January weather forecast
Cuiabá, Brazil

January is the month that historically begins the year with high temperatures in Cuiabá, Brazil. The most remarkable characteristics are the high temperatures that reach an average maximum of 32.6°C (90.7°F) and a humidity level of about 78%. This makes January both hot and rainy, a combination that results from the convective processes peculiar to the summer season. A thought should also be given to the level of UV radiation, warning residents to take protective measures when going outside. The weather varies slightly as the days of January pass, providing an interesting start to the year.

Temperature

The transition into January shows a subtle variation to a still tropical 32.6°C (90.7°F) from December's 32.5°C (90.5°F) in the average high-temperature. An average low-temperature of 23.2°C (73.8°F) marks the nights throughout January.

Heat index

The heat index in January is evaluated at a burning hot 46°C (114.8°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In January, the average relative humidity in Cuiabá is 78%.

Rainfall

The month with the most rainfall is January, when the rain falls for 19 days and typically aggregates up to 210mm (8.27") of precipitation.

Daylight

The average length of the day in January is 12h and 56min.
On the first day of January in Cuiabá, Brazil, sunrise is at 05:16 and sunset at 18:18. On the last day of the month, sunrise is at 05:33 and sunset at 18:21 -04.

Sunshine

January has the least sunshine of the year, with an average of 5h of sunshine.

UV index

January through March, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 12 suggests these recommendations:
Take every vital safeguard, as unprotected skin and eyes may suffer burns rapidly. 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. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. One must apply and reapply generously an SPF 30+ broad-spectrum sunscreen every two hours or after an outdoor workout or swim.