September weather forecast
Clarksville, NY

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Weather in September

The first month of the autumn, September, is also an agreeable month in Clarksville, New York, with an average temperature fluctuating between 51.3°F (10.7°C) and 71.4°F (21.9°C).

Temperature

With the commencement of September, Clarksville records a moderate temperature decline, with the average high easing from August's moderately hot 79.2°F (26.2°C) to a pleasant 71.4°F (21.9°C). The average low-temperature during September nights is a fresh 51.3°F (10.7°C).

Humidity

In Clarksville, New York, the average relative humidity in September is 78%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.4 days and typically collects 2.05" (52mm) of precipitation.

Snowfall

In Clarksville, New York, snow does not fall in June through September.

Daylight

The average length of the day in September in Clarksville is 12h and 29min.
On the first day of September, sunrise is at 6:21 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:38 pm EDT.

Sunshine

In Clarksville, New York, the average sunshine in September is 9h.

UV index

In Clarksville, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 3 during September translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What are September temperatures in Clarksville?

During September, Clarksville experiences an average high-temperature of 71.4°F (21.9°C) and a low-temperature of 51.3°F (10.7°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 86°F (30°C).

What is the average humidity in September in Clarksville?

In Clarksville, New York, the average relative humidity in September is 78%.

What is the driest month in Clarksville?

The month with the least rainfall is September, when the rain falls for 11.4 days and typically collects 2.05" (52mm) of precipitation.

How many days does it rain in September in Clarksville?

In September, in Clarksville, New York, the rain falls for 11.4 days. Throughout September, 2.05" (52mm) of precipitation is accumulated.

When it does not snow in Clarksville?

In Clarksville, New York, snow does not fall in June through September.

Does it snow in Clarksville in September?

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

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

In Clarksville, the average day length in September is 12h and 29min.

When is the sunrise / sunset in September in Clarksville?

On the first day of September, sunrise is at 6:21 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:38 pm EDT.

How many hours of sunshine does Clarksville have in September?

In Clarksville, New York, the average sunshine duration in September is 9h.

What is the UV index intensity in September in Clarksville?

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe 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
Clarksville, NY

Average temperature in September - Clarksville, NY
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

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Average pressure in September
Clarksville, NY

Average pressure in September - Clarksville, NY
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Clarksville, NY

Average wind speed in September - Clarksville, NY
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are January and February (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Clarksville, NY

Average humidity in September - Clarksville, NY
  • Average humidity in September: 78%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in September
Clarksville, NY

Average rainfall in September - Clarksville, NY
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in September
Clarksville, NY

Average rainfall days in September - Clarksville, NY
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in September
Clarksville, NY

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

The month with the highest snowfall is January (8.15").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Clarksville, NY

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

The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Clarksville, NY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in September
Clarksville, NY

Average sunshine days in September - Clarksville, NY
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is September (16.7 days).
The months with the least sunshine days are February and April (11.3 days).

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Average UV index in September
Clarksville, NY

Average UV index in September - Clarksville, NY
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Clarksville, NY

Average cloud cover in September - Clarksville, NY
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in September
Clarksville, NY

Average visibility in September - Clarksville, NY
  • Average visibility in September: 5mi

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

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Clarksville, New York, USA

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