July weather forecast
Saint Marks, FL

July in Saint Marks, Florida, is a tropical summer month, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 79.5°F (26.4°C).

Temperature

July and August represent the warmest period, with an average high-temperature of 86.5°F (30.3°C).

Heat index

For most parts of July, the heat index is calculated to be a sweltering 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In July, the average relative humidity is 75%.

Rainfall

In Saint Marks, during July, the rain falls for 24.8 days and regularly aggregates up to 6.3" (160mm) of precipitation. Throughout the year, in Saint Marks, Florida, there are 173 rainfall days, and 43.74" (1111mm) of precipitation is accumulated.

Daylight

In July, the average length of the day in Saint Marks is 13h and 52min.
On the first day of the month, sunrise is at 6:39 am and sunset at 8:42 pm. On the last day of July, sunrise is at 6:55 am and sunset at 8:30 pm EDT.

Sunshine

In Saint Marks, the average sunshine in July is 10.9h.

UV index

The months with the highest UV index in Saint Marks are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 7 during July translates into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Experience reduced UV exposure by about half when donning a wide-brim hat.