September weather forecastD'Iberville, MS
September
Weather in September
In September, D'Iberville starts to bid goodbye to summer with a slight fall in temperature, marking the beginning of autumn. A decrease in temperature is felt as the highs drop down to 86.4°F (30.2°C), a notable shift from August's heat. With fewer daylight hours and a decline in humidity, the atmosphere begins to feel comfortably cooler. Rainfall occurrences continue, acting as harbingers of the coming fall. The city takes a serene turn with this cooler weather, adding to the charm of D'Iberville.Temperature
D'Iberville's September showcases an average high-temperature of a still tropical 86.4°F (30.2°C), hardly distinct from August's 89.8°F (32.1°C). Throughout September, an average low-temperature of 73.9°F (23.3°C) is expected.Heat index
For most parts of September, the heat index is calculated to be a sweltering 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. 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 extremely vital to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. 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 the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
In D'Iberville, the average relative humidity in September is 74%.Rainfall
In D'Iberville, in September, during 19.1 rainfall days, 4.53" (115mm) of precipitation is typically accumulated. In D'Iberville, during the entire year, the rain falls for 177.4 days and collects up to 39.96" (1015mm) of precipitation.Snowfall
February through December are months without snowfall.Ocean temperature
In D'Iberville, in September, the average water temperature is 83.1°F (28.4°C).Note: For engaging in water activities including swimming and diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are perceived as perfect, providing pleasure for extended durations.
Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
D'Iberville, MS
- Average high temperature in September: 86.4°F
The warmest months (with the highest average high temperature) are July and August (89.8°F).
The month with the lowest average high temperature is January (59°F).
- Average low temperature in September: 73.9°F
The months with the highest average low temperature are July and August (77.7°F).
The coldest month (with the lowest average low temperature) is January (45.9°F).
Average pressure in September
D'Iberville, MS
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in September
D'Iberville, MS
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in September
D'Iberville, MS
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
D'Iberville, MS
- Average rainfall in September: 4.53"
The wettest month (with the highest rainfall) is August (6.38").
The driest month (with the least rainfall) is November (1.54").
Average rainfall days in September
D'Iberville, MS
- Average rainfall days in September: 19.1 days
The month with the highest number of rainy days is August (24.2 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in September
D'Iberville, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
D'Iberville, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
D'Iberville, MS
- Average sea temperature in September: 83.1°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is January (56.5°F).
Average daylight in September /
Average sunshine in September
D'Iberville, MS
- Average daylight in September: 12h and 18min
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 42min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
D'Iberville, MS
- Average sunshine days in September: 9 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (4.9 days).
Average UV index in September
D'Iberville, MS
- 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 4).
Average cloud cover in September
D'Iberville, MS
- Average cloud cover in September: 27
The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 23).
Average visibility in September
D'Iberville, MS
- 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).
