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 very hot 95.7°F (35.4°C) in August to a hot 87.6°F (30.9°C). Throughout September nights, Wilmer registers an average low-temperature of 69.8°F (21°C).Heat index
The heat index in September is estimated at a torrid 96.8°F (36°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
The average relative humidity in September is 65%.Rainfall
In Wilmer, Texas, in September, during 12.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 114.9 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
In Wilmer, snow does not fall in March through December.Daylight
In Wilmer, Texas, the average length of the day in September is 12h and 22min.On the first day of September in Wilmer, sunrise is at 7:02 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:12 pm CDT.
Sunshine
In Wilmer, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Wilmer is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Wilmer in September?
What is the average humidity in September in Wilmer?
How much does it rain in Wilmer in September?
When it does not snow in Wilmer?
What is the average length of the day in September in Wilmer?
What time are sunrise and sunset in September in Wilmer?
How long on average sun shines in September in Wilmer?
What is the UV index reading in September in Wilmer?
Average temperature in September
Wilmer, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (54.9°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (39°F).
Average pressure in September
Wilmer, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Wilmer, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Wilmer, TX
- Average humidity in September: 65%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Wilmer, TX
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in September
Wilmer, TX
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is September (12.5 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Wilmer, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Wilmer, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Wilmer, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 3min
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
Wilmer, TX
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is September (14.8 days).
Average UV index in September
Wilmer, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Wilmer, TX
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Wilmer, TX
- 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).
Wilmer, Texas, USA
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