September weather forecast
Alva, FL

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Weather in September

The first month of the autumn, September, is still a tropical month in Alva, Florida, with an average temperature ranging between min 74.3°F (23.5°C) and max 88.3°F (31.3°C).

Temperature

Alva records an average high-temperature of a still tropical 88.3°F (31.3°C) as September arrives, nearly mirroring the previous month's climate. The average temperature drops to a moderately hot 74.3°F (23.5°C) during the night in the month of September.

Heat index

The heat index for September is computed to be a scorching 107.6°F (42°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

With an average relative humidity of 80%, September is the most humid month in Alva.

Rainfall

In Alva, in September, during 19.7 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Alva, during the entire year, the rain falls for 161.1 days and collects up to 17.6" (447mm) of precipitation.

Daylight

The average length of the day in September is 12h and 18min.
On the first day of the month, sunrise is at 7:06 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:13 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

September temperatures vary between a high-temperature of 88.3°F (31.3°C) and a low-temperature of 74.3°F (23.5°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 107.6°F (42°C).

What is the most humid month?

The most humid month is September, with an average relative humidity of 80%.

What is the average humidity in September?

In September, the average relative humidity is 80%.

How many days does it rain in September in Alva?

In Alva, during September, the rain falls for 19.7 days and regularly aggregates up to 1.81" (46mm) of precipitation.

How many hours of daylight does Alva have in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 7:06 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:13 pm EDT.

How many hours of sunshine does Alva have in September?

The average sunshine duration in September is 8.8h.

When is the highest UV index?

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

What is the UV index reading in September?

The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Alva, FL

Average temperature in September - Alva, FL
  • Average high temperature in September: 88.3°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 (72.3°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (54.3°F).

Average pressure in September
Alva, FL

Average pressure in September - Alva, FL
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

Average wind speed in September
Alva, FL

Average wind speed in September - Alva, FL
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.4mph).

Average humidity in September
Alva, FL

Average humidity in September - Alva, FL
  • Average humidity in September: 80%

The month with the highest relative humidity is September (80%).
The month with the lowest relative humidity is March (70%).

Average rainfall in September
Alva, FL

Average rainfall in September - Alva, FL
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is March (0.43").

Average rainfall days in September
Alva, FL

Average rainfall days in September - Alva, FL
  • Average rainfall days in September: 19.7 days

The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is January (6.3 days).

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

Average daylight in September / Average sunshine in September - Alva, 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 May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

Average sunshine days in September
Alva, FL

Average sunshine days in September - Alva, FL
  • Average sunshine days in September: 7.7 days

The month with the most sunshine days is January (23 days).
The month with the least sunshine days is August (5.8 days).

Average UV index in September
Alva, FL

Average UV index in September - Alva, 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 months with the lowest UV index are January, February and December (UV index 5).

Average cloud cover in September
Alva, FL

Average cloud cover in September - Alva, FL
  • Average cloud cover in September: 33

The months with the most cloud cover are January, September and December (Cloud cover 33).
The months with the least cloud cover are April and May (Cloud cover 28).

Average visibility in September
Alva, FL

Average visibility in September - Alva, 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).

Alva, Florida, USA

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