September weather forecastBellville, TX
September
Weather in September
September, the first month of the autumn in Bellville, is still a tropical month, with temperature in the range of an average low of 70.7°F (21.5°C) and an average high of 88.5°F (31.4°C).Temperature
September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's very hot 95°F (35°C) to a tropical 88.5°F (31.4°C). Bellville, during the nights of September, experiences an average temperature drop to a pleasant 70.7°F (21.5°C).Heat index
The heat index in September is computed to be a blisteringly hot 104°F (40°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Bellville, Texas, in September, it is raining for 18.2 days, with typically 3.5" (89mm) of accumulated precipitation. In Bellville, during the entire year, the rain falls for 175.5 days and collects up to 32.64" (829mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In September, the average length of the day in Bellville is 12h and 20min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of September, in Bellville, sunrise is at 7:18 am and sunset at 7:11 pm CDT.
Sunshine
In Bellville, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Bellville is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bellville, TX
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (59.7°F).
- Average low temperature in September: 70.7°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 (43.5°F).
Average pressure in September
Bellville, 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 (29.93"Hg).
Average wind speed in September
Bellville, TX
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is September (5.8mph).
Average humidity in September
Bellville, TX
- Average humidity in September: 75%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Bellville, TX
- Average rainfall in September: 3.5"
The wettest month (with the highest rainfall) is May (4.76").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in September
Bellville, TX
- Average rainfall days in September: 18.2 days
The month with the highest number of rainy days is September (18.2 days).
The month with the least rainy days is January (11.8 days).
Average snowfall in September
Bellville, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Bellville, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.4 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
Bellville, 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 month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Bellville, TX
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is January (17.5 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in September
Bellville, 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
Bellville, TX
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Bellville, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, August, September, October, November and December (6mi).
The months with the lowest visibility are March, April, May, June and July (5mi).
