Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the transition into September, Saint Helena notes an average high-temperature of a moderately hot 83.3°F (28.5°C), closely resembling August. In Saint Helena, September's nights observe an average temperature dip to an enjoyable 67.5°F (19.7°C).Heat index
In September, the average heat index is computed to be a tropical 91.4°F (33°C). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Saint Helena, North Carolina, the average relative humidity in September is 78%.Rainfall
In September, in Saint Helena, the rain falls for 13.9 days. Throughout September, 4.17" (106mm) of precipitation is accumulated. Throughout the year, there are 165.3 rainfall days, and 34.21" (869mm) of precipitation is accumulated.Snowfall
In Saint Helena, snow does not fall in April through November.Daylight
In Saint Helena, the average length of the day in September is 12h and 23min.On the first day of September in Saint Helena, sunrise is at 6:45 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
In Saint Helena, North Carolina, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
How hot is September in Saint Helena?
What is the average humidity in September in Saint Helena?
How many days does it rain in September in Saint Helena?
When it does not snow in Saint Helena?
What is the average length of the day in September in Saint Helena?
When is the sunrise / sunset in September in Saint Helena?
How long on average sun shines in September in Saint Helena?
What is the UV index reading in September in Saint Helena?
Average temperature in September
Saint Helena, NC
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (52.7°F).
- Average low temperature in September: 67.5°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 (36.7°F).
Average pressure in September
Saint Helena, NC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January, November and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Saint Helena, NC
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Saint Helena, NC
- Average humidity in September: 78%
The month with the highest relative humidity is August (79%).
The months with the lowest relative humidity are January, February, March and April (74%).
Average rainfall in September
Saint Helena, NC
- Average rainfall in September: 4.17"
The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in September
Saint Helena, NC
- Average rainfall days in September: 13.9 days
The months with the highest number of rainy days are July and August (19.8 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Saint Helena, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Saint Helena, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 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
Saint Helena, NC
- 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Saint Helena, NC
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (8.1 days).
Average UV index in September
Saint Helena, NC
- 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
Saint Helena, NC
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Saint Helena, NC
- 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).
Saint Helena, North Carolina, USA
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