July weather forecast
Saint Marks, FL

July is a tropical summer month in Saint Marks, Florida, with an average temperature ranging between max 86.5°F (30.3°C) and min 79.5°F (26.4°C).

Temperature

During July and August, Saint Marks experiences its warmest period, with an average high-temperature of 86.5°F (30.3°C).

Heat index

For July, the heat index is appraised at a very hot 98.6°F (37°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In July, the average relative humidity in Saint Marks is 75%.

Rainfall

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

Daylight

In Saint Marks, the average length of the day in July is 13h and 52min.
On the first day of July, sunrise is at 6:39 am and sunset at 8:42 pm. On the last day of the month, 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 are May through August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In July, the maximum UV index of 7 transforms into these recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.