September weather forecast
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

The first month of the autumn, September, is still a warm month in Columbia, South Carolina, with temperature in the range of an average high of 84.6°F (29.2°C) and an average low of 67.5°F (19.7°C).

Temperature

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

Heat index

The average heat index in September is evaluated 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', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, metabolic differences). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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

In Columbia, 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

March through November are months without snowfall.

Daylight

The average length of the day in September in Columbia is 12h and 22min.
On the first day of the month, sunrise is at 6:57 am and sunset at 7:50 pm. On the last day of September, in Columbia, sunrise is at 7:18 am and sunset at 7:10 pm EDT.

Sunshine

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

UV index

In Columbia, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the temperature in September in Columbia?

In September, in Columbia, South Carolina, 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. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 92.5°F (33.6°C).

What is the average humidity in September in Columbia?

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

What is the driest month in Columbia?

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

How many days does it rain in September in Columbia?

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

When it does not snow in Columbia?

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

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

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

What time are sunrise and sunset in September in Columbia?

On the first day of September, sunrise is at 6:57 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:10 pm EDT.

How many hours of sunshine does Columbia have in September?

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

What is the UV index reading in September in Columbia?

The average daily maximum UV index in September in Columbia, South Carolina, is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to 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"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 22min

The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).

  • 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

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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