September weather forecast
Kissimmee, FL

Weather in September

September, the first month of the autumn, in Kissimmee, is also a hot month, with average temperature fluctuating between 88.3°F (31.3°C) and 74.3°F (23.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still hot 88.3°F (31.3°C). In September, the average low-temperature is 74.3°F (23.5°C).

Heat index

The average heat index is calculated to be a blistering 106.2°F (41.2°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, 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. 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, as evaporated sweat carries heat away from the body. 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

July through September, with an average relative humidity of 78%, are most humid months in Kissimmee.

Rainfall

In Kissimmee, in September, it is raining for 20.2 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 176.9 rainfall days, and 23.62" (600mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12.3h.

Sunshine

The average sunshine in September is 8.7h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Kissimmee?

The average high-temperature, in September, in Kissimmee, is 88.3°F (31.3°C), while the average low-temperature is 74.3°F (23.5°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in September is calculated to be 106.2°F (41.2°C).

What are the most humid months in Kissimmee?

Months with the highest humidity are July through September, with an average relative humidity of 78%.

What is the average humidity in September in Kissimmee?

The average relative humidity in September in Kissimmee, Florida, is 78%.

How much does it rain in Kissimmee in September?

In Kissimmee, in September, during 20.2 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

How many hours of daylight does Kissimmee have in September?

The average length of the day in September in Kissimmee, Florida, is 12.3h.

How long on average sun shines in September in Kissimmee?

The average sunshine in September in Kissimmee, Florida, is 8.7h.

What is the month with the highest UV index in Kissimmee?

May through September, with an average maximum UV index of 7, are months with the highest UV index in Kissimmee, Florida.

How high is the UV index in September in Kissimmee?

In September, the average daily maximum UV index in Kissimmee is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Kissimmee, FL

Average temperature in September - Kissimmee, FL
  • Average high temperature in September: 88.3°F

The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is January (68.7°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (51.6°F).

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Average pressure in September
Kissimmee, FL

Average pressure in September - Kissimmee, FL
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.96").

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Average wind speed in September
Kissimmee, FL

Average wind speed in September - Kissimmee, FL
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are January, March and April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

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Average humidity in September
Kissimmee, FL

Average humidity in September - Kissimmee, FL
  • Average humidity in September: 78%

Months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).

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Average rainfall in September
Kissimmee, FL

Average rainfall in September - Kissimmee, FL
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is August (4.02").
The driest month (with the least rainfall) is March (0.67").

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Average rainfall days in September
Kissimmee, FL

Average rainfall days in September - Kissimmee, FL
  • Average rainfall days in September: 20.2 days

The month with the highest number of rainy days is August (24.7 days).
The month with the least rainy days is January (8.3 days).

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Average daylight in September /
Average sunshine in September
Kissimmee, FL

Average daylight in September / Average sunshine in September - Kissimmee, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in September: 8.7h

Months with the most sunshine are May and July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 6.2h).

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Average sunshine days in September
Kissimmee, FL

Average sunshine days in September - Kissimmee, FL
  • Average sunshine days in September: 7.5 days

The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is August (3.9 days).

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Average UV index in September
Kissimmee, FL

Average UV index in September - Kissimmee, FL
  • Average UV index in September: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

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Average cloud cover in September
Kissimmee, FL

Average cloud cover in September - Kissimmee, FL
  • Average cloud cover in September: 32

Months with the most cloud cover are February and December (Cloud cover 36).
Months with the least cloud cover are May and October (Cloud cover 29).

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Average visibility in September
Kissimmee, FL

Average visibility in September - Kissimmee, FL
  • 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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