills, NY

Average daylight in September / Average sunshine in September - Highland Mills, 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 12min).

  • 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 30min).

Average sunshine days in September
Highland Mills, NY

Average sunshine days in September - Highland Mills, NY
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in September
Highland Mills, NY

Average UV index in September - Highland Mills, 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
Highland Mills, NY

Average cloud cover in September - Highland Mills, NY
  • Average cloud cover in September: 38

The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in September
Highland Mills, NY

Average visibility in September - Highland Mills, NY
  • Average visibility in September: 5mi

The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).

Highland Mills, New York, USA

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