September weather forecastBlenheim, SC
September
Weather in September
September, the first month of the autumn in Blenheim, is also a moderately hot month, with an average temperature ranging between min 66°F (18.9°C) and max 82.9°F (28.3°C).Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a hot 88.3°F (31.3°C) in August to a warm 82.9°F (28.3°C). During September, Blenheim observes a consistent average nighttime temperature of 66°F (18.9°C).Heat index
In September, the heat index is appraised at a tropical 89.6°F (32°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
The months with the highest humidity are May, August, September and December, with an average relative humidity of 76%.Rainfall
In Blenheim, during September, the rain falls for 14.1 days and regularly aggregates up to 2.99" (76mm) of precipitation. Throughout the year, in Blenheim, there are 157 rainfall days, and 32.36" (822mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Blenheim is 12h and 23min.On the first day of September in Blenheim, South Carolina, sunrise is at 6:52 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:03 pm EDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blenheim, SC
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (50.9°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Blenheim, 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 (29.96"Hg).
Average wind speed in September
Blenheim, SC
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Blenheim, SC
- Average humidity in September: 76%
The months with the highest relative humidity are May, August, September and December (76%).
The month with the lowest relative humidity is November (72%).
Average rainfall in September
Blenheim, SC
- Average rainfall in September: 2.99"
The wettest month (with the highest rainfall) is August (3.98").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in September
Blenheim, SC
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in September
Blenheim, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Blenheim, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 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
Blenheim, 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: 9h and 18min
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
Blenheim, SC
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is October (21.3 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in September
Blenheim, 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
Blenheim, SC
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 29).
Average visibility in September
Blenheim, 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).
