September weather forecast
Marion, SC

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Marion, South Carolina, with an average temperature ranging between max 83.3°F (28.5°C) and min 66.2°F (19°C).

Temperature

Marion, South Carolina, indicates an average high-temperature of a moderately hot 83.3°F (28.5°C) in September, showing minor variation from August's 88.3°F (31.3°C). Marion reports an average nighttime low-temperature of 66.2°F (19°C) in September.

Heat index

For September, the heat index is appraised at a hot 91.4°F (33°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.

Humidity

The months with the highest humidity in Marion are May, August and September, with an average relative humidity of 78%.

Rainfall

In Marion, in September, it is raining for 15.5 days, with typically 3.15" (80mm) of accumulated precipitation. In Marion, during the entire year, the rain falls for 171 days and collects up to 34.29" (871mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

The average length of the day in September in Marion is 12h and 23min.
On the first day of the month, sunrise is at 6:51 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:02 pm EDT.

Sunshine

In Marion, the average sunshine in September is 9.3h.

UV index

In September, the average daily maximum UV index in Marion is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during September translates into the following guidance:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

How hot is it in Marion in September?

In September, the average high-temperature and low-temperature are 83.3°F (28.5°C) and 66.2°F (19°C) respectively. In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is appraised at 91.4°F (33°C).

What is the most humid month in Marion?

The months with the highest humidity are May, August and September, with an average relative humidity of 78%.

What is the average humidity in September in Marion?

In Marion, the average relative humidity in September is 78%.

How much does it rain in Marion in September?

In Marion, in September, it is raining for 15.5 days, with typically 3.15" (80mm) of accumulated precipitation.

When it does not snow in Marion?

April through November are months without snowfall.

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

In September, the average day length in Marion is 12h and 23min.

What time are sunrise and sunset in September in Marion?

In September, on the first day of the month, sunrise is at 6:51 am and sunset at 7:43 pm. On the last day of the month, in Marion, sunrise is at 7:11 am and sunset at 7:02 pm EDT.

How long on average sun shines in September in Marion?

The average sunshine duration in September in Marion, South Carolina, is 9.3h.

What is the UV index reading in September in Marion?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's 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
Marion, SC

Average temperature in September - Marion, SC
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (52.3°F).

  • Average low temperature in September: 66.2°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).

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Average pressure in September
Marion, SC

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

The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Marion, SC

Average wind speed in September - Marion, SC
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Marion, SC

Average humidity in September - Marion, SC
  • Average humidity in September: 78%

The months with the highest relative humidity are May, August and September (78%).
The months with the lowest relative humidity are January and November (73%).

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Average rainfall in September
Marion, SC

Average rainfall in September - Marion, SC
  • Average rainfall in September: 3.15"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.54").

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Average rainfall days in September
Marion, SC

Average rainfall days in September - Marion, SC
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is October (8.7 days).

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Average snowfall in September
Marion, SC

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

The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Marion, SC

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

The months with the highest number of snowfall days are January and February (0.7 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
Marion, SC

Average daylight in September / Average sunshine in September - Marion, 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: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

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Average sunshine days in September
Marion, SC

Average sunshine days in September - Marion, SC
  • Average sunshine days in September: 12.7 days

The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (8 days).

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Average UV index in September
Marion, SC

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

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).

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Average cloud cover in September
Marion, SC

Average cloud cover in September - Marion, SC
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 29).

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Average visibility in September
Marion, SC

Average visibility in September - Marion, 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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Marion, South Carolina, USA

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