January weather forecast
Mana, French Guiana

Compared to the rest of the year, January in Mana, French Guiana showcases a stable weather pattern. Despite the continuous hovering of the thermometer in the 29.4°C (84.9°F) range, a relative humidity of 82% signifies a humid start of the year. A quick transition to February could result in notable differences in weather patterns. The overall daytime weather could be characterized by overcast skies, with cloud cover comprising 54% of the total sky. Coastal promenades can be less enjoyable due to a steady breeze, blowing at 9.1km/h (5.7mph).

Temperature

January's advent presents an average high-temperature of a moderately hot 29.4°C (84.9°F), indicating a slight variation from the conditions of the previous month. January's nights observe an average temperature of 22.4°C (72.3°F).

Heat index

The heat index value for January is evaluated at a very hot 36°C (96.8°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In January, the average relative humidity in Mana, French Guiana, is 82%.

Rainfall

In Mana, in January, it is raining for 23.6 days, with typically 54mm (2.13") of accumulated precipitation. Throughout the year, in Mana, there are 253 rainfall days, and 878mm (34.57") of precipitation is accumulated.

Sea temperature

In Mana, in January, the average water temperature is 27.1°C (80.8°F).
Note: For any water activity, the surface water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are deemed excellent and incredibly pleasant for longer durations.

Daylight

The average length of the day in January in Mana is 11h and 50min.
On the first day of January in Mana, sunrise is at 06:44 and sunset at 18:32. On the last day of the month, sunrise is at 06:52 and sunset at 18:44 -03.

Sunshine

The average sunshine in January is 6.3h.

UV index

The months with the lowest UV index in Mana are January through June and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 6 in January transforms into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be alert! The reflection of water and sand augments UV radiation intensity.