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
Robert notes an average high-temperature of a still tropical 88°F (31.1°C) in September, displaying minor variation from August. Robert experiences a mean temperature of 70.7°F (21.5°C) during September nights.Heat index
For most parts of September, the heat index is computed to be a blistering 104°F (40°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
The average relative humidity in September in Robert is 77%.Rainfall
In Robert, in September, it is raining for 16.7 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, there are 163.3 rainfall days, and 27.64" (702mm) of precipitation is accumulated.Snowfall
In Robert, snow does not fall in February through November.Daylight
In Robert, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:38 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:47 pm CDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Robert, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 6 in September leads to these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Robert have in September?
When 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
Robert, LA
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in September
Robert, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
Robert, LA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in September
Robert, LA
- Average humidity in September: 77%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Robert, LA
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is July (3.9").
The driest month (with the least rainfall) is November (1.14").
Average rainfall days in September
Robert, LA
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is August (20.7 days).
The month with the least rainy days is November (7.6 days).
Average snowfall in September
Robert, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Robert, LA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Robert, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 4min
The months with the most sunshine are June and August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Robert, LA
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (7.9 days).
Average UV index in September
Robert, LA
- Average UV index in September: 6
The months with the highest UV index are May, 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
Robert, LA
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Robert, LA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, April, June, August, October, November and December (6mi).
The months with the lowest visibility are March, May, July and September (5mi).
Robert, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location