September weather forecast
Orlando, FL

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Colorful water reflection of Orlando city in Florida, USA, with its majestic skyscrapers
Colorful water reflection of Orlando city in Florida, USA, with its majestic skyscrapers

Weather in September

The weather in September begins to hint towards the end of summer while the city remains drenched in high warmth, with temperatures ranging between 74.5°F (23.6°C) to 88.5°F (31.4°C). Humidity levels remain high, yet slightly drier than the preceding summer months. The duration of daylight shrinks further to 12.3 hours, indicating the impending fall. An extended ten-day reduction in sunshine compared to August intimates the transition towards the cooler half of the year. The UV index tends to descend back to 7, prompting lesser severity of sun protection.

Temperature

The advent of September reveals an average high-temperature of a still tropical 88.5°F (31.4°C), showing minimal difference from the prior month. Orlando experiences a mean low-temperature of 74.5°F (23.6°C) during September.

Heat index

September's average heat index is computed to be a blisteringly hot 105.8°F (41°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

August and September, with an average relative humidity of 77%, are the most humid months in Orlando.

Rainfall

In Orlando, Florida, during September, the rain falls for 21.4 days and regularly aggregates up to 3.94" (100mm) of precipitation. Throughout the year, there are 187.6 rainfall days, and 33.86" (860mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:04 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:12 pm EDT.

Sunshine

The average sunshine in September in Orlando is 8.7h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

Is it hot in Orlando during September?

In Orlando, 88.5°F (31.4°C) is the average high-temperature and 74.5°F (23.6°C) is the average low-temperature during September. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in September is computed to be 105.8°F (41°C).

What are the most humid months in Orlando?

August and September, with an average relative humidity of 77%, are most humid months in Orlando, Florida.

What is the average humidity in September in Orlando?

In Orlando, the average relative humidity in September is 77%.

How much does it rain in Orlando in September?

In September, in Orlando, the rain falls for 21.4 days. Throughout September, 3.94" (100mm) of precipitation is accumulated.

How many hours of daylight does Orlando have in September?

In Orlando, the average day length in September is 12h and 19min.

When are sunrise and sunset in September in Orlando?

In September, on the first day of the month, sunrise is at 7:04 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:12 pm EDT.

How many hours of sunshine does Orlando have in September?

The average sunshine duration in September in Orlando, Florida, is 8.7h.

What are the months with the highest UV index in Orlando?

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

How high is the UV index in September in Orlando?

The average daily maximum UV index in September in Orlando is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Orlando, FL

Average temperature in September - Orlando, FL
  • Average high temperature in September: 88.5°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in September: 74.5°F

The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (51.6°F).

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Average pressure in September
Orlando, FL

Average pressure in September - Orlando, FL
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

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Average wind speed in September
Orlando, FL

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

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

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Average humidity in September
Orlando, FL

Average humidity in September - Orlando, FL
  • Average humidity in September: 77%

The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in September
Orlando, FL

Average rainfall in September - Orlando, FL
  • Average rainfall in September: 3.94"

The wettest month (with the highest rainfall) is August (5.31").
The driest months (with the least rainfall) are March and December (1.34").

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Average rainfall days in September
Orlando, FL

Average rainfall days in September - Orlando, FL
  • Average rainfall days in September: 21.4 days

The month with the highest number of rainy days is July (24.7 days).
The month with the least rainy days is November (10 days).

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

Average daylight in September / Average sunshine in September - Orlando, FL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

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Average sunshine days in September
Orlando, FL

Average sunshine days in September - Orlando, FL
  • Average sunshine days in September: 6 days

The month with the most sunshine days is March (17.8 days).
The month with the least sunshine days is August (3.9 days).

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Average UV index in September
Orlando, FL

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

The 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
Orlando, FL

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

The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).

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Average visibility in September
Orlando, FL

Average visibility in September - Orlando, FL
  • 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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Orlando, Florida, USA

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