September weather forecast
Anastasia, FL

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Weather in September

September, the first month of the autumn in Anastasia, is still a hot month, with an average temperature varying between 75.9°F (24.4°C) and 86°F (30°C).

Temperature

September's arrival registers an average high-temperature of a still tropical 86°F (30°C), closely aligning with the temperature of the previous month. An average nighttime temperature of 75.9°F (24.4°C) is recorded during September.

Heat index

In September, the heat index is calculated to be a sweltering 98.6°F (37°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Anastasia, in September, during 19.8 rainfall days, 4.09" (104mm) of precipitation is typically accumulated. Throughout the year, there are 186.8 rainfall days, and 30.2" (767mm) of precipitation is accumulated.

Snowfall

February through November are months without snowfall.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:11 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 6 in September translates into the following instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. 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. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

In Anastasia, 86°F (30°C) is the average high-temperature and 75.9°F (24.4°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How much does it rain in Anastasia in September?

In September, in Anastasia, the rain falls for 19.8 days. Throughout September, 4.09" (104mm) of precipitation is accumulated.

When it does not snow?

In Anastasia, snow does not fall in February through November.

What is the average length of the day in September?

In Anastasia, the average day length in September is 12h and 20min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm EDT.

How long on average sun shines in September?

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

What is the UV index intensity in September in Anastasia?

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

Average temperature in September - Anastasia, FL
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (64°F).

  • Average low temperature in September: 75.9°F

The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (51.4°F).

Average pressure in September
Anastasia, FL

Average pressure in September - Anastasia, FL
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.98"Hg).

Average wind speed in September
Anastasia, FL

Average wind speed in September - Anastasia, FL
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

Average humidity in September
Anastasia, FL

Average humidity in September - Anastasia, FL
  • Average humidity in September: 76%

The months with the highest relative humidity are July, August and December (77%).
The month with the lowest relative humidity is March (71%).

Average rainfall in September
Anastasia, FL

Average rainfall in September - Anastasia, FL
  • Average rainfall in September: 4.09"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (1.18").

Average rainfall days in September
Anastasia, FL

Average rainfall days in September - Anastasia, FL
  • Average rainfall days in September: 19.8 days

The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is February (10.3 days).

Average snowfall days in September
Anastasia, FL

Average snowfall days in September - Anastasia, FL
  • Average snowfall days in September: 0 days

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

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

Average daylight in September / Average sunshine in September - Anastasia, 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 July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in September
Anastasia, FL

Average sunshine days in September - Anastasia, FL
  • Average sunshine days in September: 6.8 days

The month with the most sunshine days is March (17.9 days).
The month with the least sunshine days is August (4.4 days).

Average UV index in September
Anastasia, FL

Average UV index in September - Anastasia, 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
Anastasia, FL

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

The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 26).

Average visibility in September
Anastasia, FL

Average visibility in September - Anastasia, 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).

Anastasia, Florida, USA

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