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
September's onset introduces a mild reduction in the average high-temperature, from a very hot 95.2°F (35.1°C) in August to a tropical 87.3°F (30.7°C). In September, the temperature drops to an average of 68.9°F (20.5°C) at night.Heat index
In September, the average heat index is estimated at a sweltering 96.8°F (36°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in September is 66%.Rainfall
In September, the rain falls for 13 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. In Marble Falls, during the entire year, the rain falls for 115.1 days and collects up to 16.85" (428mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
In Marble Falls, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:10 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:19 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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 in Marble Falls?
When it does not snow?
What is the average length of the day in September?
What time 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
Marble Falls, TX
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (41.2°F).
Average pressure in September
Marble Falls, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Marble Falls, TX
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in September
Marble Falls, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Marble Falls, TX
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.62").
The driest months (with the least rainfall) are February, November and December (0.71").
Average rainfall days in September
Marble Falls, TX
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in September
Marble Falls, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Marble Falls, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 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
Marble Falls, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 5h and 42min).
Average sunshine days in September
Marble Falls, TX
- Average sunshine days in September: 15 days
The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Marble Falls, 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
Marble Falls, TX
- Average cloud cover in September: 31
The month with the most cloud cover is May (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Marble Falls, 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).
Marble Falls, Texas, USA
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