September weather forecast and climate
Clayhill, AL

September, the first month of the autumn, in Clayhill, is also a hot month, with average temperature ranging between max 88.7°F (31.5°C) and min 67.3°F (19.6°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 88.7°F (31.5°C). In Clayhill, Alabama, the average low-temperature is 67.3°F (19.6°C).

Heat index

In September, the average heat index is evaluated at a torrid 104°F (40°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like metabolic differences, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. 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 particularly important for children. 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.
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 exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

In Clayhill, Alabama, during September, the rain falls for 12.3 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, in Clayhill, Alabama, there are 158.7 rainfall days, and 33.23" (844mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Clayhill, the average length of the day is 12.3h.

Sunshine

In Clayhill, the average sunshine is 8.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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.

What is the temperature in September in Clayhill?

The average high-temperature, in September, in Clayhill, Alabama, is 88.7°F (31.5°C), while the average low-temperature is 67.3°F (19.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in September is evaluated at 104°F (40°C).

What is the average humidity in September in Clayhill?

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

How many days does it rain in September in Clayhill?

In Clayhill, Alabama, during September, the rain falls for 12.3 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow in Clayhill?

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

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

In September, the average length of the day in Clayhill, Alabama, is 12.3h.

How many hours of sunshine does Clayhill have in September?

The average sunshine in September is 8.7h.

How high is the UV index in September in Clayhill?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Clayhill, AL
  • Average high temperature in September: 88.7°F

The warmest months (with the highest average high temperature) are July and August (92.8°F).
The month with the lowest average high temperature is January (55.9°F).

  • Average low temperature in September: 67.3°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).

Average pressure in September - Clayhill, AL
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.96").

Average wind speed in September - Clayhill, AL
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Clayhill, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Clayhill, AL
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (1.85").

Average rainfall days in September - Clayhill, AL
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (7.5 days).

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

Months with the highest snowfall are January and December (0.35").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Clayhill, AL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is June (Average sunshine: 10.3h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

Average sunshine days in September - Clayhill, AL
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (9.1 days).

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

Average cloud cover in September - Clayhill, AL
  • Average cloud cover in September: 34

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 33).

Average visibility in September - Clayhill, AL
  • Average visibility in September: 5mi

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