July weather forecast
Saint-Marc, Haiti

Weather in July in Saint-Marc remains hot and humid with minor changes in temperature, humidity, and sea temperature compared to June. A notable shift, however, is in rainfall - jumping slightly from 81mm (3.19") to 88mm (3.46"). Despite the increase in rainfall, July experiences the longest hours of sunshine, together with ample daylight. This makes it an ideal month for beach activities.

Temperature

The warmest temperatures occur during July, when averages reach a peak of 30.7°C (87.3°F) and a low of 23.5°C (74.3°F).

Heat index

The heat index value for July is estimated at a sweltering 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. 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 Saint-Marc, the average relative humidity in July is 77%.

Rainfall

In Saint-Marc, Haiti, during July, the rain falls for 22.9 days and regularly aggregates up to 88mm (3.46") of precipitation. In Saint-Marc, during the entire year, the rain falls for 219.6 days and collects up to 736mm (28.98") of precipitation.

Sea temperature

In Saint-Marc, Haiti, in July, the average water temperature is 29.2°C (84.6°F).
Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

In Saint-Marc, the average length of the day in July is 13h and 9min.
On the first day of July, sunrise is at 06:17 and sunset at 19:32. On the last day of the month, sunrise is at 06:27 and sunset at 19:26 EDT.

Sunshine

The months with the most sunshine in Saint-Marc are July and August, with an average of 11.3h of sunshine.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 7 during July translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take caution! The UV rays from the Sun gain strength from sand and water reflections.