January weather forecast
San Juan Tepezontes, El Salvador

January, like December, is another tropical winter month in San Juan Tepezontes, El Salvador, with an average temperature varying between 18.9°C (66°F) and 31.5°C (88.7°F).

Temperature

In San Juan Tepezontes, the average high-temperature in January is almost the same as in December - a still tropical 31.5°C (88.7°F). In San Juan Tepezontes, in January, the average low-temperature is 18.9°C (66°F).

Heat index

In January, the average heat index is evaluated at a very hot 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, metabolic differences, wind, and pregnancy affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In January, the average relative humidity is 63%.

Rainfall

The month with the least rainfall in San Juan Tepezontes is January, when the rain falls for 1.5 days and typically collects 1mm (0.04") of precipitation.

Daylight

In January, the average length of the day in San Juan Tepezontes is 11h and 26min.
On the first day of the month, sunrise is at 06:19 and sunset at 17:39. On the last day of January, sunrise is at 06:23 and sunset at 17:55 CST.

Sunshine

The months with the least sunshine in San Juan Tepezontes are January and December, with an average of 7.7h of sunshine.

UV index

The months with the lowest UV index are January, June through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.