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
In Gilliam, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's hot 94.6°F (34.8°C) to a still tropical 88.7°F (31.5°C). September presents a pronounced difference from daytime highs, with a consistent average low-temperature of 67.1°F (19.5°C).Heat index
For most parts of September, the heat index is estimated at a sweltering 102.2°F (39°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In September, the average relative humidity is 69%.Rainfall
The month with the least rainfall in Gilliam is September, when the rain falls for 11.4 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Gilliam, snow does not fall in April through November.Daylight
In Gilliam, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:50 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:00 pm CDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
What is the driest month in Gilliam?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Gilliam have in September?
What time are sunrise and sunset in September in Gilliam?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Gilliam, LA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (37.8°F).
Average pressure in September
Gilliam, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Gilliam, LA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Gilliam, LA
- Average humidity in September: 69%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Gilliam, LA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is April (4.84").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Gilliam, LA
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in September
Gilliam, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Gilliam, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Gilliam, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Gilliam, LA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Gilliam, 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, February and December (UV index 3).
Average cloud cover in September
Gilliam, LA
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Gilliam, LA
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Gilliam, Louisiana, USA
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