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 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
September's weather records an average high-temperature of a still hot 86.2°F (30.1°C), showing little deviation from August. An average low-temperature of 73.9°F (23.3°C) is common during the nights of September.Heat index
The average heat index in September is evaluated at a very hot 98.6°F (37°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
In Wallisville, the average relative humidity in September is 77%.Rainfall
In Wallisville, during September, the rain falls for 14.3 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, in Wallisville, there are 128.1 rainfall days, and 13.11" (333mm) of precipitation is accumulated.Snowfall
January, September and December are months with snowfall. September is the first month it typically snows. Throughout September, there are 0.1 snowfall days. Throughout the year, there are 0.4 snowfall days.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:56 am and sunset at 7:40 pm. On the last day of September, in Wallisville, sunrise is at 7:12 am and sunset at 7:05 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 6 suggests these recommendations:
Deflect overexposure. Sun protection is a necessity. 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. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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 many days does it rain in September?
When does it start snowing in Wallisville?
How many hours of daylight does Wallisville have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Wallisville have in September?
How high is the UV index in September?
Average temperature in September
Wallisville, TX
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is January (59.5°F).
- Average low temperature in September: 73.9°F
The months with the highest average low temperature are July and August (78.1°F).
The coldest month (with the lowest average low temperature) is January (47.1°F).
Average pressure in September
Wallisville, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Wallisville, TX
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are August and September (6.8mph).
Average humidity in September
Wallisville, TX
- Average humidity in September: 77%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Wallisville, TX
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is March (0.51").
Average rainfall days in September
Wallisville, TX
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is August (16.1 days).
The month with the least rainy days is November (7.5 days).
Average snowfall days in September
Wallisville, TX
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Wallisville, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Wallisville, TX
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is August (10.4 days).
Average UV index in September
Wallisville, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Wallisville, TX
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Wallisville, 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).
Wallisville, Texas, USA
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