September weather forecast and climate
Jackson, MS

The view of the Capitol building in Jackson, Mississippi, from a beautiful tree park
The view of the Capitol building in Jackson, Mississippi, from a beautiful tree park
The first month of the autumn, September, is still a tropical month in Jackson, Mississippi, with average temperature varying between 87.3°F (30.7°C) and 67.5°F (19.7°C).

Temperature

In Jackson, the average high-temperature is almost the same as in August - a still hot 87.3°F (30.7°C). The average low-temperature, in Jackson, is 67.5°F (19.7°C).

Heat index

The average heat index is appraised at a sweltering 99.9°F (37.7°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, pregnancy, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Jackson, the average relative humidity is 73%.

Rainfall

In Jackson, during September, the rain falls for 11.9 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Jackson, there are 152.1 rainfall days, and 29.72" (755mm) of precipitation is accumulated.

Snowfall

In Jackson, Mississippi, snow does not fall in March through December.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine in Jackson is 9.7h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Jackson?

In Jackson, in September, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 67.5°F (19.7°C). The average heat index (a.k.a. 'real feel', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, in September is evaluated at 99.9°F (37.7°C).

What is the average humidity in September in Jackson?

In Jackson, the average relative humidity in September is 73%.

How much does it rain in Jackson in September?

In Jackson, Mississippi, in September, it is raining for 11.9 days, with typically 1.89" (48mm) of accumulated precipitation.

When it does not snow in Jackson?

March through December are months without snowfall in Jackson.

How many hours of daylight does Jackson have in September?

The average length of the day in September in Jackson is 12.4h.

How many hours of sunshine does Jackson have in September?

The average sunshine in September in Jackson is 9.7h.

What is the UV index reading in September in Jackson?

In September, the average daily maximum UV index in Jackson, Mississippi, is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Jackson, MS
  • Average high temperature in September: 30.7°C

The warmest months (with the highest average high temperature) are July and August (33.2°C).
The month with the lowest average high temperature is January (12.6°C).

  • Average low temperature in September: 19.7°C

The month with the highest average low temperature is July (22.4°C).
The coldest month (with the lowest average low temperature) is January (3.6°C).

Average pressure in September - Jackson, MS
  • Average pressure in September: 1015.6mbar

The month with the highest atmospheric pressure is January (1021.8mbar).
The month with the lowest atmospheric pressure is June (1014.7mbar).

Average wind speed in September - Jackson, MS
  • Average wind speed in September: 8.5km/h

The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest months (with the lowest average wind speed) are July and August (8.2km/h).

Average humidity in September - Jackson, MS
  • Average humidity in September: 73%

Months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (69%).

Average rainfall in September - Jackson, MS
  • Average rainfall in September: 48mm

The wettest month (with the highest rainfall) is April (88mm).
The driest month (with the least rainfall) is October (46mm).

Average rainfall days in September - Jackson, MS
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is October (8.5 days).

Average snowfall in September - Jackson, MS
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (9mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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

The month with the highest number of snowfall days is January (1 days).
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 - Jackson, MS
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in September - Jackson, MS
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is October (21.4 days).
The month with the least sunshine days is July (11.8 days).

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

Average cloud cover in September - Jackson, MS
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 28).

Average visibility in September - Jackson, MS
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).