September weather forecast and climate
Columbia, AL

The first month of the autumn, September, is also a hot month in Columbia, Alabama, with average temperature fluctuating between 86.7°F (30.4°C) and 69.4°F (20.8°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still tropical 86.7°F (30.4°C). In September, in Columbia, the average low-temperature is 69.4°F (20.8°C).

Heat index

The average heat index is estimated at a torrid 98.8°F (37.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', '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 metabolic differences, pregnancy, clothing, 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. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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 Columbia, Alabama, is 74%.

Rainfall

In Columbia, in September, during 15.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Columbia, during the entire year, the rain falls for 164 days and collects up to 31.81" (808mm) of precipitation.

Snowfall

In Columbia, Alabama, snow does not fall in March through December.

Daylight

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

Sunshine

In September, the average sunshine in Columbia is 8.8h.

UV index

In Columbia, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
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 Columbia?

In September, the average high-temperature is 86.7°F (30.4°C), and the average low-temperature is 69.4°F (20.8°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in September is appraised at 98.8°F (37.1°C).

What is the average humidity in September in Columbia?

The average relative humidity in September in Columbia is 74%.

How many days does it rain in September in Columbia?

In Columbia, in September, it is raining for 15.1 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow in Columbia?

March through December are months without snowfall in Columbia, Alabama.

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

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

How many hours of sunshine does Columbia have in September?

The average sunshine in September in Columbia is 8.8h.

How high is the UV index in September in Columbia?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Columbia, AL
  • Average high temperature in September: 86.7°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (57.7°F).

  • Average low temperature in September: 69.4°F

Months with the highest average low temperature are July and August (73.2°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average pressure in September - Columbia, AL
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.98").

Average wind speed in September - Columbia, AL
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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

Months with the highest relative humidity are August and December (76%).
Months with the lowest relative humidity are May and October (69%).

Average rainfall in September - Columbia, AL
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is November (1.5").

Average rainfall days in September - Columbia, AL
  • Average rainfall days in September: 15.1 days

The month with the highest number of rainy days is August (21.4 days).
The month with the least rainy days is November (7.5 days).

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

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

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

The month with the highest number of snowfall days is January (0.2 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.4h).

Average sunshine days in September - Columbia, AL
  • Average sunshine days in September: 12.9 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (7 days).

Average UV index in September - Columbia, AL
  • Average UV index in September: 6

Months with the highest UV index are May, 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 - Columbia, AL
  • Average cloud cover in September: 29

The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).

Average visibility in September - Columbia, 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).