September weather forecast and climate
Cahaba Heights, AL

The first month of the autumn, September, is also a moderately hot month in Cahaba Heights, Alabama, with average temperature fluctuating between 66.2°F (19°C) and 85.1°F (29.5°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a warm 85.1°F (29.5°C). In September, in Cahaba Heights, the average low-temperature is 66.2°F (19°C).

Heat index

The average heat index is appraised at a hot 93.7°F (34.3°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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, differences in body mass, height, and shape, clothing, and metabolic differences affect individual temperature impact. 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. 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

In Cahaba Heights, Alabama, the average relative humidity in September is 72%.

Rainfall

In Cahaba Heights, during September, the rain falls for 12.1 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Cahaba Heights, Alabama, during the entire year, the rain falls for 147 days and collects up to 19.06" (484mm) of precipitation.

Snowfall

In Cahaba Heights snow does not fall in April through November.

Daylight

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

Sunshine

The average sunshine in Cahaba Heights is 8.7h.

UV index

The average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.

What is the temperature in September in Cahaba Heights?

In September, in Cahaba Heights, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 66.2°F (19°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines relative humidity and air temperature, in September is calculated to 93.7°F (34.3°C).

What is the average humidity in September in Cahaba Heights?

In September, the average relative humidity in Cahaba Heights, Alabama, is 72%.

How many days does it rain in September in Cahaba Heights?

In Cahaba Heights, Alabama, in September, it is raining for 12.1 days, with typically 1.18" (30mm) of accumulated precipitation.

When it does not snow in Cahaba Heights?

April through November are months without snowfall in Cahaba Heights, Alabama.

How many hours of daylight does Cahaba Heights have in September?

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

How many hours of sunshine does Cahaba Heights have in September?

The average sunshine in September is 8.7h.

What is the UV index intensity in September in Cahaba Heights?

The average daily maximum UV index in September in Cahaba Heights is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Cahaba Heights, AL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (51.3°F).

  • Average low temperature in September: 66.2°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (36°F).

Average pressure in September - Cahaba Heights, AL
  • Average pressure in September: 30.01"

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

Average wind speed in September - Cahaba Heights, AL
  • Average wind speed in September: 5mph

The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Cahaba Heights, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Cahaba Heights, AL
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is October (1.02").

Average rainfall days in September - Cahaba Heights, AL
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is November (7.3 days).

Average snowfall in September - Cahaba Heights, AL
  • Average snowfall in September: 0"

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

Average snowfall days in September - Cahaba Heights, 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).

Average daylight in September / Average sunshine in September - Cahaba Heights, 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: 8.7h

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

Average sunshine days in September - Cahaba Heights, AL
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (9.4 days).

Average UV index in September - Cahaba Heights, AL
  • Average UV index in September: 6

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September - Cahaba Heights, AL
  • Average cloud cover in September: 31

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

Average visibility in September - Cahaba Heights, 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).