September weather forecast and climate
De Ann, AR

Weather in September

September, the first month of the autumn, in De Ann, is also a hot month, with average temperature ranging between min 65.7°F (18.7°C) and max 86.9°F (30.5°C).

Temperature

In De Ann, the average high-temperature slightly decreases, from 93°F (33.9°C) in August, to a still tropical 86.9°F (30.5°C). In De Ann, the average low-temperature is 65.7°F (18.7°C).

Heat index

The average heat index in September is evaluated at a sweltering 97.3°F (36.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, wind), 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

Months with the lowest humidity are August and September, with an average relative humidity of 70%.

Rainfall

In De Ann, during September, the rain falls for 11.3 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in De Ann, there are 142 rainfall days, and 27.17" (690mm) of precipitation is accumulated.

Snowfall

In De Ann snow does not fall in April through December.

Daylight

The average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 9.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the temperature in September in De Ann?

In De Ann, Arkansas, in September, the average high-temperature is 86.9°F (30.5°C), and the average low-temperature is 65.7°F (18.7°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 97.3°F (36.3°C).

What is the least humid month in De Ann?

August and September, with an average relative humidity of 70%, are the least humid months in De Ann, Arkansas.

What is the average humidity in September in De Ann?

The average relative humidity in September in De Ann, Arkansas, is 70%.

How many days does it rain in September in De Ann?

In De Ann, Arkansas, in September, during 11.3 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in De Ann?

April through December are months without snowfall in De Ann.

How many hours of daylight does De Ann have in September?

In September, the average length of the day in De Ann, Arkansas, is 12.4h.

How long on average sun shines in September in De Ann?

In De Ann, the average sunshine in September is 9.6h.

What is the UV index reading in September in De Ann?

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

Average temperature in September
De Ann, AR

Average temperature in September - De Ann, AR
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).

[Resources]

Average pressure in September
De Ann, AR

Average pressure in September - De Ann, AR
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.93").

[Resources]

Average wind speed in September
De Ann, AR

Average wind speed in September - De Ann, AR
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

[Resources]

Average humidity in September
De Ann, AR

Average humidity in September - De Ann, AR
  • Average humidity in September: 70%

Months with the highest relative humidity are February, March and December (80%).
Months with the lowest relative humidity are August and September (70%).

[Resources]

Average rainfall in September
De Ann, AR

Average rainfall in September - De Ann, AR
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is April (3.07").
The driest month (with the least rainfall) is November (1.5").

[Resources]

Average rainfall days in September
De Ann, AR

Average rainfall days in September - De Ann, AR
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (8.8 days).

[Resources]

Average snowfall in September
De Ann, AR

Average snowfall in September - De Ann, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.55").
Months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in September
De Ann, AR

Average snowfall days in September - De Ann, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.7 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
De Ann, AR

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.6h

Months with the most sunshine are July and August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 5h).

[Resources]

Average sunshine days in September
De Ann, AR

Average sunshine days in September - De Ann, AR
  • Average sunshine days in September: 16.7 days

Months with the most sunshine days are January and October (20 days).
The month with the least sunshine days is July (13.6 days).

[Resources]

Average UV index in September
De Ann, AR

Average UV index in September - De Ann, AR
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).

[Resources]

Average cloud cover in September
De Ann, AR

Average cloud cover in September - De Ann, AR
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

[Resources]

Average visibility in September
De Ann, AR

Average visibility in September - De Ann, AR
  • Average visibility in September: 6mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location