September weather forecast and climate
Hidden Valley, AL

Weather in September

The first month of the autumn, September, is still a hot month in Hidden Valley, Alabama, with average temperature ranging between max 86°F (30°C) and min 66.7°F (19.3°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 86°F (30°C). In Hidden Valley, in September, the average low-temperature is 66.7°F (19.3°C).

Heat index

In September, the average heat index is calculated to 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. 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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, wind, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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, as evaporated sweat carries heat away from the body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

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

Rainfall

The month with the least rainfall in Hidden Valley is September when the rain falls for 14.1 days and typically collects 2.17" (55mm) of precipitation.

Snowfall

In Hidden Valley snow does not fall in April through October.

Daylight

In Hidden Valley, the average length of the day is 12.4h.

Sunshine

The average sunshine in Hidden Valley, Alabama, is 8.8h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
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. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the temperature in September in Hidden Valley?

The average high-temperature, in September, in Hidden Valley, is 86°F (30°C), while the average low-temperature is 66.7°F (19.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines both air temperature and relative humidity, in September is calculated to 96.4°F (35.8°C).

What is the average humidity in September in Hidden Valley?

The average relative humidity in September in Hidden Valley is 73%.

How many days does it rain in September in Hidden Valley?

In September, in Hidden Valley, Alabama, the rain falls for 14.1 days. Throughout September, 2.17" (55mm) of precipitation is accumulated.

What is the driest month in Hidden Valley?

September is the month with the least rainfall in Hidden Valley, Alabama. Rain falls for 14.1 days and accumulates 2.17" (55mm) of precipitation.

When it does not snow in Hidden Valley?

April through October are months without snowfall in Hidden Valley.

How many hours of daylight does Hidden Valley have in September?

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

How many hours of sunshine does Hidden Valley have in September?

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

What is the UV index reading in September in Hidden Valley?

The average daily maximum UV index in September in Hidden Valley is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Hidden Valley, AL

Average temperature in September - Hidden Valley, AL
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in September: 66.7°F

Months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (37°F).

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Average pressure in September
Hidden Valley, AL

Average pressure in September - Hidden Valley, AL
  • Average pressure in September: 30"

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
Hidden Valley, AL

Average wind speed in September - Hidden Valley, AL
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

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Average humidity in September
Hidden Valley, AL

Average humidity in September - Hidden Valley, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Hidden Valley, AL

Average rainfall in September - Hidden Valley, AL
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is September (2.17").

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Average rainfall days in September
Hidden Valley, AL

Average rainfall days in September - Hidden Valley, AL
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (7.9 days).

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Average snowfall in September
Hidden Valley, AL

Average snowfall in September - Hidden Valley, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.51").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Hidden Valley, AL

Average snowfall days in September - Hidden Valley, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.9 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
Hidden Valley, AL

Average daylight in September / Average sunshine in September - Hidden Valley, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in September
Hidden Valley, AL

Average sunshine days in September - Hidden Valley, AL
  • Average sunshine days in September: 13.6 days

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (7.8 days).

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Average UV index in September
Hidden Valley, AL

Average UV index in September - Hidden Valley, AL
  • Average UV index in September: 6

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Hidden Valley, AL

Average cloud cover in September - Hidden Valley, AL
  • Average cloud cover in September: 30

Months with the most cloud cover are February and December (Cloud cover 46).
Months with the least cloud cover are September and October (Cloud cover 30).

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Average visibility in September
Hidden Valley, AL

Average visibility in September - Hidden Valley, 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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