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
The shift into September reveals an average high-temperature of a still tropical 88.7°F (31.5°C), closely mirroring August's climate. Simpson's nights in September cool down to an average low-temperature of 68.7°F (20.4°C).Heat index
September's heat index is evaluated at a blistering 105.8°F (41°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a single figure representing how weather conditions feel when combining temperature and humidity. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. 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. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In September, the average relative humidity is 75%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. In Simpson, during the entire year, the rain falls for 156.9 days and collects up to 25.98" (660mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In Simpson, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:57 pm CDT.
Sunshine
In Simpson, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Simpson in September?
What is the average humidity in September?
How much does it rain in Simpson in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Simpson, LA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in September: 68.7°F
The month with the highest average low temperature is August (73.2°F).
The coldest month (with the lowest average low temperature) is January (41°F).
Average pressure in September
Simpson, LA
- Average pressure in September: 29.96"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
Simpson, LA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in September
Simpson, LA
- Average humidity in September: 75%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Simpson, LA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is November (1.34").
Average rainfall days in September
Simpson, LA
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in September
Simpson, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Simpson, LA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Simpson, 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 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Simpson, LA
- Average sunshine days in September: 12 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is August (9.8 days).
Average UV index in September
Simpson, 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
Simpson, LA
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Simpson, LA
- Average visibility in September: 5mi
The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).
Simpson, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location