September weather forecast
Sun Valley, FL

The first month of the autumn, September, is still a warm month in Sun Valley, Florida, with an average temperature ranging between max 85.1°F (29.5°C) and min 80.1°F (26.7°C).

Temperature

Sun Valley observes an average high-temperature of a moderately hot 85.1°F (29.5°C) in September, barely different from 86.7°F (30.4°C) in August. A modest dip in temperatures to an average of 80.1°F (26.7°C) is observed throughout Sun Valley's September nights.

Heat index

September's heat index is evaluated at a very hot 95°F (35°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The average relative humidity in September in Sun Valley is 75%.

Rainfall

In September, in Sun Valley, the rain falls for 26.8 days. Throughout September, 7.48" (190mm) of precipitation is accumulated. Throughout the year, there are 238.3 rainfall days, and 54.53" (1385mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Sun Valley, Florida, is 12h and 18min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

The average sunshine in September in Sun Valley is 8.9h.

UV index

The months with the highest UV index in Sun Valley are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.