September weather forecast
Diamondhead, MS

A transition towards cooler temperatures characterizes September in Diamondhead. Unlike August, the reduction in maximum temperature to 86°F (30°C) is easily felt, hinting at the onset of fall. The retention of 12.3 daylight hours also differentiates this month from its antecedent. Centrally, the wind patterns observe a slight increase to 6.5mph (10.5km/h) that helps moderate the lingering summer heat. Although precipitation reduces to lesser than one inch, the high relative humidity of 75% maintains the moisture levels in September.

Temperature

September commences with an average high-temperature of a still tropical 86°F (30°C), showing little deviation from August's 89.2°F (31.8°C). September is noted for a mean low-temperature of 74.3°F (23.5°C).

Heat index

For most parts of September, the heat index is appraised at a sweltering 96.8°F (36°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. 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 largely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Diamondhead, the average relative humidity in September is 75%.

Rainfall

In Diamondhead, in September, it is raining for 15.4 days, with typically 0.83" (21mm) of accumulated precipitation. In Diamondhead, during the entire year, the rain falls for 131.5 days and collects up to 12.01" (305mm) of precipitation.

Snowfall

In Diamondhead, snow does not fall in February through December.

Daylight

In Diamondhead, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:34 am and sunset at 7:19 pm. On the last day of September, in Diamondhead, sunrise is at 6:50 am and sunset at 6:43 pm CDT.

Sunshine

The average sunshine in September is 10.1h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 6 in September leads to these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.