September weather forecast and climate
Alva, FL

The first month of the autumn, September, is also a hot month in Alva, Florida, with average temperature varying between 88.3°F (31.3°C) and 74.3°F (23.5°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 88.3°F (31.3°C). In September, in Alva, the average low-temperature is 74.3°F (23.5°C).

Heat index

In September, the average heat index is evaluated at a blistering 107.4°F (41.9°C). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, differences in body mass, height, and shape, pregnancy), and activity. 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 are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

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

Daylight

In September, the average length of the day in Alva is 12.3h.

Sunshine

The average sunshine in Alva is 8.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Alva, Florida. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Alva?

In Alva, Florida, in September, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 74.3°F (23.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines air temperature and relative humidity, in September is estimated at 107.4°F (41.9°C).

What is the most humid month in Alva?

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

What is the average humidity in September in Alva?

The average relative humidity in September in Alva is 80%.

How many days does it rain in September in Alva?

In Alva, in September, it is raining for 19.7 days, with typically 1.81" (46mm) of accumulated precipitation.

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

The average length of the day in September in Alva is 12.3h.

How long on average sun shines in September in Alva?

The average sunshine in September in Alva, Florida, is 8.8h.

When is the highest UV index in Alva?

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

How high is the UV index in September in Alva?

The average daily maximum UV index in September in Alva is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.
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: 29.95"

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

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: 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: 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: 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: 12.3h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in September: 8.8h

Months with the most sunshine are May and July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 6.3h).

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: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
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: 33

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

Average visibility in September - Alva, FL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).