September weather forecastLancaster, SC
September
Weather in September
September begins to introduce Lancaster's autumn, as it experiences a significant decrease in temperatures. Despite this, the city continues to enjoy a fair amount of sunshine hours. A slight rise in wind speed accompanies the drop in temperature, adding a cool breeze to the air. Rainfall levels see a sharp decrease, leading to less humid days. Temperatures fluctuate between 64.9°F (18.3°C) and 82.9°F (28.3°C), hinting at the impending fall season.Temperature
With the onset of September, Lancaster's average high-temperature slightly adjusts, moderately receding from August's hot 88.3°F (31.3°C) to a moderately hot 82.9°F (28.3°C). Lancaster, during September nights, observes an average temperature of 64.9°F (18.3°C).Heat index
For most parts of September, the heat index is calculated to be a hot 89.6°F (32°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
In September, the average relative humidity is 73%.Rainfall
September is the month with the least rainfall in Lancaster. Rain falls for 9.6 days and accumulates 0.51" (13mm) of precipitation.Snowfall
In Lancaster, snow does not fall in March through December.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:56 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:08 pm EDT.
Sunshine
In Lancaster, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. 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. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lancaster, SC
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.8°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).
Average pressure in September
Lancaster, SC
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Lancaster, SC
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are February and April (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Lancaster, SC
- Average humidity in September: 73%
The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).
Average rainfall in September
Lancaster, SC
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days in September
Lancaster, SC
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (5.9 days).
Average snowfall in September
Lancaster, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Lancaster, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 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
Lancaster, SC
- Average daylight in September: 12h and 24min
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 54min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Lancaster, SC
- Average sunshine days in September: 18.3 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Lancaster, 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).
Average cloud cover in September
Lancaster, SC
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Lancaster, 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).
