July weather forecast
Port Saint John, FL

July, the same as June, in Port Saint John, Florida, is another hot summer month, with temperature in the range of an average low of 76.8°F (24.9°C) and an average high of 88.3°F (31.3°C).

Temperature

In Port Saint John, the average high-temperature in July is almost the same as in June - a still hot 88.3°F (31.3°C). In Port Saint John, in July, the average low-temperature is 76.8°F (24.9°C).

Heat index

In July, the average heat index is appraised at an extremely hot 105.8°F (41°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, differences in body mass, height, and shape, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Port Saint John, the average relative humidity in July is 78%.

Rainfall

In Port Saint John, during July, the rain falls for 25.8 days and regularly aggregates up to 5.59" (142mm) of precipitation. Throughout the year, in Port Saint John, Florida, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.

Daylight

In July, the average length of the day is 13h and 45min.
On the first day of the month, sunrise is at 6:29 am and sunset at 8:24 pm. On the last day of July, sunrise is at 6:44 am and sunset at 8:14 pm EDT.

Sunshine

With an average of 11h of sunshine, July has the most sunshine of the year in Port Saint John.

UV index

The months with the highest UV index in Port Saint John, Florida, are May through September, with an average maximum UV index of 7. 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: The daily maximum UV index of 7 in July interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.