September weather forecastHenderson, TX
September
Weather in September
The first month of the autumn, September, is still a tropical month in Henderson, Texas, with an average temperature fluctuating between 88.5°F (31.4°C) and 67.6°F (19.8°C).Temperature
With the onset of September, Henderson experiences a modest temperature adjustment, with the average high-temperature gently receding from a hot 94.6°F (34.8°C) in August to a still tropical 88.5°F (31.4°C). In Henderson, an average temperature of 67.6°F (19.8°C) is noted during September nights.Heat index
The heat index value for September is appraised at a fiery hot 102.2°F (39°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
In September, the average relative humidity is 70%.Rainfall
September is the month with the least rainfall. Rain falls for 12.2 days and accumulates 1.5" (38mm) of precipitation.Snowfall
April through December are months without snowfall in Henderson.Daylight
In Henderson, Texas, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:43 pm. On the last day of September, in Henderson, Texas, sunrise is at 7:12 am and sunset at 7:04 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index in Henderson is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Henderson, TX
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is August (94.6°F).
The month with the lowest average high temperature is January (55°F).
- Average low temperature in September: 67.6°F
The month with the highest average low temperature is August (73.2°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure in September
Henderson, 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
Henderson, TX
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.2mph).
Average humidity in September
Henderson, TX
- Average humidity in September: 70%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Henderson, TX
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Henderson, TX
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is August (13.9 days).
The month with the least rainy days is October (8.6 days).
Average snowfall in September
Henderson, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.31").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Henderson, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Henderson, TX
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Henderson, TX
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is February (13.7 days).
Average UV index in September
Henderson, TX
- Average UV index in September: 6
The months with the highest UV index are May, 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
Henderson, TX
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Henderson, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
