September weather forecast
Jennings, MS

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Weather in September

The first month of the autumn, September, is still a tropical month in Jennings, Mississippi, with temperature in the range of an average low of 68°F (20°C) and an average high of 86.9°F (30.5°C).

Temperature

The onset of September notes an average high-temperature of a still hot 86.9°F (30.5°C), subtly shifted from August's 90.3°F (32.4°C). During the month of September, the temperature falls to an average of 68°F (20°C).

Heat index

For most parts of September, the heat index is appraised at a very hot 102.2°F (39°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 16.3 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. In Jennings, during the entire year, the rain falls for 159.9 days and collects up to 22.83" (580mm) of precipitation.

Snowfall

In Jennings, Mississippi, snow does not fall in April through November.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:47 pm CDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 6 in September translates into the following instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

Jennings in September has an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 68°F (20°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in September is appraised at 102.2°F (39°C).

What is the average humidity in September?

In Jennings, the average relative humidity in September is 78%.

How much does it rain in September?

In Jennings, in September, during 16.3 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

When it does not snow?

April through November are months without snowfall.

What is the average length of the day in September?

In Jennings, the average day length in September is 12h and 20min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:37 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:47 pm CDT.

How long on average sun shines in September in Jennings?

The average sunshine duration in September is 9.1h.

What is the UV index reading in September?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average max. wind speed
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Jennings, MS

Average temperature in September - Jennings, MS
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (56.7°F).

  • Average low temperature in September: 68°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).

Average pressure in September
Jennings, MS

Average pressure in September - Jennings, MS
  • 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
Jennings, MS

Average wind speed in September - Jennings, MS
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

Average humidity in September
Jennings, MS

Average humidity in September - Jennings, MS
  • Average humidity in September: 78%

The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Jennings, MS

Average rainfall in September - Jennings, MS
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is November (1.1").

Average rainfall days in September
Jennings, MS

Average rainfall days in September - Jennings, MS
  • Average rainfall days in September: 16.3 days

The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is November (7.5 days).

Average snowfall in September
Jennings, MS

Average snowfall in September - Jennings, MS
  • Average snowfall in September: 0"

The months with the highest snowfall are January and December (0.2").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Jennings, MS

Average snowfall days in September - Jennings, MS
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and December (0.3 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
Jennings, MS

Average daylight in September / Average sunshine in September - Jennings, MS
  • 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 1min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days in September
Jennings, MS

Average sunshine days in September - Jennings, MS
  • Average sunshine days in September: 11.5 days

The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is July (8 days).

Average UV index in September
Jennings, MS

Average UV index in September - Jennings, MS
  • Average UV index in September: 6

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

Average cloud cover in September
Jennings, MS

Average cloud cover in September - Jennings, MS
  • Average cloud cover in September: 34

The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 30).

Average visibility in September
Jennings, MS

Average visibility in September - Jennings, MS
  • 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).

Jennings, Mississippi, USA

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