July weather forecast
Bay Saint Louis, MS

Bay Saint Louis, Mississippi, bathes in peak summer heat during July. The city experiences high temperatures along with maximum days of rainfall, a drastic difference from the cooler, dry June. July is the year's most humid month, helping maintain the lush green landscapes the city is known for. Despite the high rainfall days of 17.3, there's plenty of sunshine to be enjoyed. Leaving all other months behind, July boasts the highest sea temperature of 86.2°F (30.1°C).

Temperature

July's advent notes a subtle adjustment in average high-temperature to a still hot 89.1°F (31.7°C) from June. The average temperature drops to a moderately hot 77.5°F (25.3°C) during the night in the month of July.

Heat index

During July, the heat index is calculated to be a blistering 105.8°F (41°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In July, the average relative humidity is 75%.

Rainfall

In Bay Saint Louis, during July, the rain falls for 17.3 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Bay Saint Louis, during the entire year, the rain falls for 131.5 days and collects up to 12.01" (305mm) of precipitation.

Snowfall

February through December are months without snowfall.

Ocean temperature

In Bay Saint Louis, in July, the average water temperature is 86.2°F (30.1°C).
Note: When water's temperature exceeds 86°F (30°C), it arguably loses its primary appeal of offering a cool escape.

Daylight

The average length of the day in July is 13h and 53min.
On the first day of July, sunrise is at 5:59 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:51 pm CDT.

Sunshine

The average sunshine in July is 10.8h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 7 during July morphs into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.