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 shift from August to September includes a small decrease in the average high-temperature, from a torrid 97°F (36.1°C) to a tropical 90°F (32.2°C). In September, the nighttime temperature in Atascosa lowers to an average of 71.8°F (22.1°C).Heat index
September's heat index is estimated at a blistering 104°F (40°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In Atascosa, Texas, the average relative humidity in September is 66%.Rainfall
In Atascosa, during September, the rain falls for 16.5 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 139.6 rainfall days, and 20.2" (513mm) of precipitation is accumulated.Snowfall
In Atascosa, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 19min.On the first day of September in Atascosa, sunrise is at 7:12 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:21 pm CDT.
Sunshine
In Atascosa, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September in Atascosa is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
How hot is it in Atascosa in September?
What is the average humidity in September in Atascosa?
How many days does it rain in September in Atascosa?
When it does not snow in Atascosa?
How many hours of daylight does Atascosa have in September?
What time are sunrise and sunset in September in Atascosa?
How many hours of sunshine does Atascosa have in September?
What is the UV index intensity in September in Atascosa?
Average temperature in September
Atascosa, TX
- Average high temperature in September: 90°F
The warmest month (with the highest average high temperature) is August (97°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in September: 71.8°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in September
Atascosa, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Atascosa, TX
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is May (9.4mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in September
Atascosa, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (71%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Atascosa, TX
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Atascosa, TX
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is September (16.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Atascosa, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Atascosa, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Atascosa, 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: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Atascosa, TX
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Atascosa, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Atascosa, TX
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Atascosa, 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).
Atascosa, Texas, USA
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