September weather forecast
Lago Vista, TX

Weather in September

The first month of the autumn, September, is still a hot month in Lago Vista, Texas, with temperature in the range of an average low of 69.8°F (21°C) and an average high of 87.8°F (31°C).

Temperature

In Lago Vista, the average high-temperature in September slightly decreases, from a sweltering 95.5°F (35.3°C) in August, to a tropical 87.8°F (31°C). The average low-temperature,, is 69.8°F (21°C).

Heat index

In September, the average heat index is evaluated at a torrid 98.1°F (36.7°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. 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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, wind). 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. 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 normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. 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

The average relative humidity in September is 67%.

Rainfall

In Lago Vista, Texas, during September, the rain falls for 14.3 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, in Lago Vista, there are 137.4 rainfall days, and 24.13" (613mm) of precipitation is accumulated.

Snowfall

March through December are months without snowfall.

Daylight

The average length of the day in Lago Vista is 12.3h.

Sunshine

The average sunshine in September is 8.3h.

UV index

In Lago Vista, Texas, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Lago Vista?

In Lago Vista, in September, the average high-temperature is 87.8°F (31°C), and the average low-temperature is 69.8°F (21°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 98.1°F (36.7°C).

What is the average humidity in September in Lago Vista?

The average relative humidity in September in Lago Vista is 67%.

How many days does it rain in September in Lago Vista?

In Lago Vista, Texas, in September, during 14.3 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

When it does not snow in Lago Vista?

In Lago Vista snow does not fall in March through December.

What is the average length of the day in September in Lago Vista?

In Lago Vista, Texas, the average length of the day in September is 12.3h.

How many hours of sunshine does Lago Vista have in September?

The average sunshine in September in Lago Vista, Texas, is 8.3h.

How high is the UV index in September in Lago Vista?

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

Average temperature in September
Lago Vista, TX

Average temperature in September - Lago Vista, TX
  • Average high temperature in September: 87.8°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 (58.8°F).

  • Average low temperature in September: 69.8°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 (41.9°F).

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Average pressure in September
Lago Vista, TX

Average pressure in September - Lago Vista, 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 (29.91").

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Average wind speed in September
Lago Vista, TX

Average wind speed in September - Lago Vista, TX
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is March (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).

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Average humidity in September
Lago Vista, TX

Average humidity in September - Lago Vista, TX
  • Average humidity in September: 67%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in September
Lago Vista, TX

Average rainfall in September - Lago Vista, TX
  • Average rainfall in September: 3.03"

The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days in September
Lago Vista, TX

Average rainfall days in September - Lago Vista, TX
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (8.2 days).

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Average snowfall in September
Lago Vista, TX

Average snowfall in September - Lago Vista, 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, November and December (0").

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Average snowfall days in September
Lago Vista, TX

Average snowfall days in September - Lago Vista, 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 March, April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Lago Vista, TX

Average daylight in September / Average sunshine in September - Lago Vista, 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: 8.3h

The month with the most sunshine is July (Average sunshine: 10.4h).
Months with the least sunshine are November and December (Average sunshine: 5.4).

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Average sunshine days in September
Lago Vista, TX

Average sunshine days in September - Lago Vista, TX
  • Average sunshine days in September: 13.1 days

The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is May (12.5 days).

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Average UV index in September
Lago Vista, TX

Average UV index in September - Lago Vista, 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
Lago Vista, TX

Average cloud cover in September - Lago Vista, TX
  • Average cloud cover in September: 33

Months with the most cloud cover are March and May (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in September
Lago Vista, TX

Average visibility in September - Lago Vista, 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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