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 to 88.5°F. 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

Orlando's shift into September is marked by a subtle change to a still hot 88.5°F from August's 91°F in temperature. An average minimum temperature of 74.5°F marks the month of September in Orlando.

Heat index

The heat index in September is calculated to be a scorching 105.8°F. More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical 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.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

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

Rainfall

In September, the rain falls for 21.4 days. Throughout September, 3.94" of precipitation is accumulated. In Orlando, during the entire year, the rain falls for 187.6 days and collects up to 33.86" of precipitation.

Daylight

The average length of the day in September in Orlando, Florida, is 12h and 19min.
On the first day of the month, sunrise is at 7:03 am and sunset at 7:47 pm. On the last day of September, in Orlando, sunrise is at 7:17 am and sunset at 7:13 pm EDT.

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 in Orlando, Florida. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 7 during September leads to these instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
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FAQ

How hot is it in Orlando in September?

In Orlando, in September, the average high-temperature is 88.5°F, and the average low-temperature is 74.5°F. 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 calculated to be 105.8°F.

What is the most humid month in Orlando?

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

What is the average humidity in September in Orlando?

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

How much does it rain in Orlando in September?

In Orlando, during September, the rain falls for 21.4 days and regularly aggregates up to 3.94" of precipitation.

How many hours of daylight does Orlando have in September?

In Orlando, Florida, 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 7:03 am and sunset at 7:47 pm. On the last day of the month, in Orlando, Florida, sunrise is at 7:17 am and sunset at 7:13 pm EDT.

How long on average sun shines in September in Orlando?

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

What is the month 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 reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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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