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
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a tropical 94.5°F (34.7°C) in August to a still hot 88.9°F (31.6°C). In the month of September, the average low-temperature in La Salle usually rests at an agreeable 73.2°F (22.9°C).Heat index
In September, the average heat index is calculated to be a blistering 105.8°F (41°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.For clarity, heat index numbers account for light winds and areas under shade. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
The average relative humidity in September is 74%.Rainfall
In La Salle, during September, the rain falls for 14.7 days and regularly aggregates up to 0.79" (20mm) of precipitation. 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
In September, the average length of the day is 12h and 19min.On the first day of September, sunrise is at 7:05 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:13 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 6 transforms into the following advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
How hot is September in La Salle?
What is the average humidity in September in La Salle?
How many days does it rain in September in La Salle?
When it does not snow in La Salle?
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 long on average sun shines in September in La Salle?
How high is the UV index in September in La Salle?
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
Weather forecast for your location
2. Allow the app to use your location