September weather forecast
Fisher Island, FL

The first month of the autumn, September, is also a moderately hot month in Fisher Island, Florida, with an average temperature ranging between max 85.6°F (29.8°C) and min 81°F (27.2°C).

Temperature

September ushers in an average high-temperature of a moderately hot 85.6°F (29.8°C), aligning closely with the preceding month. Fisher Island experiences an average nighttime temperature of 81°F (27.2°C) in September, reflecting a minor difference from the day's peak.

Heat index

For most parts of September, the heat index is appraised at a torrid 95°F (35°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Consider that heat index readings are for situations in the shade and light wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In Fisher Island, Florida, the average relative humidity in September is 73%.

Rainfall

In Fisher Island, in September, it is raining for 24.5 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 182.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Fisher Island is 12h and 17min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

In Fisher Island, the average sunshine in September is 9.1h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index in Fisher Island, Florida. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 in September translates into these instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.