Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the onset of September, La Salle experiences a modest temperature adjustment, with the average high-temperature gently receding from a tropical 94.5°F (34.7°C) in August to a still hot 88.9°F (31.6°C). La Salle experiences an average low-temperature of 73.2°F (22.9°C) in month of September.Heat index
In September, the average heat index is evaluated at an extremely hot 105.8°F (41°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
The average relative humidity in September is 74%.Rainfall
In September, the rain falls for 14.7 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. In La Salle, during the entire year, the rain falls for 103.6 days and collects up to 7.4" (188mm) of precipitation.Snowfall
In La Salle, 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 7:05 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:13 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In La Salle, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September in La Salle?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September in La Salle?
What time are sunrise and sunset in September in La Salle?
How many hours of sunshine does La Salle have in September?
How high is the UV index in September?
Average temperature in September
La Salle, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (94.5°F).
The month with the lowest average high temperature is January (61.9°F).
- Average low temperature in September: 73.2°F
The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (46.6°F).
Average pressure in September
La Salle, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
La Salle, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
La Salle, TX
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (78%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in September
La Salle, TX
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is October (1.02").
The driest month (with the least rainfall) is February (0.28").
Average rainfall days in September
La Salle, TX
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is September (14.7 days).
The months with the least rainy days are January and February (5.8 days).
Average snowfall days in September
La Salle, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January, February and December (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
La Salle, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
La Salle, TX
- Average sunshine days in September: 12 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is September (12 days).
Average UV index in September
La Salle, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
La Salle, TX
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
La Salle, 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).
La Salle, Texas, USA
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