March weather forecast
John, French Guiana

March, the first month of the spring in John, is also a moderately hot month, with temperature in the range of an average low of 22.8°C (73°F) and an average high of 29.5°C (85.1°F).

Temperature

March brings an average high-temperature of a still warm 29.5°C (85.1°F), nearly identical to the preceding month. Throughout March, John encounters an average temperature drop to an agreeable 22.8°C (73°F).

Heat index

The heat index in March is evaluated at a very hot 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception 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

The average relative humidity in March is 82%.

Rainfall

In John, French Guiana, in March, it is raining for 25.3 days, with typically 46mm (1.81") of accumulated precipitation. In John, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

In March, the average length of the day is 12h and 6min.
On the first day of the month, sunrise is at 06:45 and sunset at 18:47. On the last day of March, in John, sunrise is at 06:33 and sunset at 18:43 -03.

Sunshine

The average sunshine in March in John is 5.4h.

UV index

January through June and December, with an average maximum UV index of 6, are months with the lowest UV index in John, French Guiana. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 6 in March, converts into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.