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
A moderate decline in average high-temperatures is noted in September, moving from a tropical 92.1°F (33.4°C) in August to a moderately hot 84.7°F (29.3°C). In the month of September, Lewisville witnesses a consistent average low-temperature of 64°F (17.8°C).Heat index
In September, the heat index is evaluated at a hot 91.4°F (33°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. 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 are extremely significant for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Humidity
The average relative humidity in September in Lewisville is 70%.Rainfall
In Lewisville, in September, during 9.4 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 102.8 rainfall days, and 11.3" (287mm) of precipitation is accumulated.Snowfall
In Lewisville, 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 6:54 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:05 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 in September translates into this advice:
Undertake precautions - Guarding against sun damage is counselled. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in Lewisville in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Lewisville, OK
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (48.2°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in September
Lewisville, OK
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Lewisville, OK
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Lewisville, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Lewisville, OK
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is May (1.46").
The driest months (with the least rainfall) are January, February and November (0.67").
Average rainfall days in September
Lewisville, OK
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in September
Lewisville, OK
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lewisville, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Lewisville, OK
- 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: 9h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Lewisville, OK
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is January (22.9 days).
The month with the least sunshine days is July (16.6 days).
Average UV index in September
Lewisville, OK
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Lewisville, OK
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Lewisville, OK
- 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, Oklahoma, USA
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