September weather forecast
Jackson, MS

The Capitol building and beautiful tree park in Jackson, Mississippi
The Capitol building and beautiful tree park in Jackson, Mississippi

Weather in September

The first month of the autumn, September, is also a hot month in Jackson, Mississippi, with temperature in the range of an average high of 87.3°F (30.7°C) and an average low of 67.5°F (19.7°C).

Temperature

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

Heat index

In September, the average heat index is computed to be a torrid 100.4°F (38°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, pregnancy, metabolic differences). 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in September in Jackson is 73%.

Rainfall

In Jackson, during 11.9 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Jackson, during the entire year, the rain falls for 152.1 days and collects up to 29.72" (755mm) of precipitation.

Snowfall

March through December are months without snowfall in Jackson, Mississippi.

Daylight

The average length of the day in September is 12h and 21min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

Sunshine

The average sunshine in September is 9.7h.

UV index

In Jackson, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
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.
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FAQ

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. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is computed to be 100.4°F (38°C).

What is the average humidity in September in Jackson?

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

How much does it rain in Jackson in September?

In Jackson, in September, during 11.9 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow in Jackson?

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

How many hours of daylight does Jackson have in September?

The average day length in September in Jackson is 12h and 21min.

When are sunrise and sunset in September in Jackson?

On the first day of September, sunrise is at 6:35 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

How many hours of sunshine does Jackson have in September?

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

What is the UV index intensity in September in Jackson?

In Jackson, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Jackson, MS

Average temperature in September - Jackson, MS
  • Average high temperature in September: 87.3°F

The warmest months (with the highest average high temperature) are July and August (91.8°F).
The month with the lowest average high temperature is January (54.7°F).

  • Average low temperature in September: 67.5°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 (38.5°F).

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Average pressure in September
Jackson, MS

Average pressure in September - Jackson, MS
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Jackson, MS

Average wind speed in September - Jackson, MS
  • Average wind speed in September: 5.3mph

The windiest months (with the highest average wind speed) are January and February (8mph).
The calmest months (with the lowest average wind speed) are July and August (5.1mph).

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Average humidity in September
Jackson, MS

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

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

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Average rainfall in September
Jackson, MS

Average rainfall in September - Jackson, MS
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is April (3.46").
The driest month (with the least rainfall) is October (1.81").

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Average rainfall days in September
Jackson, MS

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).

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Average snowfall in September
Jackson, MS

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

The month with the highest snowfall is January (0.35").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Jackson, MS

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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Jackson, MS

Average daylight in September / Average sunshine in September - Jackson, MS
  • Average daylight in September: 12h and 21min

The month with the longest days is June (Average daylight: 14h and 14min).
The month with the shortest days is December (Average daylight: 10h and 4min).

  • Average sunshine in September: 9h and 42min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in September
Jackson, MS

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).

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Average UV index in September
Jackson, MS

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

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

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Average cloud cover in September
Jackson, MS

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).

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Average visibility in September
Jackson, MS

Average visibility in September - Jackson, 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).

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