July weather forecast
San Blas, Mexico

July, like June, is another tropical summer month in San Blas, Mexico, with an average temperature fluctuating between 24.1°C (75.4°F) and 33.6°C (92.5°F).

Temperature

July registers an average high-temperature of a still tropical 33.6°C (92.5°F), slightly varied from June's 33.4°C (92.1°F). San Blas, in the month of July, anticipates a consistent average low-temperature of 24.1°C (75.4°F).

Heat index

In July, the heat index is appraised at a burning hot 46°C (114.8°F). Notice: Heat cramps and heat exhaustion are likely. Continued strenuous activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in July is 72%.

Rainfall

In San Blas, during July, the rain falls for 19.5 days and regularly aggregates up to 78mm (3.07") of precipitation. Throughout the year, in San Blas, Mexico, there are 106.3 rainfall days, and 439mm (17.28") of precipitation is accumulated.

Sea temperature

In San Blas, Mexico, in July, the average water temperature is 30°C (86°F).
Note: One might not get the desired cooling sensation in waters that have temperatures higher than 30°C (86°F).

Daylight

In July, the average length of the day in San Blas is 13h and 18min.
On the first day of the month, sunrise is at 5:22 am and sunset at 6:47 pm. On the last day of July, in San Blas, Mexico, sunrise is at 5:34 am and sunset at 6:40 pm MST.

Sunshine

The average sunshine in July in San Blas is 10.9h.

UV index

The months with the highest UV index in San Blas are May through July, September and October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 7 in July translates into these instructions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Attention! The reflection of both water and sand can increase the intensity of UV rays.