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 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 observes an average high-temperature of a still tropical 87.3°F (30.7°C), marking an insignificant difference from August's 90.3°F (32.4°C). The average low-temperature of 72.5°F (22.5°C) is witnessed during September.Heat index
The heat index for September is calculated to be a torrid 100.4°F (38°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
In Sumatra, the average relative humidity in September is 75%.Rainfall
In Sumatra, in September, it is raining for 17.5 days, with typically 2.44" (62mm) of accumulated precipitation. In Sumatra, during the entire year, the rain falls for 164.7 days and collects up to 30.63" (778mm) of precipitation.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:17 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:26 pm EDT.
Sunshine
In Sumatra, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Shield from overexposure. Defense against sun-related harm is required. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Sumatra have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Sumatra have in September?
What is the UV index reading in September?
Average temperature in September
Sumatra, FL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is January (60.8°F).
- Average low temperature in September: 72.5°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (45.3°F).
Average pressure in September
Sumatra, 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
Sumatra, FL
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and March (7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Sumatra, FL
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January, May and October (72%).
Average rainfall in September
Sumatra, FL
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in September
Sumatra, FL
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (7.5 days).
Average daylight in September /
Average sunshine in September
Sumatra, 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: 9h and 0min
The months with the most sunshine are May, June and July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Sumatra, FL
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is August (5.2 days).
Average UV index in September
Sumatra, 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
Sumatra, FL
- Average cloud cover in September: 26
The months with the most cloud cover are February and December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 23).
Average visibility in September
Sumatra, 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).
Sumatra, Florida, USA
Weather forecast for your location
2. Allow the app to use your location