September weather forecast and climate
Mason, TX

Weather in September

The first month of the autumn, September, is also a hot month in Mason, Texas, with temperature in the range of an average low of 68.4°F (20.2°C) and an average high of 86.9°F (30.5°C).

Temperature

In Mason, the average high-temperature in September marginally drops, from a hot 94.5°F (34.7°C) in August, to a still tropical 86.9°F (30.5°C). In Mason, in September, the average low-temperature is 68.4°F (20.2°C).

Heat index

The average heat index in September is appraised at a tropical 94.1°F (34.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With 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 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, wind, clothing, and activity influence one's weather impression. 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

In September, the average relative humidity in Mason is 63%.

Rainfall

In Mason, during 13.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 111.3 rainfall days, and 17.13" (435mm) of precipitation is accumulated.

Snowfall

In Mason snow does not fall in March through November.

Daylight

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

Sunshine

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for the ordinary person.
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 Mason?

The average high-temperature, in September, in Mason, is 86.9°F (30.5°C), while the average low-temperature is 68.4°F (20.2°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, is appraised at 94.1°F (34.5°C).

What is the average humidity in September in Mason?

In September, the average relative humidity is 63%.

How many days does it rain in September in Mason?

In Mason, in September, during 13.3 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

When it does not snow in Mason?

In Mason, Texas, snow does not fall in March through November.

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

In Mason, the average length of the day in September is 12.3h.

How many hours of sunshine does Mason have in September?

The average sunshine in September in Mason is 8.7h.

What is the UV index intensity in September in Mason?

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

Average temperature in September
Mason, TX

Average temperature in September - Mason, TX
  • Average high temperature in September: 86.9°F

The warmest months (with the highest average high temperature) are July and August (94.5°F).
The month with the lowest average high temperature is January (59.4°F).

  • Average low temperature in September: 68.4°F

The month with the highest average low temperature is August (73.6°F).
The coldest month (with the lowest average low temperature) is January (40.3°F).

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Average pressure in September
Mason, TX

Average pressure in September - Mason, TX
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is January (30.15").
Months with the lowest atmospheric pressure are May and June (29.89").

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Average wind speed in September
Mason, TX

Average wind speed in September - Mason, TX
  • Average wind speed in September: 8.3mph

The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).

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Average humidity in September
Mason, TX

Average humidity in September - Mason, TX
  • Average humidity in September: 63%

The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is August (53%).

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Average rainfall in September
Mason, TX

Average rainfall in September - Mason, TX
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is November (0.63").

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Average rainfall days in September
Mason, TX

Average rainfall days in September - Mason, TX
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in September
Mason, TX

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

The month with the highest snowfall is February (0.24").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Mason, TX

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

The month with the highest number of snowfall days is February (0.9 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
Mason, TX

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

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days in September
Mason, TX

Average sunshine days in September - Mason, TX
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is January (24.6 days).
The month with the least sunshine days is May (14.3 days).

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Average UV index in September
Mason, TX

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

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

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Average cloud cover in September
Mason, TX

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

Months with the most cloud cover are March and May (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in September
Mason, TX

Average visibility in September - Mason, 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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