September weather forecast and climate
Alma, FL

The first month of the autumn, September, is still a tropical month in Alma, Florida, with temperature in the range of an average low of 69.4°F (20.8°C) and an average high of 87.4°F (30.8°C).

Temperature

In Alma, the average high-temperature is almost the same as in August - a still tropical 87.4°F (30.8°C). In September, in Alma, the average low-temperature is 69.4°F (20.8°C).

Heat index

In September, the average heat index is calculated to a torrid 103.1°F (39.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like differences in body mass, height, and shape, clothing, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

July through September and December, with an average relative humidity of 78%, are most humid months in Alma.

Rainfall

In Alma, in September, during 11.1 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Alma, during the entire year, the rain falls for 113.9 days and collects up to 8.98" (228mm) of precipitation.

Snowfall

March through December are months without snowfall in Alma.

Daylight

In Alma, Florida, the average length of the day is 12.3h.

Sunshine

In September, the average sunshine in Alma is 8.5h.

UV index

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 Alma?

The average high-temperature, in September, in Alma, Florida, is 87.4°F (30.8°C), while the average low-temperature is 69.4°F (20.8°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that represents influence of the relative humidity to air temperaure, is estimated at 103.1°F (39.5°C).

What is the most humid month in Alma?

July through September and December, with an average relative humidity of 78%, are most humid months.

What is the average humidity in September in Alma?

The average relative humidity in September in Alma, Florida, is 78%.

How many days does it rain in September in Alma?

In Alma, in September, it is raining for 11.1 days, with typically 0.55" (14mm) of accumulated precipitation.

When it does not snow in Alma?

March through December are months without snowfall in Alma, Florida.

How many hours of daylight does Alma have in September?

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

How long on average sun shines in September in Alma?

In Alma, Florida, the average sunshine in September is 8.5h.

What is the UV index reading in September in Alma?

In Alma, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Alma, FL
  • Average high temperature in September: 87.4°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (60.6°F).

  • Average low temperature in September: 69.4°F

The month with the highest average low temperature is August (73.4°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).

Average pressure in September - Alma, FL
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June, August and September (29.98").

Average wind speed in September - Alma, FL
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in September - Alma, FL
  • Average humidity in September: 78%

Months with the highest relative humidity are July, August, September and December (78%).
The month with the lowest relative humidity is May (72%).

Average rainfall in September - Alma, FL
  • Average rainfall in September: 0.55"

The wettest month (with the highest rainfall) is August (1.42").
The driest month (with the least rainfall) is March (0.35").

Average rainfall days in September - Alma, FL
  • Average rainfall days in September: 11.1 days

The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is November (5 days).

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

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

Average daylight in September / Average sunshine in September - Alma, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is December (Average sunshine: 5.6h).

Average sunshine days in September - Alma, FL
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is August (9.5 days).

Average UV index in September - Alma, FL
  • Average UV index in September: 6

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 3).

Average cloud cover in September - Alma, FL
  • Average cloud cover in September: 35

Months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in September - Alma, FL
  • Average visibility in September: 5mi

Months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
Months with the lowest visibility are July, August and September (5mi).