January weather forecast
Santa Fé do Sul, Brazil

January, like December, in Santa Fé do Sul, Brazil, is a moderately hot summer month, with an average temperature varying between 21.6°C (70.9°F) and 29.6°C (85.3°F).

Temperature

The onset of January brings an average high-temperature of a moderately hot 29.6°C (85.3°F), nearly matching the December temperature. Throughout January, the temperature tends to fall to a consistent average low of 21.6°C (70.9°F).

Heat index

For most parts of January, the heat index is calculated to be a fiery hot 37°C (98.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Santa Fé do Sul, the average relative humidity in January is 83%.

Rainfall

The month with the most rainfall is January, when the rain falls for 29.3 days and typically aggregates up to 219mm (8.62") of precipitation.

Daylight

In January, the average length of the day is 13h and 11min.
On the first day of January in Santa Fé do Sul, sunrise is at 05:47 and sunset at 19:07. On the last day of the month, sunrise is at 06:06 and sunset at 19:07 -03.

Sunshine

With an average of 7.1h of sunshine, January has the least sunshine of the year.

UV index

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 6 in January suggests the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.