September weather forecast
Powell, TX

Weather in September

The first month of the autumn, September, is still a tropical month in Powell, Texas, with average temperature ranging between min 69.6°F (20.9°C) and max 88.7°F (31.5°C).

Temperature

In Powell, Texas, the average high-temperature in September marginally drops, from a torrid 95.5°F (35.3°C) in August, to a hot 88.7°F (31.5°C). In Powell, in September, the average low-temperature is 69.6°F (20.9°C).

Heat index

In September, the average heat index is computed to be a very hot 100.4°F (38°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, differences in body mass, height, and shape), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Powell, the average relative humidity in September is 67%.

Rainfall

In Powell, during 11.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Powell, Texas, during the entire year, the rain falls for 113.6 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

In Powell snow does not fall in April through December.

Daylight

In Powell, the average length of the day is 12.3h.

Sunshine

In Powell, the average sunshine in September is 8.5h.

UV index

In Powell, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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.
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FAQ

What is the temperature in September in Powell?

In Powell, Texas, in September, the average high-temperature is 88.7°F (31.5°C), and the average low-temperature is 69.6°F (20.9°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in September is computed to be 100.4°F (38°C).

What is the average humidity in September in Powell?

In Powell, the average relative humidity in September is 67%.

How many days does it rain in September in Powell?

In Powell, Texas, in September, during 11.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

When it does not snow in Powell?

In Powell, Texas, snow does not fall in April through December.

How many hours of daylight does Powell have in September?

The average length of the day in September in Powell, Texas, is 12.3h.

How many hours of sunshine does Powell have in September?

The average sunshine in September in Powell is 8.5h.

How high is the UV index in September in Powell?

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Powell, TX

Average temperature in September - Powell, TX
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (55.8°F).

  • Average low temperature in September: 69.6°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).

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Average pressure in September
Powell, TX

Average pressure in September - Powell, TX
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Powell, TX

Average wind speed in September - Powell, TX
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).

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Average humidity in September
Powell, TX

Average humidity in September - Powell, TX
  • Average humidity in September: 67%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (61%).

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Average rainfall in September
Powell, TX

Average rainfall in September - Powell, TX
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is October (2.48").
The driest month (with the least rainfall) is January (0.79").

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Average rainfall days in September
Powell, TX

Average rainfall days in September - Powell, TX
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (12.9 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in September
Powell, TX

Average snowfall in September - Powell, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.16").
Months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Powell, TX

Average snowfall days in September - Powell, TX
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.5 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Powell, TX

Average daylight in September / Average sunshine in September - Powell, TX
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is August (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in September
Powell, TX

Average sunshine days in September - Powell, TX
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is May (14.7 days).

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Average UV index in September
Powell, TX

Average UV index in September - Powell, TX
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in September
Powell, TX

Average cloud cover in September - Powell, TX
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in September
Powell, TX

Average visibility in September - Powell, TX
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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