September weather forecast
Greenbrier, AR

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Weather in September

September, the first month of the autumn in Greenbrier, is also a moderately hot month, with an average temperature ranging between max 83.5°F (28.6°C) and min 63.1°F (17.3°C).

Temperature

As September commences, the average high-temperature subtly reduces, transitioning from a hot 90.1°F (32.3°C) in August to a moderately hot 83.5°F (28.6°C). Throughout September, Greenbrier witnesses a consistent average low-temperature of 63.1°F (17.3°C).

Heat index

In September, the heat index is appraised at a hot 89.6°F (32°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. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.

Humidity

In September, the average relative humidity is 73%.

Rainfall

September is the month with the least rainfall in Greenbrier. Rain falls for 9.7 days and accumulates 0.94" (24mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:42 am and sunset at 7:36 pm. On the last day of September, in Greenbrier, Arkansas, sunrise is at 7:04 am and sunset at 6:54 pm CDT.

Sunshine

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

UV index

In Greenbrier, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

How hot is it in Greenbrier in September?

The high-temperature, in September, in Greenbrier, is 83.5°F (28.6°C), while the low-temperature averages to 63.1°F (17.3°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in September in Greenbrier?

In Greenbrier, the average relative humidity in September is 73%.

What is the driest month in Greenbrier?

The month with the least rainfall in Greenbrier, Arkansas, is September, when the rain falls for 9.7 days and typically collects 0.94" (24mm) of precipitation.

How much does it rain in Greenbrier in September?

In Greenbrier, Arkansas, in September, it is raining for 9.7 days, with typically 0.94" (24mm) of accumulated precipitation.

When it does not snow in Greenbrier?

April through October are months without snowfall in Greenbrier.

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

In Greenbrier, Arkansas, the average day length in September is 12h and 23min.

When are sunrise and sunset in September in Greenbrier?

In September, on the first day of the month, sunrise is at 6:42 am and sunset at 7:36 pm. On the last day of the month, in Greenbrier, sunrise is at 7:04 am and sunset at 6:54 pm CDT.

How long on average sun shines in September in Greenbrier?

In September, the average sunshine duration in Greenbrier is 9.5h.

What is the UV index reading in September in Greenbrier?

In Greenbrier, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from 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
Greenbrier, AR

Average temperature in September - Greenbrier, AR
  • Average high temperature in September: 83.5°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (46.9°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).

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Average pressure in September
Greenbrier, AR

Average pressure in September - Greenbrier, AR
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Greenbrier, AR

Average wind speed in September - Greenbrier, AR
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are March and April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in September
Greenbrier, AR

Average humidity in September - Greenbrier, AR
  • Average humidity in September: 73%

The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Greenbrier, AR

Average rainfall in September - Greenbrier, AR
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is September (0.94").

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Average rainfall days in September
Greenbrier, AR

Average rainfall days in September - Greenbrier, AR
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is October (7.2 days).

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Average snowfall in September
Greenbrier, AR

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

The month with the highest snowfall is March (0.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Greenbrier, AR

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

The month with the highest number of snowfall days is January (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Greenbrier, AR
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 9h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

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Average sunshine days in September
Greenbrier, AR

Average sunshine days in September - Greenbrier, AR
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is October (21.6 days).
The month with the least sunshine days is July (14 days).

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Average UV index in September
Greenbrier, AR

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

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

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Average cloud cover in September
Greenbrier, AR

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

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 26).

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Average visibility in September
Greenbrier, AR

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

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

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Greenbrier, Arkansas, USA

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