September weather forecast
New Braunfels, TX

September brings an easing of summer's intensity in New Braunfels. The city witnesses a shift in temperatures, registering a more manageable average high of 88.3°F (31.3°C). The fall in temperature is accompanied by an increased cloud cover contributing a cooling effect. The increasingly shorter daylight hours reflect the receding summer influence. Moving towards the tail end of September, the weather gears up for more comfortable conditions that hallmark the month of October.

Temperature

A mild drop in New Braunfels's average high-temperature is observed in September, transitioning from a torrid 96.3°F (35.7°C) in August to a tropical 88.3°F (31.3°C). New Braunfels experiences an average low-temperature of 70.7°F (21.5°C) in month of September.

Heat index

September's heat index is evaluated at a torrid 100.4°F (38°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In New Braunfels, the average relative humidity in September is 69%.

Rainfall

In New Braunfels, in September, during 12.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In New Braunfels, during the entire year, the rain falls for 93.3 days and collects up to 7.95" (202mm) of precipitation.

Snowfall

April through December are months without snowfall.

Daylight

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 7:54 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:18 pm CDT.

Sunshine

In September, the average sunshine is 8.4h.

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 radiation for the ordinary person.
Note: The maximum UV index of 6 during September translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.