January weather forecast
Riacho Frio, Brazil

January, the same as December, in Riacho Frio, Brazil, is a hot summer month, with an average temperature varying between 30.3°C (86.5°F) and 19.6°C (67.3°F).

Temperature

The transition from December to January sees average high-temperatures adjusting to a still hot 30.3°C (86.5°F), from a not significantly different 31.3°C (88.3°F). Riacho Frio registers a consistent average low-temperature of 19.6°C (67.3°F) during January.

Heat index

In January, the heat index is estimated at a very hot 38°C (100.4°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Consider that heat index readings are for situations in the shade and light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

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

Rainfall

In Riacho Frio, during January, the rain falls for 19.3 days and regularly aggregates up to 91mm (3.58") of precipitation. Throughout the year, there are 134.3 rainfall days, and 578mm (22.76") of precipitation is accumulated.

Daylight

In January, the average length of the day is 12h and 38min.
On the first day of the month, sunrise is at 05:42 and sunset at 18:24. On the last day of January, sunrise is at 05:56 and sunset at 18:29 -03.

Sunshine

In Riacho Frio, the average sunshine in January is 9.6h.

UV index

The months with the lowest UV index in Riacho Frio are January through July, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 6 during January leads to these instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.