January weather forecast
Foz do Iguaçu, Brazil

Starting the year, Foz do Iguaçu in January presents warm conditions characteristic of the summer season. This period sees the peak of solar radiation, with a UV index of 12, emphasizing the need for sun protection. The city experiences its highest temperature at 33°C (91.4°F). Heavy downpours are frequent, contributing to the overall elevated relative humidity typical of tropical climates. Tourists visiting in January should prepare for hot/humid weather and intermittent rains.

Temperature

The warmest temperatures in Foz do Iguaçu occur during January, when averages reach a peak of 33°C (91.4°F) and a low of 19.6°C (67.3°F).

Heat index

In January, the average heat index is computed to be a burning hot 47°C (116.6°F). Vigilance: Heat cramps and heat exhaustion are likely. The likelihood of heatstroke increases with continued activity.
Heat index data is primarily for areas with shade and subjected to light winds. 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 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In Foz do Iguaçu, the average relative humidity in January is 77%.

Rainfall

In Foz do Iguaçu, in January, it is raining for 9 days, with typically 196mm (7.72") of accumulated precipitation. In Foz do Iguaçu, during the entire year, the rain falls for 95 days and collects up to 1869mm (73.58") of precipitation.

Daylight

In Foz do Iguaçu, the average length of the day in January is 13h and 31min.
On the first day of the month, sunrise is at 05:50 and sunset at 19:32. On the last day of January, in Foz do Iguaçu, sunrise is at 06:13 and sunset at 19:30 -03.

Sunshine

In Foz do Iguaçu, Brazil, the average sunshine in January is 7.4h.

UV index

The months with the highest UV index in Foz do Iguaçu are January, February, November and December, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index, 12 during January, leads to the following recommendations:
Ensure every key safety measure. People with light skin might sustain burns in fewer than 5 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim.