September weather forecast and climate
Cotter, AR

Weather in September

September, the first month of the autumn, in Cotter, is still a warm month, with average temperature fluctuating between 60.4°F (15.8°C) and 82.4°F (28°C).

Temperature

In Cotter, the average high-temperature marginally drops, from a tropical 89.8°F (32.1°C) in August, to a warm 82.4°F (28°C). The average low-temperature, is 60.4°F (15.8°C).

Heat index

In September, the average heat index is estimated at a tropical 88.2°F (31.2°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 74%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 2.01" (51mm) of precipitation.

Snowfall

April through October are months without snowfall in Cotter, Arkansas.

Daylight

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

Sunshine

The average sunshine in Cotter is 9.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Cotter?

The average high-temperature, in September, is 82.4°F (28°C), while the average low-temperature is 60.4°F (15.8°C). The average heat index (a.k.a. 'real feel', 'feels like'), that combines air temperature and relative humidity, in September is calculated to 88.2°F (31.2°C).

What is the average humidity in September in Cotter?

The average relative humidity in September is 74%.

How much does it rain in Cotter in September?

In Cotter, Arkansas, during September, the rain falls for 12.5 days and regularly aggregates up to 2.01" (51mm) of precipitation.

What is the driest month in Cotter?

The month with the least rainfall in Cotter, Arkansas, is September when the rain falls for 12.5 days and typically collects 2.01" (51mm) of precipitation.

When it does not snow in Cotter?

April through October are months without snowfall.

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

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

How long on average sun shines in September in Cotter?

The average sunshine in September is 9.2h.

How high is the UV index in September in Cotter?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Cotter, AR

Average temperature in September - Cotter, AR
  • Average high temperature in September: 82.4°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in September: 60.4°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

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Average pressure in September
Cotter, AR

Average pressure in September - Cotter, AR
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Cotter, AR

Average wind speed in September - Cotter, AR
  • Average wind speed in September: 4.7mph

The windiest months (with the highest average wind speed) are February, March and April (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

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Average humidity in September
Cotter, AR

Average humidity in September - Cotter, AR
  • Average humidity in September: 74%

The month with the highest relative humidity is March (79%).
Months with the lowest relative humidity are August and October (73%).

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Average rainfall in September
Cotter, AR

Average rainfall in September - Cotter, AR
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in September
Cotter, AR

Average rainfall days in September - Cotter, AR
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in September
Cotter, AR

Average snowfall in September - Cotter, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.93").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Cotter, AR

Average snowfall days in September - Cotter, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.8 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Cotter, AR

Average daylight in September / Average sunshine in September - Cotter, AR
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 9.2h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 5.1h).

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Average sunshine days in September
Cotter, AR

Average sunshine days in September - Cotter, AR
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (11.9 days).

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Average UV index in September
Cotter, AR

Average UV index in September - Cotter, AR
  • Average UV index in September: 5

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

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Average cloud cover in September
Cotter, AR

Average cloud cover in September - Cotter, AR
  • Average cloud cover in September: 32

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 28).

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Average visibility in September
Cotter, AR

Average visibility in September - Cotter, AR
  • Average visibility in September: 5mi

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

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