September weather forecastSeguin, TX
September
Weather in September
September, the first month of the autumn in Seguin, is still a hot month, with an average temperature fluctuating between 89.1°F (31.7°C) and 71.1°F (21.7°C).Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a fiery hot 96.6°F (35.9°C) in August to a tropical 89.1°F (31.7°C). During September nights, Seguin records an average temperature of 71.1°F (21.7°C).Heat index
September's mean heat index is evaluated at a very hot 102.2°F (39°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
In September, the average relative humidity in Seguin is 69%.Rainfall
In Seguin, in September, it is raining for 15.4 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 147.1 rainfall days, and 21.26" (540mm) of precipitation is accumulated.Snowfall
In Seguin, Texas, snow does not fall in March through November.Daylight
In Seguin, Texas, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:09 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:18 pm CDT.
Sunshine
In Seguin, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index in Seguin is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Seguin, TX
- Average high temperature in September: 89.1°F
The warmest month (with the highest average high temperature) is August (96.6°F).
The month with the lowest average high temperature is January (60.6°F).
- Average low temperature in September: 71.1°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (44.1°F).
Average pressure in September
Seguin, 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 (29.9"Hg).
Average wind speed in September
Seguin, TX
- Average wind speed in September: 6.1mph
The windiest months (with the highest average wind speed) are February and March (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).
Average humidity in September
Seguin, TX
- Average humidity in September: 69%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Seguin, TX
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in September
Seguin, TX
- Average rainfall days in September: 15.4 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Seguin, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (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
Seguin, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Seguin, TX
- Average daylight in September: 12h and 18min
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 24min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Seguin, TX
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Seguin, 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
Seguin, TX
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Seguin, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, July, August, September, October, November and December (6mi).
The months with the lowest visibility are April, May and June (5mi).
