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
Alto's September reports an average high-temperature of a still tropical 87.1°F (30.6°C), exhibiting a minor difference from August. Alto's temperature lowers to a mean of 68.2°F (20.1°C) during the nights in September.Heat index
The heat index value for September is estimated at a very hot 98.6°F (37°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.The standards for the heat index are set for locations in shade and under light breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'real feel', quantifies the warmth felt when relative humidity is considered. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
In Alto, the average relative humidity in September is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 12.1 days and accumulates 1.69" (43mm) of precipitation.Snowfall
April through December are months without snowfall.Daylight
In Alto, 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
In September, the average sunshine is 9.8h.UV index
In Alto, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. 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. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Alto have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
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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