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 Huntsville, the average high-temperature in September slightly decreases from a very hot 95.9°F (35.5°C) in August to a hot 89.4°F (31.9°C). In Huntsville, in September, the average low-temperature is 69.4°F (20.8°C).Heat index
In September, the average heat index is computed to be an extremely hot 105.8°F (41°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, clothing, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.
Humidity
In September, the average relative humidity is 73%.Rainfall
In September, the rain falls for 17 days. Throughout September, 3.19" (81mm) of precipitation is accumulated. Throughout the year, there are 167.1 rainfall days, and 33.54" (852mm) of precipitation is accumulated.Snowfall
In Huntsville, Texas, snow does not fall in March through November.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:45 pm. On the last day of September, in Huntsville, Texas, sunrise is at 7:15 am and sunset at 7:09 pm CDT.
Sunshine
In September, the average sunshine in Huntsville, Texas, is 8.6h.UV index
In September, the average daily maximum UV index in Huntsville is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
FAQ
What is the temperature in September in Huntsville?
What is the average humidity in September in Huntsville?
How many days does it rain in September in Huntsville?
When it does not snow in Huntsville?
How many hours of daylight does Huntsville have in September?
What time are sunrise and sunset in September in Huntsville?
How long on average sun shines in September in Huntsville?
What is the UV index reading in September in Huntsville?
Average temperature in September
Huntsville, TX
- Average high temperature in September: 89.4°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 69.4°F
The months with the highest average low temperature are July and August (73.9°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Huntsville, 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
Huntsville, TX
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is September (5.1mph).
Average humidity in September
Huntsville, TX
- Average humidity in September: 73%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Huntsville, TX
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in September
Huntsville, TX
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is September (17 days).
The months with the least rainy days are January and October (11.3 days).
Average snowfall in September
Huntsville, 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
Huntsville, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 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
Huntsville, 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 4min
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 0min).
Average sunshine days in September
Huntsville, TX
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is September (10.4 days).
Average UV index in September
Huntsville, 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
Huntsville, TX
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Huntsville, TX
- Average visibility in September: 5mi
The months with the highest visibility are January, August, October and November (6mi).
The months with the lowest visibility are February, March, April, May, June, July, September and December (5mi).
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