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 still a tropical month in Jackson, Mississippi, with an average temperature varying between 67.5°F (19.7°C) and 87.3°F (30.7°C).

Temperature

In Jackson, the average high-temperature in September is relatively 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

The average heat index in September is calculated to be a very hot 100.4°F (38°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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like clothing, wind, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 is 73%.

Rainfall

In Jackson, during September, the rain falls for 11.9 days and regularly aggregates up to 1.89" (48mm) of precipitation. 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.

Daylight

In September, the average length of the day 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 reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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). in September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is calculated 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, during September, the rain falls for 11.9 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow in Jackson?

March through December are months without snowfall in Jackson.

What is the average length of the day in September in Jackson?

In September, the average day length in Jackson, Mississippi, is 12h and 21min.

When are sunrise and sunset in September in Jackson?

On the first day of September in Jackson, Mississippi, 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?

The average sunshine duration in September in Jackson, Mississippi, is 9.7h.

What is the UV index intensity in September in Jackson?

In Jackson, Mississippi, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents 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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