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
The commencement of September records an average high-temperature of a still tropical 86.5°F (30.3°C), barely varying from August's 88°F (31.1°C). Crystal Beach maintains a minor drop in temperature during September nights, with averages of 77.7°F (25.4°C).Heat index
The heat index value during September is appraised at a sweltering 98.6°F (37°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.Know that the heat index computations account for shaded terrains and slight winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical 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.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
In Crystal Beach, the average relative humidity in September is 74%.Rainfall
In Crystal Beach, in September, it is raining for 21 days, with typically 3.7" (94mm) of accumulated precipitation. Throughout the year, there are 168.5 rainfall days, and 27.4" (696mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Crystal Beach is 12h and 19min.On the first day of September, sunrise is at 7:09 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.
Sunshine
In Crystal Beach, the average sunshine in September is 9.2h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 7 in September suggests the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. 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 Crystal Beach have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Crystal Beach have in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Crystal Beach, FL
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (65.7°F).
- Average low temperature in September: 77.7°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (55°F).
Average pressure in September
Crystal Beach, FL
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in September
Crystal Beach, FL
- Average wind speed in September: 7.6mph
The windiest months (with the highest average wind speed) are January and March (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in September
Crystal Beach, FL
- Average humidity in September: 74%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are May and October (72%).
Average rainfall in September
Crystal Beach, FL
- Average rainfall in September: 3.7"
The wettest month (with the highest rainfall) is August (5.16").
The driest month (with the least rainfall) is March (0.79").
Average rainfall days in September
Crystal Beach, FL
- Average rainfall days in September: 21 days
The month with the highest number of rainy days is July (25.6 days).
The month with the least rainy days is November (7.6 days).
Average daylight in September /
Average sunshine in September
Crystal Beach, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is May (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Crystal Beach, FL
- Average sunshine days in September: 6.2 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (3.6 days).
Average UV index in September
Crystal Beach, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in September
Crystal Beach, FL
- Average cloud cover in September: 27
The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 20).
Average visibility in September
Crystal Beach, 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).
Crystal Beach, Florida, USA
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