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 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
During September, Alto records an average high-temperature of a still tropical 87.1°F (30.6°C), marking a slight divergence from August's 91.2°F (32.9°C). In the month of September, the average low-temperature in Alto usually rests at a pleasant 68.2°F (20.1°C).Heat index
The heat index in September is computed to be a sweltering 98.6°F (37°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In September, the average relative humidity is 72%.Rainfall
The month with the least rainfall in Alto is September, when the rain falls for 12.1 days and typically collects 1.69" (43mm) of precipitation.Snowfall
In Alto, snow does not fall in April through December.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:31 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September is 9.8h.UV index
In Alto, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
How hot is it in Alto in September?
What is the average humidity in September in Alto?
What is the driest month in Alto?
How much does it rain in Alto in September?
When it does not snow in Alto?
How many hours of daylight does Alto have in September?
What time are sunrise and sunset in September in Alto?
How many hours of sunshine does Alto have in September?
What is the UV index intensity in September in Alto?
Average temperature in September
Alto, LA
- Average high temperature in September: 87.1°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 68.2°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in September
Alto, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Alto, LA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (5.5mph).
Average humidity in September
Alto, LA
- Average humidity in September: 72%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Alto, LA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Alto, LA
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Alto, LA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.16").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Alto, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Alto, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Alto, LA
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Alto, LA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Alto, LA
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and October (Cloud cover 27).
Average visibility in September
Alto, LA
- 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).
Alto, Louisiana, USA
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