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
At the start of September, Relay's average high-temperature reaches a still tropical 88.5°F (31.4°C), subtly different from the preceding month. Relay records an average nighttime low-temperature of 73.8°F (23.2°C) throughout September.Heat index
In September, the heat index is evaluated at a blisteringly hot 105.8°F (41°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. 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 highly critical to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
August and September, with an average relative humidity of 78%, are the most humid months.Rainfall
In Relay, during September, the rain falls for 22.3 days and regularly aggregates up to 4.09" (104mm) of precipitation. In Relay, Florida, during the entire year, the rain falls for 191.3 days and collects up to 34.45" (875mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:46 pm. On the last day of September, in Relay, sunrise is at 7:18 am and sunset at 7:11 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. 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 most humid month?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Relay?
When are sunrise and sunset in September?
How many hours of sunshine does Relay have in September?
What is the UV index reading in September?
Average temperature in September
Relay, FL
- Average high temperature in September: 88.5°F
The warmest month (with the highest average high temperature) is August (91.4°F).
The month with the lowest average high temperature is January (67.1°F).
- Average low temperature in September: 73.8°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).
Average pressure in September
Relay, 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
Relay, FL
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are March and April (5.8mph).
The calmest month (with the lowest average wind speed) is July (4.2mph).
Average humidity in September
Relay, FL
- Average humidity in September: 78%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Relay, FL
- Average rainfall in September: 4.09"
The wettest month (with the highest rainfall) is July (5.28").
The driest months (with the least rainfall) are March and November (1.26").
Average rainfall days in September
Relay, FL
- Average rainfall days in September: 22.3 days
The month with the highest number of rainy days is August (26.3 days).
The month with the least rainy days is November (9.6 days).
Average snowfall days in September
Relay, 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
Relay, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Relay, FL
- Average sunshine days in September: 6.1 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
Relay, 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
Relay, FL
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 29).
Average visibility in September
Relay, 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).
Relay, Florida, USA
Weather forecast for your location
2. Allow the app to use your location