September weather forecast
Dunedin, FL

September, the first month of the autumn in Dunedin, is still a tropical month, with an average temperature varying between 77.7°F (25.4°C) and 86.5°F (30.3°C).

Temperature

As August transitions into September, the average high-temperature rests at a still hot 86.5°F (30.3°C), maintaining a close resemblance to the previous month. Dunedin's average nighttime temperature in September modestly descends to a moderately hot 77.7°F (25.4°C).

Heat index

Throughout September, the heat index is evaluated at a very hot 98.6°F (37°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. 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 crucial for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Dunedin, Florida, in September, it is raining for 21 days, with typically 3.7" (94mm) of accumulated precipitation. In Dunedin, during the entire year, the rain falls for 168.5 days and collects up to 27.4" (696mm) of precipitation.

Ocean temperature

In September, the average ocean temperature in Dunedin is 84.6°F (29.2°C).
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

The average length of the day in September in Dunedin is 12h and 19min.
On the first day of September, sunrise is at 7:10 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

The average sunshine in September in Dunedin, Florida, is 9.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Dunedin. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.