September weather forecast
Columbia, SC

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The Us State House of South Carolina, in Columbia, with the Wade Hampton Statue
The Us State House of South Carolina, in Columbia, with the Wade Hampton Statue

Weather in September

September in Columbia, South Carolina signals the onset of autumn. The high averages decrease to 84.6°F (29.2°C) giving respite from the summer heat. The average% of possible sunshine drops when compared to August. The rainfall day count drops significantly offering drier conditions. Wind speeds slightly rise promising a refreshing touch to the weather.

Temperature

September in Columbia witnesses a gentle descent in average high-temperature, descending from August's tropical 90.1°F (32.3°C) to a warm 84.6°F (29.2°C). Columbia encounters an average low-temperature of 67.5°F (19.7°C) during September nights.

Heat index

During September, the heat index is evaluated at a hot 93.2°F (34°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

The average relative humidity in September is 72%.

Rainfall

September is the month with the least rainfall. Rain falls for 11 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

In Columbia, snow does not fall in March through November.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of September in Columbia, sunrise is at 6:58 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:09 pm EDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

In September, the average daily maximum UV index in Columbia is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

How hot is September in Columbia?

In Columbia, 84.6°F (29.2°C) is the average high-temperature and 67.5°F (19.7°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 93.2°F (34°C).

What is the average humidity in September in Columbia?

In September, the average relative humidity in Columbia, South Carolina, is 72%.

What is the driest month in Columbia?

September is the month with the least rainfall. Rain falls for 11 days and accumulates 1.46" (37mm) of precipitation.

How much does it rain in Columbia in September?

In September, in Columbia, the rain falls for 11 days. Throughout September, 1.46" (37mm) of precipitation is accumulated.

When it does not snow in Columbia?

March through November are months without snowfall in Columbia.

How many hours of daylight does Columbia have in September?

In September, the average day length is 12h and 22min.

When is the sunrise / sunset in September in Columbia?

In September, on the first day of the month, sunrise is at 6:58 am and sunset at 7:49 pm. On the last day of the month, in Columbia, sunrise is at 7:18 am and sunset at 7:09 pm EDT.

How long on average sun shines in September in Columbia?

The average sunshine duration in September is 8.5h.

What is the UV index intensity 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 threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Columbia, SC

Average temperature in September - Columbia, SC
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in September: 67.5°F

The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).

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Average pressure in September
Columbia, SC

Average pressure in September - Columbia, SC
  • Average pressure in September: 30.01"Hg

The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in September
Columbia, SC

Average wind speed in September - Columbia, SC
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Columbia, SC

Average humidity in September - Columbia, SC
  • Average humidity in September: 72%

The month with the highest relative humidity is December (74%).
The months with the lowest relative humidity are January, July and November (69%).

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Average rainfall in September
Columbia, SC

Average rainfall in September - Columbia, SC
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.46").

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Average rainfall days in September
Columbia, SC

Average rainfall days in September - Columbia, SC
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is October (7.3 days).

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Average snowfall in September
Columbia, SC

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

The month with the highest snowfall is February (0.47").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Columbia, SC

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

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Columbia, SC

Average daylight in September / Average sunshine in September - Columbia, SC
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 3min

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 18min).

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Average sunshine days in September
Columbia, SC

Average sunshine days in September - Columbia, SC
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is October (22.7 days).
The month with the least sunshine days is July (11.7 days).

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Average UV index in September
Columbia, SC

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

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

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Average cloud cover in September
Columbia, SC

Average cloud cover in September - Columbia, SC
  • Average cloud cover in September: 32

The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are June and October (Cloud cover 29).

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Average visibility in September
Columbia, SC

Average visibility in September - Columbia, SC
  • 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).

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Columbia, South Carolina, USA

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