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 modest decline in the average high-temperature is seen during September, decreasing from a sweltering 95.5°F (35.3°C) in August to a tropical 87.6°F (30.9°C). South Mountain registers a consistent average low-temperature of 70.7°F (21.5°C) during September.Heat index
For September, the heat index is evaluated at a very hot 96.8°F (36°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
In South Mountain, the average relative humidity in September is 64%.Rainfall
In September, the rain falls for 13.8 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. In South Mountain, during the entire year, the rain falls for 129.1 days and collects up to 25.71" (653mm) of precipitation.Snowfall
In South Mountain, Texas, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 7:07 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:16 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain 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 reading in September?
Average temperature in September
South Mountain, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).
Average pressure in September
South Mountain, 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 (29.91"Hg).
Average wind speed in September
South Mountain, TX
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is March (11mph).
The calmest month (with the lowest average wind speed) is September (7.3mph).
Average humidity in September
South Mountain, TX
- Average humidity in September: 64%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
South Mountain, TX
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is October (3.86").
The driest month (with the least rainfall) is November (1.18").
Average rainfall days in September
South Mountain, TX
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
South Mountain, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
South Mountain, 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 and October (0 days).
Average daylight in September /
Average sunshine in September
South Mountain, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 3min
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
South Mountain, TX
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in September
South Mountain, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
South Mountain, TX
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
South Mountain, 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).
South Mountain, Texas, USA
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