January weather forecast
San Salvador, El Salvador

January starts the year on a bright note in San Salvador, with an environment well-suited for outdoor activities. The weather remains largely stable with mild temperature variations. Clear skies dominate the cityscape while high visibility contributes to scenic views of the landscape. Comparative data indicates less mugginess opposed to subsequent months and an average daily maximum UV index of 6 units. Note that rainfall seldom occurs, with the tantalizingly low amount of barely 1mm (0.04") produced over an average of only 1.9 days.

Temperature

With the advent of January, San Salvador experiences an average high-temperature of a hot 30.6°C (87.1°F), mirroring a close resemblance to the previous month. Throughout January, an average low-temperature of 19.4°C (66.9°F) is experienced.

Heat index

Throughout January, the heat index is appraised at a sweltering 35°C (95°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. 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 essentially critical for children. 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In January, the average relative humidity in San Salvador, El Salvador, is 65%.

Rainfall

The month with the least rainfall in San Salvador is January, when the rain falls for 1.9 days and typically collects 1mm (0.04") of precipitation.

Daylight

The average length of the day in January is 11h and 26min.
On the first day of January, sunrise is at 06:20 and sunset at 17:40. On the last day of the month, sunrise is at 06:24 and sunset at 17:56 CST.

Sunshine

January and December, with an average of 7.7h of sunshine, are months with the least sunshine.

UV index

The months with the lowest UV index are January, May, June, August through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 6 during January translates into the following guidance:
Guard against overexposure. Protection from sun-induced harm is essential. 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. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.