September weather forecast
Clay, AL

Weather in September

September, the first month of the autumn, in Clay, is also a moderately hot month, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 84.7°F (29.3°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a warm 84.7°F (29.3°C). The average low-temperature, in Clay, is 64.6°F (18.1°C).

Heat index

In September, the average heat index is evaluated at a tropical 93.6°F (34.2°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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, pregnancy, differences in body mass, height, and shape, and wind affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.

Humidity

The average relative humidity in Clay is 74%.

Rainfall

In Clay, in September, during 12.1 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Clay, during the entire year, the rain falls for 149 days and collects up to 19.88" (505mm) of precipitation.

Snowfall

April through October are months without snowfall in Clay.

Daylight

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

Sunshine

The average sunshine in Clay, Alabama, is 8.8h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Clay?

In September, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 64.6°F (18.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in September is evaluated at 93.6°F (34.2°C).

What is the average humidity in September in Clay?

The average relative humidity in September is 74%.

How many days does it rain in September in Clay?

In Clay, Alabama, in September, it is raining for 12.1 days, with typically 1.14" (29mm) of accumulated precipitation.

When it does not snow in Clay?

In Clay snow does not fall in April through October.

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

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

How many hours of sunshine does Clay have in September?

In Clay, Alabama, the average sunshine in September is 8.8h.

What is the UV index reading in September in Clay?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
Clay, AL

Average temperature in September - Clay, AL
  • Average high temperature in September: 84.7°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (50.7°F).

  • Average low temperature in September: 64.6°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 (34.9°F).

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Average pressure in September
Clay, AL

Average pressure in September - Clay, AL
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.98").

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Average wind speed in September
Clay, AL

Average wind speed in September - Clay, AL
  • Average wind speed in September: 4.8mph

The windiest months (with the highest average wind speed) are January and February (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

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Average humidity in September
Clay, AL

Average humidity in September - Clay, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Clay, AL

Average rainfall in September - Clay, AL
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is October (1.06").

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Average rainfall days in September
Clay, AL

Average rainfall days in September - Clay, AL
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is November (7.9 days).

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Average snowfall in September
Clay, AL

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

The month with the highest snowfall is January (0.2").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Clay, AL

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

The month with the highest number of snowfall days is February (1 days).
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
Clay, AL

Average daylight in September / Average sunshine in September - Clay, 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: 8.8h

Months with the most sunshine are June and July (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

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Average sunshine days in September
Clay, AL

Average sunshine days in September - Clay, AL
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.6 days).

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Average UV index in September
Clay, AL

Average UV index in September - Clay, 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
Clay, AL

Average cloud cover in September - Clay, AL
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 48).
Months with the least cloud cover are June and September (Cloud cover 30).

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Average visibility in September
Clay, AL

Average visibility in September - Clay, 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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