July weather forecast
John, French Guiana

July is a hot summer month in John, French Guiana, with an average temperature fluctuating between 30.6°C (87.1°F) and 22.2°C (72°F).

Temperature

July reports an average high-temperature of a hot 30.6°C (87.1°F), slightly varied from June's 29.5°C (85.1°F). In July, in John, the average low-temperature is an agreeable 22.2°C (72°F).

Heat index

The heat index value for July is evaluated at an extremely hot 42°C (107.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in July in John is 86%.

Rainfall

In John, in July, during 24.5 rainfall days, 107mm (4.21") of precipitation is typically accumulated. In John, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

In July, the average length of the day is 12h and 23min.
On the first day of the month, sunrise is at 06:26 and sunset at 18:50. On the last day of July, sunrise is at 06:30 and sunset at 18:50 -03.

Sunshine

The average sunshine in July in John is 8h.

UV index

The months with the highest UV index are July through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: In July, a regular UV index of 7 translates into these guidelines:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.