September weather forecast
Laredo, TX

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Weather in September

September in Laredo is marked by a minor respite from the summer heat and a pronounced spike in rainfall. Average temperatures wane from 92.5°F (33.6°C) to 76.1°F (24.5°C) as the month progresses. September hosts the highest rainfall of the year with 2.17" (55mm) scattered over nearly 12.9 days. Amid 12.3 hours of daylight, the UV index drops to 7. Relative humidity begins to rise again, averaging 60%.

Temperature

A modest decline in the average high-temperature is seen during September, decreasing from a sweltering 100°F (37.8°C) in August to a tropical 92.5°F (33.6°C). During the nights in September, the temperature in Laredo averages to a moderately hot 76.1°F (24.5°C).

Heat index

The average heat index in September is computed to be a blisteringly hot 105.8°F (41°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In September, the average relative humidity is 60%.

Rainfall

September is the month with the most rainfall. Rain falls for 12.9 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

In Laredo, snow does not fall in March through November.

Daylight

The average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:17 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:24 pm CDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September in Laredo, Texas, is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: An average UV index of 7 in September transforms into this advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

How hot is it in Laredo in September?

In Laredo, 92.5°F (33.6°C) is the average high-temperature and 76.1°F (24.5°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 105.8°F (41°C).

What is the average humidity in September in Laredo?

In September, the average relative humidity in Laredo is 60%.

What is the wettest month in Laredo?

The month with the most rainfall is September, when the rain falls for 12.9 days and typically aggregates up to 2.17" (55mm) of precipitation.

How much does it rain in Laredo in September?

In Laredo, Texas, in September, it is raining for 12.9 days, with typically 2.17" (55mm) of accumulated precipitation.

When it does not snow in Laredo?

In Laredo, snow does not fall in March through November.

How many hours of daylight does Laredo have in September?

In September, the average day length in Laredo is 12h and 19min.

When is the sunrise / sunset in September in Laredo?

On the first day of September, sunrise is at 7:17 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:24 pm CDT.

How long on average sun shines in September in Laredo?

The average sunshine duration in September is 8.6h.

How high is the UV index in September in Laredo?

In Laredo, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Laredo, TX

Average temperature in September - Laredo, TX
  • Average high temperature in September: 92.5°F

The warmest month (with the highest average high temperature) is August (100°F).
The month with the lowest average high temperature is January (66.9°F).

  • Average low temperature in September: 76.1°F

The month with the highest average low temperature is August (79.9°F).
The coldest month (with the lowest average low temperature) is January (50.2°F).

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Average pressure in September
Laredo, TX

Average pressure in September - Laredo, TX
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are May and June (29.86"Hg).

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Average wind speed in September
Laredo, TX

Average wind speed in September - Laredo, TX
  • Average wind speed in September: 10mph

The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is December (8.9mph).

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Average humidity in September
Laredo, TX

Average humidity in September - Laredo, TX
  • Average humidity in September: 60%

The month with the highest relative humidity is December (62%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in September
Laredo, TX

Average rainfall in September - Laredo, TX
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is September (2.17").
The driest month (with the least rainfall) is February (0.43").

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Average rainfall days in September
Laredo, TX

Average rainfall days in September - Laredo, TX
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is September (12.9 days).
The month with the least rainy days is November (5.5 days).

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Average snowfall days in September
Laredo, TX

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

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in September / Average sunshine in September - Laredo, TX
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in September
Laredo, TX

Average sunshine days in September - Laredo, TX
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is September (15.1 days).

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Average UV index in September
Laredo, TX

Average UV index in September - Laredo, TX
  • Average UV index in September: 7

The months with the highest UV index are July and August (UV index 8).
The months with the lowest UV index are January and December (UV index 4).

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Average cloud cover in September
Laredo, TX

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

The month with the most cloud cover is December (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in September
Laredo, TX

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

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

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Laredo, Texas, USA

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