September weather forecast
Atlantis, FL

Share

Weather in September

September, the first month of the autumn in Atlantis, is also a moderately hot month, with an average temperature fluctuating between 80.1°F (26.7°C) and 85.1°F (29.5°C).

Temperature

The commencement of September introduces an average high-temperature of a warm 85.1°F (29.5°C), closely mirroring the preceding month. September notes an average low temperature of 80.1°F (26.7°C), subtly down from the daytime highs.

Heat index

In September, the average heat index is calculated to be a torrid 95°F (35°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. 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 crucial for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In September, in Atlantis, Florida, the rain falls for 26.8 days. Throughout September, 7.48" (190mm) of precipitation is accumulated. In Atlantis, Florida, during the entire year, the rain falls for 238.3 days and collects up to 54.53" (1385mm) of precipitation.

Daylight

In Atlantis, the average length of the day in September is 12h and 18min.
On the first day of September in Atlantis, sunrise is at 7:00 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

In September, the average sunshine in Atlantis is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Feb 10, 2024 | Published by: Weather U.S. | About Us

Frequently asked questions

How hot is September in Atlantis?

The high-temperature in Atlantis, Florida, during September is 85.1°F (29.5°C) and the low-temperature is 80.1°F (26.7°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 95°F (35°C).

What is the average humidity in September in Atlantis?

In Atlantis, the average relative humidity in September is 75%.

How many days does it rain in September in Atlantis?

In Atlantis, in September, during 26.8 rainfall days, 7.48" (190mm) of precipitation is typically accumulated.

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

In Atlantis, the average day length in September is 12h and 18min.

When is the sunrise / sunset in September in Atlantis?

On the first day of September in Atlantis, sunrise is at 7:00 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

How many hours of sunshine does Atlantis have in September?

In Atlantis, the average sunshine duration in September is 8.9h.

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

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

What is the UV index intensity in September in Atlantis?

In Atlantis, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in September
Atlantis, FL

Average temperature in September - Atlantis, FL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is January (72.5°F).

  • Average low temperature in September: 80.1°F

The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is January (64°F).

Average pressure in September
Atlantis, FL

Average pressure in September - Atlantis, FL
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).

Average wind speed in September
Atlantis, FL

Average wind speed in September - Atlantis, FL
  • Average wind speed in September: 8.5mph

The windiest month (with the highest average wind speed) is March (11.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

Average humidity in September
Atlantis, FL

Average humidity in September - Atlantis, FL
  • Average humidity in September: 75%

The months with the highest relative humidity are June and December (76%).
The month with the lowest relative humidity is March (70%).

Average rainfall in September
Atlantis, FL

Average rainfall in September - Atlantis, FL
  • Average rainfall in September: 7.48"

The wettest month (with the highest rainfall) is August (9.06").
The driest month (with the least rainfall) is January (1.3").

Average rainfall days in September
Atlantis, FL

Average rainfall days in September - Atlantis, FL
  • Average rainfall days in September: 26.8 days

The month with the highest number of rainy days is August (27.3 days).
The month with the least rainy days is February (13.3 days).

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

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

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in September: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 6h and 0min).

Average sunshine days in September
Atlantis, FL

Average sunshine days in September - Atlantis, FL
  • Average sunshine days in September: 2.8 days

The month with the most sunshine days is March (12.7 days).
The month with the least sunshine days is July (2.3 days).

Average UV index in September
Atlantis, FL

Average UV index in September - Atlantis, 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 5).

Average cloud cover in September
Atlantis, FL

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

The months with the most cloud cover are January, October, November and December (Cloud cover 36).
The months with the least cloud cover are April and July (Cloud cover 29).

Average visibility in September
Atlantis, FL

Average visibility in September - Atlantis, 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).

Atlantis, Florida, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location