September weather forecast
Sunset Harbor, FL

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Weather in September

The first month of the autumn, September, is still a hot month in Sunset Harbor, Florida, with an average temperature varying between 88.2°F (31.2°C) and 72.7°F (22.6°C).

Temperature

September's arrival brings an average high-temperature of a still tropical 88.2°F (31.2°C), slightly deviating from August's 90.1°F (32.3°C). September in Sunset Harbor sees the temperature falling to a mean low of 72.7°F (22.6°C).

Heat index

September's heat index is appraised at an extremely hot 105.8°F (41°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

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

Rainfall

In Sunset Harbor, during September, the rain falls for 18.5 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Sunset Harbor, Florida, during the entire year, the rain falls for 159.3 days and collects up to 21.1" (536mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

In Sunset Harbor, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:06 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index in Sunset Harbor is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In September, in Sunset Harbor, the average high-temperature is 88.2°F (31.2°C), and the average low-temperature is 72.7°F (22.6°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in September is appraised at 105.8°F (41°C).

What is the most humid month?

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

What is the average humidity in September?

The average relative humidity in September is 78%.

How many days does it rain in September?

In Sunset Harbor, during September, the rain falls for 18.5 days and regularly aggregates up to 1.93" (49mm) of precipitation.

When it does not snow?

February through December are months without snowfall.

What is the average length of the day in September?

The average day length in September is 12h and 19min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:06 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

How long on average sun shines in September?

In Sunset Harbor, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September?

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

Average temperature in September
Sunset Harbor, FL

Average temperature in September - Sunset Harbor, FL
  • Average high temperature in September: 88.2°F

The warmest months (with the highest average high temperature) are July and August (90.1°F).
The month with the lowest average high temperature is January (66.6°F).

  • Average low temperature in September: 72.7°F

The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (48.7°F).

Average pressure in September
Sunset Harbor, FL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

Average wind speed in September
Sunset Harbor, FL

Average wind speed in September - Sunset Harbor, FL
  • Average wind speed in September: 5mph

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).

Average humidity in September
Sunset Harbor, FL

Average humidity in September - Sunset Harbor, FL
  • Average humidity in September: 78%

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

Average rainfall in September
Sunset Harbor, FL

Average rainfall in September - Sunset Harbor, FL
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is July (3.82").
The driest month (with the least rainfall) is March (0.71").

Average rainfall days in September
Sunset Harbor, FL

Average rainfall days in September - Sunset Harbor, FL
  • Average rainfall days in September: 18.5 days

The month with the highest number of rainy days is July (21.9 days).
The month with the least rainy days is November (7 days).

Average snowfall days in September
Sunset Harbor, FL

Average snowfall days in September - Sunset Harbor, FL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in September /
Average sunshine in September
Sunset Harbor, FL

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

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is May (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in September
Sunset Harbor, FL

Average sunshine days in September - Sunset Harbor, FL
  • Average sunshine days in September: 9.8 days

The month with the most sunshine days is January (21.7 days).
The month with the least sunshine days is July (6.3 days).

Average UV index in September
Sunset Harbor, FL

Average UV index in September - Sunset Harbor, FL
  • Average UV index in September: 6

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

Average cloud cover in September
Sunset Harbor, FL

Average cloud cover in September - Sunset Harbor, FL
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 29).

Average visibility in September
Sunset Harbor, FL

Average visibility in September - Sunset Harbor, 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).

Sunset Harbor, Florida, USA

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