September weather forecast and climate
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 average temperature ranging between max 87.3°F (30.7°C) and min 67.5°F (19.7°C).

Temperature

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

Heat index

The average heat index is estimated at a very hot 99.9°F (37.7°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, wind, 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 particularly important for children. 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.
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. 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

The average relative humidity in September is 73%.

Rainfall

In Jackson, during 11.9 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Jackson, Mississippi, 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 Jackson, the average length of the day is 12.4h.

Sunshine

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

UV index

In September, the average daily maximum UV index in Jackson is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Jackson?

In September, in Jackson, Mississippi, 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. 'feels like', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, in September is estimated at 99.9°F (37.7°C).

What is the average humidity in September in Jackson?

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

How many days does it rain in September in Jackson?

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, Mississippi.

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

In Jackson, Mississippi, the average length of the day in September is 12.4h.

How long on average sun shines in September in Jackson?

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

How high is the UV index in September in Jackson?

In September, the average daily maximum UV index in Jackson is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.

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"

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

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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%

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").
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).
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: 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).

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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

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).

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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

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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