September weather forecast and climate
Graysonia, AR

Weather in September

September, the first month of the autumn, in Graysonia, is also a hot month, with average temperature ranging between min 64.9°F (18.3°C) and max 86.4°F (30.2°C).

Temperature

In Graysonia, the average high-temperature in September marginally drops, from a tropical 92.5°F (33.6°C) in August, to a still hot 86.4°F (30.2°C). The average low-temperature, in Graysonia, Arkansas, is 64.9°F (18.3°C).

Heat index

In September, the average heat index is evaluated at a sweltering 96.4°F (35.8°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', 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 (pregnancy, differences in body mass, height, and shape, wind), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Graysonia, Arkansas, the average relative humidity in September is 71%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 1.61" (41mm) of precipitation.

Snowfall

In Graysonia snow does not fall in April through November.

Daylight

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

Sunshine

The average sunshine in September is 9.5h.

UV index

In September, the average daily maximum UV index in Graysonia is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Graysonia?

In September, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 64.9°F (18.3°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), that factores the actual air temperature with the relative humidity, is appraised at 96.4°F (35.8°C).

What is the average humidity in September in Graysonia?

In Graysonia, the average relative humidity in September is 71%.

How much does it rain in Graysonia in September?

In Graysonia, in September, it is raining for 11.4 days, with typically 1.61" (41mm) of accumulated precipitation.

What is the driest month in Graysonia?

The month with the least rainfall in Graysonia is September when the rain falls for 11.4 days and typically collects 1.61" (41mm) of precipitation.

When it does not snow in Graysonia?

In Graysonia snow does not fall in April through November.

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

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

How long on average sun shines in September in Graysonia?

The average sunshine in September in Graysonia, Arkansas, is 9.5h.

What is the UV index reading in September in Graysonia?

In Graysonia, Arkansas, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in September
Graysonia, AR

Average temperature in September - Graysonia, AR
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 64.9°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

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Average pressure in September
Graysonia, AR

Average pressure in September - Graysonia, AR
  • Average pressure in September: 30"

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

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Average wind speed in September
Graysonia, AR

Average wind speed in September - Graysonia, AR
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Graysonia, AR

Average humidity in September - Graysonia, AR
  • Average humidity in September: 71%

Months with the highest relative humidity are February and March (80%).
The month with the lowest relative humidity is August (70%).

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Average rainfall in September
Graysonia, AR

Average rainfall in September - Graysonia, AR
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days in September
Graysonia, AR

Average rainfall days in September - Graysonia, AR
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is November (9.5 days).

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Average snowfall in September
Graysonia, AR

Average snowfall in September - Graysonia, 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 and November (0").

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Average snowfall days in September
Graysonia, AR

Average snowfall days in September - Graysonia, AR
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (1.3 days).
Months with the least snowfall days are April, May, June, July, August and October (0 days).

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

Average daylight in September / Average sunshine in September - Graysonia, 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: 9.5h

The month with the most sunshine is August (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 5.1).

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Average sunshine days in September
Graysonia, AR

Average sunshine days in September - Graysonia, AR
  • Average sunshine days in September: 17.1 days

The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is February (13.9 days).

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Average UV index in September
Graysonia, AR

Average UV index in September - Graysonia, AR
  • Average UV index in September: 6

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

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Average cloud cover in September
Graysonia, AR

Average cloud cover in September - Graysonia, AR
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
Graysonia, AR

Average visibility in September - Graysonia, AR
  • Average visibility in September: 6mi

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

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