Columbia
South Carolina, USA
Long-term weather forecast
Long-term weather forecast

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

Temperature

In Columbia, 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). The average low-temperature, in September, is 67.5°F (19.7°C).

Heat index

The average heat index is evaluated at a hot 92.5°F (33.6°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, clothing, differences in body mass, height, and shape), and activity. 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 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 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 in Columbia.

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 the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
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.

What is the temperature in September in Columbia?

The average high-temperature, in September, in Columbia, South Carolina, is 84.6°F (29.2°C), while the average low-temperature is 67.5°F (19.7°C). The average heat index (a.k.a. 'feels like', 'real feel'), that combines relative humidity and air temperature, in September 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%.

How much does it rain in Columbia in September?

In Columbia, South Carolina, 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, South Carolina, is September when the rain falls for 11 days and typically collects 1.46" (37mm) of precipitation.

When it does not snow in Columbia?

March through November are months without snowfall in Columbia, South Carolina.

How many hours of daylight does Columbia have in September?

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

How long on average sun shines in September in Columbia?

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

How high is the UV index in September in Columbia?

The average daily maximum UV index in September in Columbia, South Carolina, is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Columbia, SC
  • Average high temperature in September: 29.2°C

The warmest month (with the highest average high temperature) is July (33.1°C).
The month with the lowest average high temperature is January (11.6°C).

  • Average low temperature in September: 19.7°C

The month with the highest average low temperature is July (23.2°C).
The coldest month (with the lowest average low temperature) is January (3.3°C).

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%).

Average rainfall in September - Columbia, SC
  • Average rainfall in September: 37mm

The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the lowest rainfall) is September (37mm).

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 lowest number of rainy days is October (7.3 days).

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

The month with the highest snowfall is February (12mm).
Months with the lowest snowfall are March, April, May, June, July, August, September, October and November (0mm).

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 lowest number of snowfall days are April, May, June, July, August, September, October and November (0 days).

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 shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.5h

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

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).