September weather forecast
Dalzell, SC

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Weather in September

The first month of the autumn, September, is still a warm month in Dalzell, South Carolina, with an average temperature varying between 83.7°F (28.7°C) and 66.6°F (19.2°C).

Temperature

The arrival of September brings an average high-temperature of a moderately hot 83.7°F (28.7°C), nearly identical to August's 88.9°F (31.6°C). Dalzell's temperature tends to fall to an average low of 66.6°F (19.2°C) during the nights of September.

Heat index

September's mean heat index is evaluated at a tropical 91.4°F (33°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular importance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Dalzell, in September, during 14.1 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 161.8 rainfall days, and 33.35" (847mm) of precipitation is accumulated.

Snowfall

In Dalzell, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of September, sunrise is at 6:55 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:06 pm EDT.

Sunshine

In Dalzell, the average sunshine in September is 8.7h.

UV index

In Dalzell, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: A typical high UV index of 6 in September suggests the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

September temperatures vary between a high-temperature of 83.7°F (28.7°C) and a low-temperature of 66.6°F (19.2°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 91.4°F (33°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

How many days does it rain in September?

In Dalzell, during September, the rain falls for 14.1 days and regularly aggregates up to 2.48" (63mm) of precipitation.

When it does not snow?

In Dalzell, snow does not fall in April through October.

How many hours of daylight does Dalzell have in September?

The average day length in September is 12h and 22min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:55 am and sunset at 7:47 pm. On the last day of the month, in Dalzell, sunrise is at 7:15 am and sunset at 7:06 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.7h.

What is the UV index reading in September?

In Dalzell, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents 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
Dalzell, SC

Average temperature in September - Dalzell, SC
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in September: 66.6°F

The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).

Average pressure in September
Dalzell, SC

Average pressure in September - Dalzell, 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).

Average wind speed in September
Dalzell, SC

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

The windiest months (with the highest average wind speed) are February and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in September
Dalzell, SC

Average humidity in September - Dalzell, SC
  • Average humidity in September: 75%

The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (70%).

Average rainfall in September
Dalzell, SC

Average rainfall in September - Dalzell, SC
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in September
Dalzell, SC

Average rainfall days in September - Dalzell, SC
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is October (8.5 days).

Average snowfall in September
Dalzell, SC

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

The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Dalzell, SC

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

The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Dalzell, 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 4min

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).

Average sunshine days in September
Dalzell, SC

Average sunshine days in September - Dalzell, SC
  • Average sunshine days in September: 13.5 days

The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (8.8 days).

Average UV index in September
Dalzell, SC

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

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

Average cloud cover in September
Dalzell, SC

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

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

Average visibility in September
Dalzell, SC

Average visibility in September - Dalzell, 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).

Dalzell, South Carolina, USA

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