September weather forecast and climate
Columbia, SC

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, the first month of the autumn, in Columbia, is still a warm month, with average temperature fluctuating between 84.6°F (29.2°C) and 67.5°F (19.7°C).

Temperature

In September, the average high-temperature slightly decreases, from a hot 90.1°F (32.3°C) in August, to a warm 84.6°F (29.2°C). In September, in Columbia, the average low-temperature is 67.5°F (19.7°C).

Heat index

The average heat index in September is appraised at a hot 92.5°F (33.6°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 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, differences in body mass, height, and shape, wind). 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.

Humidity

The average relative humidity in September is 72%.

Rainfall

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

Snowfall

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

Daylight

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

Sunshine

The average sunshine in Columbia is 8.5h.

UV index

The average daily maximum UV index in Columbia is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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 Columbia?

In September, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 67.5°F (19.7°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, is appraised at 92.5°F (33.6°C).

What is the average humidity in September in Columbia?

In September, the average relative humidity is 72%.

How many days does it rain in September in Columbia?

In Columbia, in September, it is raining for 11 days, with typically 1.46" (37mm) of accumulated precipitation.

What is the driest month in Columbia?

The month with the least rainfall in Columbia is September when the rain falls for 11 days and typically collects 1.46" (37mm) of precipitation.

When it does not snow in Columbia?

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

How many hours of daylight does Columbia have in September?

The average length of the day in September in Columbia, South Carolina, is 12.4h.

How many hours of sunshine does Columbia have in September?

In September, the average sunshine in Columbia is 8.5h.

What is the UV index reading in September in Columbia?

In Columbia, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

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"

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

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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%).
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").
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).
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: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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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

Months with the highest UV index are June, July and August (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
Columbia, SC

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

Months with the most cloud cover are February and December (Cloud cover 42).
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

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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