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
With the onset of September, Houston's average high-temperature slightly adjusts, moderately receding from August's tropical 90.9°F (32.7°C) to a moderately hot 84.4°F (29.1°C). During September, the average low-temperature in Houston, Arkansas, is an enjoyable 63°F (17.2°C).Heat index
The heat index value for September is estimated at a tropical 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Being under direct sunlight might amplify the heat index by 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. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
The average relative humidity in September is 73%.Rainfall
September is the month with the least rainfall in Houston. Rain falls for 11.4 days and accumulates 1.93" (49mm) of precipitation.Snowfall
In Houston, snow does not fall in April through October.Daylight
The average length of the day in September in Houston is 12h and 23min.On the first day of September in Houston, sunrise is at 6:44 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:55 pm CDT.
Sunshine
The average sunshine in September is 9.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
How hot is it in Houston in September?
What is the average humidity in September in Houston?
What is the driest month in Houston?
How many days does it rain in September in Houston?
When it does not snow in Houston?
What is the average length of the day in September in Houston?
What time are sunrise and sunset in September in Houston?
How long on average sun shines in September in Houston?
How high is the UV index in September in Houston?
Average temperature in September
Houston, AR
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (47.7°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in September
Houston, AR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Houston, AR
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Houston, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are July and October (72%).
Average rainfall in September
Houston, AR
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Houston, AR
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in September
Houston, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Houston, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.7 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
Houston, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Houston, AR
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Houston, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Houston, AR
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Houston, AR
- 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).
Houston, Arkansas, USA
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