September weather forecast
Anna Maria, FL

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Weather in September

September, the first month of the autumn in Anna Maria, is still a tropical month, with temperature in the range of an average high of 86.2°F (30.1°C) and an average low of 77.9°F (25.5°C).

Temperature

As September takes hold, the average high-temperature is a still hot 86.2°F (30.1°C), nearly mirroring that of the previous month. Anna Maria, during September nights, records a temperature marginally cooler than the daytime average, at a moderately hot 77.9°F (25.5°C).

Heat index

In September, the heat index is evaluated at a very hot 98.6°F (37°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Anna Maria, in September, during 21.5 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. Throughout the year, there are 166.4 rainfall days, and 26.38" (670mm) of precipitation is accumulated.

Ocean temperature

In Anna Maria, the average seawater temperature in September is 84.7°F (29.3°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

In Anna Maria, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a regular UV index of 7 translates into these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be on guard! The reflective nature of sand and water boosts UV exposure.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September in Anna Maria?

The average high-temperature and low-temperature during September are 86.2°F (30.1°C) and 77.9°F (25.5°C) respectively. In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 98.6°F (37°C).

What is the average humidity in September in Anna Maria?

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

How much does it rain in September?

In Anna Maria, in September, during 21.5 rainfall days, 3.43" (87mm) of precipitation is typically accumulated.

What is the water temperature in September?

In Anna Maria, the average seawater temperature in September is 84.7°F (29.3°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Anna Maria?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.1h.

What are the months with the highest UV index?

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

What is the UV index reading in September?

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

Average temperature in September
Anna Maria, FL

Average temperature in September - Anna Maria, FL
  • Average high temperature in September: 86.2°F

The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (66.9°F).

  • Average low temperature in September: 77.9°F

The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (56.8°F).

Average pressure in September
Anna Maria, FL

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

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

Average wind speed in September
Anna Maria, FL

Average wind speed in September - Anna Maria, FL
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

Average humidity in September
Anna Maria, FL

Average humidity in September - Anna Maria, FL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Anna Maria, FL

Average rainfall in September - Anna Maria, FL
  • Average rainfall in September: 3.43"

The wettest month (with the highest rainfall) is July (4.88").
The driest month (with the least rainfall) is November (0.71").

Average rainfall days in September
Anna Maria, FL

Average rainfall days in September - Anna Maria, FL
  • Average rainfall days in September: 21.5 days

The months with the highest number of rainy days are July and August (24.6 days).
The month with the least rainy days is January (7.3 days).

Average sea temperature in September
Anna Maria, FL

Average sea temperature in September - Anna Maria, FL
  • Average sea temperature in September: 84.7°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64°F).

Average daylight in September /
Average sunshine in September
Anna Maria, FL

Average daylight in September / Average sunshine in September - Anna Maria, 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: 9h and 1min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

Average sunshine days in September
Anna Maria, FL

Average sunshine days in September - Anna Maria, FL
  • Average sunshine days in September: 6 days

The month with the most sunshine days is January (22.6 days).
The months with the least sunshine days are July and August (4.8 days).

Average UV index in September
Anna Maria, FL

Average UV index in September - Anna Maria, 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).

Average cloud cover in September
Anna Maria, FL

Average cloud cover in September - Anna Maria, FL
  • Average cloud cover in September: 27

The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 21).

Average visibility in September
Anna Maria, FL

Average visibility in September - Anna Maria, 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).

Anna Maria, Florida, USA

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