September weather forecastBryan, TX
September
Weather in September
September, the first month of the autumn in Bryan, is also a hot month, with temperature in the range of an average low of 70.3°F (21.3°C) and an average high of 88.7°F (31.5°C).Temperature
Bryan's transition into September involves a gentle shift in temperature, receding from a torrid 95.5°F (35.3°C) in August to a hot 88.7°F (31.5°C). In September, Bryan experiences a temperature dip to an average of 70.3°F (21.3°C) at night.Heat index
The average heat index in September is appraised at a torrid 102.2°F (39°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In Bryan, the average relative humidity in September is 71%.Rainfall
In Bryan, Texas, in September, during 14.7 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, there are 138.2 rainfall days, and 20.12" (511mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day in Bryan is 12h and 20min.On the first day of September, sunrise is at 7:02 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm CDT.
Sunshine
In Bryan, 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 the ordinary person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bryan, TX
- Average high temperature in September: 88.7°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 (58.1°F).
- Average low temperature in September: 70.3°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.3°F).
Average pressure in September
Bryan, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Bryan, TX
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in September
Bryan, TX
- Average humidity in September: 71%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Bryan, TX
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in September
Bryan, TX
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is September (14.7 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Bryan, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Bryan, 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 March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Bryan, TX
- Average daylight in September: 12h and 18min
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 30min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Bryan, TX
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is September (12.7 days).
Average UV index in September
Bryan, 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
Bryan, TX
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Bryan, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
