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
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a tropical 87.6°F (30.9°C) in August to a warm 81.1°F (27.3°C). Throughout September, an average low-temperature of 61.3°F (16.3°C) is experienced in Lewisville.Heat index
The heat index in September is estimated at a hot 86°F (30°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
The average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.01" (51mm) of precipitation.Snowfall
In Lewisville, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:06 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index in Lewisville is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Lewisville have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Lewisville have in September?
What is the UV index intensity in September?
Average temperature in September
Lewisville, NC
- Average high temperature in September: 81.1°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 (45.9°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Lewisville, NC
- Average pressure in September: 30.05"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
Lewisville, NC
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Lewisville, NC
- Average humidity in September: 74%
The months with the highest relative humidity are May and December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Lewisville, NC
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is April (3.07").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Lewisville, NC
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Lewisville, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lewisville, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 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
Lewisville, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 4min
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
Lewisville, NC
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in September
Lewisville, 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, February and December (UV index 2).
Average cloud cover in September
Lewisville, NC
- Average cloud cover in September: 35
The months with the most cloud cover are February and March (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in September
Lewisville, 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).
Lewisville, North Carolina, USA
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