September weather forecast and climate
Grayson, AL

Weather in September

The first month of the autumn, September, is also a moderately hot month in Grayson, Alabama, with average temperature varying between 82.6°F (28.1°C) and 63.7°F (17.6°C).

Temperature

In Grayson, Alabama, the average high-temperature marginally drops, from a tropical 88°F (31.1°C) in August, to a warm 82.6°F (28.1°C). In September, the average low-temperature is 63.7°F (17.6°C).

Heat index

The average heat index in September is estimated at a hot 88.9°F (31.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'feels like', 'apparent temperature', 'real feel', 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 (metabolic differences, clothing, differences in body mass, height, and shape), 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. 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

The average relative humidity in September is 75%.

Rainfall

In September, in Grayson, Alabama, the rain falls for 14.7 days. Throughout September, 3.03" (77mm) of precipitation is accumulated. In Grayson, during the entire year, the rain falls for 176.4 days and collects up to 43.19" (1097mm) of precipitation.

Snowfall

In Grayson, Alabama, snow does not fall in April through October.

Daylight

In Grayson, Alabama, the average length of the day is 12.4h.

Sunshine

The average sunshine in Grayson is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Grayson?

In September, in Grayson, Alabama, the average high-temperature is 82.6°F (28.1°C), and the average low-temperature is 63.7°F (17.6°C). The average heat index (a.k.a. 'real feel', 'feels like'), that combines air temperature and relative humidity, in September is calculated to 88.9°F (31.6°C).

What is the average humidity in September in Grayson?

In Grayson, the average relative humidity in September is 75%.

How many days does it rain in September in Grayson?

In Grayson, in September, it is raining for 14.7 days, with typically 3.03" (77mm) of accumulated precipitation.

When it does not snow in Grayson?

April through October are months without snowfall in Grayson.

How many hours of daylight does Grayson have in September?

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

How many hours of sunshine does Grayson have in September?

The average sunshine in September in Grayson, Alabama, is 8.6h.

What is the UV index reading in September in Grayson?

The average daily maximum UV index in September in Grayson is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Grayson, AL

Average temperature in September - Grayson, AL
  • Average high temperature in September: 82.6°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (48.2°F).

  • Average low temperature in September: 63.7°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

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Average pressure in September
Grayson, AL

Average pressure in September - Grayson, AL
  • 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 (29.97").

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Average wind speed in September
Grayson, AL

Average wind speed in September - Grayson, AL
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).

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Average humidity in September
Grayson, AL

Average humidity in September - Grayson, AL
  • Average humidity in September: 75%

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

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Average rainfall in September
Grayson, AL

Average rainfall in September - Grayson, AL
  • Average rainfall in September: 3.03"

The wettest month (with the highest rainfall) is December (4.49").
The driest month (with the least rainfall) is November (2.36").

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Average rainfall days in September
Grayson, AL

Average rainfall days in September - Grayson, AL
  • Average rainfall days in September: 14.7 days

The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (10.6 days).

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Average snowfall in September
Grayson, AL

Average snowfall in September - Grayson, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.63").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Grayson, AL

Average snowfall days in September - Grayson, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.1 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
Grayson, AL

Average daylight in September / Average sunshine in September - Grayson, AL
  • 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: 8.6h

Months with the most sunshine are June and July (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in September
Grayson, AL

Average sunshine days in September - Grayson, AL
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in September
Grayson, AL

Average UV index in September - Grayson, AL
  • Average UV index in September: 5

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

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Average cloud cover in September
Grayson, AL

Average cloud cover in September - Grayson, AL
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).

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Average visibility in September
Grayson, AL

Average visibility in September - Grayson, AL
  • Average visibility in September: 6mi

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

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