Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition into September reveals an average high-temperature of a still tropical 86.7°F (30.4°C), mirroring a close resemblance to August. Throughout September nights, Columbia experiences a consistent temperature average of 69.4°F (20.8°C).Heat index
The heat index in September is estimated at a fiery hot 98.6°F (37°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In September, the average relative humidity is 74%.Rainfall
In September, the rain falls for 15.1 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, there are 164 rainfall days, and 31.81" (808mm) of precipitation is accumulated.Snowfall
In Columbia, snow does not fall in March through December.Daylight
In Columbia, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:03 pm. On the last day of September, sunrise is at 6:33 am and sunset at 6:26 pm CDT.
Sunshine
The average sunshine in September 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 threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 6 transforms into the following advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Columbia have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
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
The 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"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
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%
The months with the highest relative humidity are August and December (76%).
The 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").
The 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).
The 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: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
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
The months with the highest UV index are May, June, July and August (UV index 7).
The 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
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Columbia, Alabama, USA
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