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
As September arrives, Cornelius's weather displays a minor decrease in high-temperatures, transitioning from August's tropical 88.3°F (31.3°C) to a moderately hot 82.2°F (27.9°C). An average nighttime temperature of 62.4°F (16.9°C) is recorded in Cornelius during September.Heat index
September's mean heat index is estimated at a hot 87.8°F (31°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Cornelius, North Carolina, in September, during 12.8 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Cornelius, during the entire year, the rain falls for 159.6 days and collects up to 33.07" (840mm) of precipitation.Snowfall
In Cornelius, snow does not fall in April through October.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 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index in Cornelius, North Carolina, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September leads to these advisories:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the average September temperature in Cornelius?
What is the average humidity in September in Cornelius?
How many days does it rain in September in Cornelius?
When it does not snow in Cornelius?
What is the average length of the day in September in Cornelius?
When are sunrise and sunset in September in Cornelius?
How long on average sun shines in September in Cornelius?
What is the UV index intensity in September in Cornelius?
Average temperature in September
Cornelius, NC
- Average high temperature in September: 82.2°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 (47.5°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in September
Cornelius, NC
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Cornelius, NC
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Cornelius, NC
- Average humidity in September: 74%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are June and July (70%).
Average rainfall in September
Cornelius, NC
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is October (2.13").
Average rainfall days in September
Cornelius, NC
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is August (18 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Cornelius, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.13").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Cornelius, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 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
Cornelius, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 3min
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 6min).
Average sunshine days in September
Cornelius, NC
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Cornelius, NC
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Cornelius, NC
- Average cloud cover in September: 36
The months with the most cloud cover are February, March and December (Cloud cover 44).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in September
Cornelius, 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).
Cornelius, North Carolina, USA
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