Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's presence marks an average high-temperature of a still hot 87.3°F (30.7°C), subtly varied from August's 90.3°F (32.4°C). Throughout September nights, Altha experiences a consistent temperature average of 70.2°F (21.2°C).Heat index
September's mean heat index is computed to be a very hot 102.2°F (39°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.In terms of the heat index, values are set with light wind and shade conditions in mind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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 heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
September and December, with an average relative humidity of 78%, are the most humid months in Altha.Rainfall
In Altha, during September, the rain falls for 14.3 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 140 rainfall days, and 19.8" (503mm) of precipitation is accumulated.Snowfall
April through December are months without snowfall.Daylight
In Altha, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:17 am and sunset at 7:03 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 6:26 pm CDT.
Sunshine
In Altha, Florida, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Altha is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What are the most humid months?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Altha have in September?
What is the UV index intensity in September?
Average temperature in September
Altha, FL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Altha, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Altha, FL
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is March (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Altha, FL
- Average humidity in September: 78%
The months with the highest relative humidity are September and December (78%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Altha, FL
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Altha, FL
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is November (5 days).
Average snowfall days in September
Altha, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January, February and March (0.1 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Altha, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Altha, FL
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (23.6 days).
The month with the least sunshine days is July (7.6 days).
Average UV index in September
Altha, 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 3).
Average cloud cover in September
Altha, FL
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 44).
The months with the least cloud cover are May and October (Cloud cover 28).
Average visibility in September
Altha, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February and December (5mi).
Altha, Florida, USA
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