September weather forecast and climate
Houston, AR

Weather in September

The first month of the autumn, September, is still a warm month in Houston, Arkansas, with average temperature fluctuating between 84.4°F (29.1°C) and 63°F (17.2°C).

Temperature

In September, the average high-temperature marginally drops, from a tropical 90.9°F (32.7°C) in August, to a moderately hot 84.4°F (29.1°C). In September, the average low-temperature is 63°F (17.2°C).

Heat index

In September, the average heat index is evaluated at a hot 92.3°F (33.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, metabolic differences, 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.

Humidity

The average relative humidity in September is 73%.

Rainfall

The month with the least rainfall is September when the rain falls for 11.4 days and typically collects 1.93" (49mm) of precipitation.

Snowfall

In Houston snow does not fall in April through October.

Daylight

The average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 9.7h.

UV index

In Houston, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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.
[Resources]

FAQ

What is the temperature in September in Houston?

In Houston, Arkansas, in September, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 63°F (17.2°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines both air temperature and relative humidity, is estimated at 92.3°F (33.5°C).

What is the average humidity in September in Houston?

In Houston, the average relative humidity in September is 73%.

How much does it rain in Houston in September?

In Houston, Arkansas, in September, it is raining for 11.4 days, with typically 1.93" (49mm) of accumulated precipitation.

What is the driest month in Houston?

The month with the least rainfall in Houston, Arkansas, is September when the rain falls for 11.4 days and typically collects 1.93" (49mm) of precipitation.

When it does not snow in Houston?

In Houston, Arkansas, snow does not fall in April through October.

What is the average length of the day in September in Houston?

The average length of the day in September in Houston is 12.4h.

How long on average sun shines in September in Houston?

In Houston, Arkansas, the average sunshine in September is 9.7h.

How high is the UV index in September in Houston?

In Houston, Arkansas, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV rays.

Average temperature in September
Houston, AR

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).

[Resources]

Average pressure in September
Houston, AR

Average pressure in September - Houston, AR
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.94").

[Resources]

Average wind speed in September
Houston, AR

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).

[Resources]

Average humidity in September
Houston, AR

Average humidity in September - Houston, AR
  • Average humidity in September: 73%

The month with the highest relative humidity is March (79%).
Months with the lowest relative humidity are July and October (72%).

[Resources]

Average rainfall in September
Houston, AR

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").

[Resources]

Average rainfall days in September
Houston, AR

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).

[Resources]

Average snowfall in September
Houston, AR

Average snowfall in September - Houston, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.91").
Months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Houston, AR

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).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Houston, AR

Average daylight in September / Average sunshine in September - Houston, AR
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5.3h).

[Resources]

Average sunshine days in September
Houston, AR

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).

[Resources]

Average UV index in September
Houston, AR

Average UV index in September - Houston, AR
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

[Resources]

Average cloud cover in September
Houston, AR

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).

[Resources]

Average visibility in September
Houston, AR

Average visibility in September - Houston, AR
  • Average visibility in September: 6mi

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).

[Resources]