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
In Trinity, the average high-temperature in September gently drops from a torrid 96.3°F (35.7°C) in August to a hot 89.6°F (32°C). The nighttime temperature, during September, averages of 69.3°F (20.7°C).Heat index
In September, the average heat index is evaluated at a blistering 107.6°F (42°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. 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.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In Trinity, the average relative humidity in September is 73%.Rainfall
In Trinity, Texas, in September, during 16.9 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. Throughout the year, there are 168.8 rainfall days, and 34.33" (872mm) of precipitation is accumulated.Snowfall
In Trinity, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:07 pm CDT.
Sunshine
In Trinity, the average sunshine in September is 8.8h.UV index
In Trinity, Texas, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 6 during September leads to these instructions:
Fend off overexposure. Sun protection is vital. 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. 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
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Trinity have in September?
How high is the UV index in September?
Average temperature in September
Trinity, TX
- Average high temperature in September: 89.6°F
The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (57.9°F).
- Average low temperature in September: 69.3°F
The months with the highest average low temperature are July and August (73.8°F).
The coldest month (with the lowest average low temperature) is January (41.2°F).
Average pressure in September
Trinity, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Trinity, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).
Average humidity in September
Trinity, TX
- Average humidity in September: 73%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Trinity, TX
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in September
Trinity, TX
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is September (16.9 days).
The month with the least rainy days is October (11.7 days).
Average snowfall in September
Trinity, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Trinity, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 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
Trinity, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Trinity, TX
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in September
Trinity, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Trinity, TX
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Trinity, TX
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (5mi).
Trinity, Texas, USA
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