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
With September's advent, Saint Francis sees an average high-temperature of a still tropical 88°F (31.1°C), subtly shifted from August's 91°F (32.8°C). During the month of September, the temperature falls to an average of 74.1°F (23.4°C).Heat index
The average heat index in September is computed to be a blisteringly hot 104°F (40°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
June through September and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Saint Francis, in September, during 21.8 rainfall days, 4.25" (108mm) of precipitation is typically accumulated. Throughout the year, there are 192.8 rainfall days, and 35.31" (897mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 19min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:12 pm EDT.
Sunshine
In Saint Francis, the average sunshine in September is 8.8h.UV index
In Saint Francis, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. 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. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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 in Saint Francis?
How many hours of daylight does Saint Francis have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Saint Francis?
What is the UV index intensity in September?
Average temperature in September
Saint Francis, FL
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (67.5°F).
- Average low temperature in September: 74.1°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 (51.3°F).
Average pressure in September
Saint Francis, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Saint Francis, FL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in September
Saint Francis, FL
- Average humidity in September: 77%
The months with the highest relative humidity are June, July, August, September and December (77%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Saint Francis, FL
- Average rainfall in September: 4.25"
The wettest month (with the highest rainfall) is August (5.47").
The driest month (with the least rainfall) is March (1.26").
Average rainfall days in September
Saint Francis, FL
- Average rainfall days in September: 21.8 days
The month with the highest number of rainy days is August (26.1 days).
The month with the least rainy days is January (9.9 days).
Average snowfall days in September
Saint Francis, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Saint Francis, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Saint Francis, FL
- Average sunshine days in September: 5.5 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (3 days).
Average UV index in September
Saint Francis, 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 4).
Average cloud cover in September
Saint Francis, FL
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in September
Saint Francis, 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).
Saint Francis, Florida, USA
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