September weather forecast
Delray Beach, FL

September retains some of Delray Beach, Florida's summer heat but marks the beginning of a decline. The rainfall inches down from its August peak to a slightly lower 6.93in, ushering in more agreeable weather patterns. Despite the temperature shift, the sea remains warm encouraging tourist activities. Even though October looms with cooler forecasts, September manages to uphold the summer remnants.

Temperature

September brings a marginal elevation to a moderately hot 85.1°F (29.5°C) from August's 86.9°F (30.5°C) in Delray Beach's average high-temperatures. Maintaining close parity with daytime warmth, the average nocturnal temperature during September stays at 80.1°F (26.7°C).

Heat index

The heat index for September is computed to be a sweltering 95°F (35°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

June, September and December, with an average relative humidity of 75%, are the most humid months.

Rainfall

In Delray Beach, during September, the rain falls for 26.5 days and regularly aggregates up to 6.93" (176mm) of precipitation. In Delray Beach, during the entire year, the rain falls for 229 days and collects up to 46.46" (1180mm) of precipitation.

Ocean temperature

In September, the average ocean temperature is 85.1°F (29.5°C).
Note: For any water activity, having surface water temperatures from 77°F (25°C) to 84.2°F (29°C) is considered outstanding and highly delightful for lengthened periods.

Daylight

The average length of the day in September is 12h and 18min.
On the first day of September in Delray Beach, sunrise is at 7:00 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 September, the average sunshine in Delray Beach is 8.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Delray Beach. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! Reflections from sand and water can intensify the Sun's UV radiation.