September weather forecastIndian River Shores, FL
September
Weather in September
September, the first month of the autumn in Indian River Shores, is also a moderately hot month, with an average temperature ranging between min 77.4°F (25.2°C) and max 85.5°F (29.7°C).Temperature
Indian River Shores experiences a transition to a warm 85.5°F (29.7°C) in average high-temperatures with the arrival of September, not greatly differing from August's 87.4°F (30.8°C). Consistently, Indian River Shores reports average nighttime temperatures of 77.4°F (25.2°C) during September, a marginal step down from its daytime highs.Heat index
The average heat index in September is evaluated at a very hot 96.8°F (36°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.Heat index's context suggests values are appropriate for shady areas and slight breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In September, the average relative humidity in Indian River Shores is 78%.Rainfall
In Indian River Shores, in September, during 19.6 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 153.2 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Ocean temperature
In Indian River Shores, the average seawater temperature in September is 84°F (28.9°C).Note: Water activities including swimming and diving at temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.
Daylight
The average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:08 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the UV index of 7 transforms into the following advice:
Fend off overexposure. Sun protection is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Indian River Shores, FL
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (70.2°F).
- Average low temperature in September: 77.4°F
The month with the highest average low temperature is August (78.6°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).
Average pressure in September
Indian River Shores, FL
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in September
Indian River Shores, FL
- Average wind speed in September: 7.8mph
The windiest months (with the highest average wind speed) are January and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Indian River Shores, FL
- Average humidity in September: 78%
The months with the highest relative humidity are June, July and August (79%).
The month with the lowest relative humidity is March (72%).
Average rainfall in September
Indian River Shores, FL
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in September
Indian River Shores, FL
- Average rainfall days in September: 19.6 days
The month with the highest number of rainy days is August (20.2 days).
The month with the least rainy days is February (7.7 days).
Average sea temperature in September
Indian River Shores, FL
- Average sea temperature in September: 84.1°F
The best month for swimming (with the highest average sea temperature) is August (84.8°F).
The coldest months (with the lowest average sea temperature) are January and February (72.3°F).
Average daylight in September /
Average sunshine in September
Indian River Shores, FL
- Average daylight in September: 12h and 18min
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 0min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).
Average sunshine days in September
Indian River Shores, FL
- Average sunshine days in September: 6.3 days
The month with the most sunshine days is March (19.5 days).
The month with the least sunshine days is August (5.1 days).
Average UV index in September
Indian River Shores, 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 months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in September
Indian River Shores, FL
- Average cloud cover in September: 30
The month with the most cloud cover is November (Cloud cover 36).
The months with the least cloud cover are May and August (Cloud cover 27).
Average visibility in September
Indian River Shores, 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).
