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

San Salvador's weather, upon January's arrival, documents an average high-temperature of a tropical 30.6°C (87.1°F), nearly identical to the prior month. Nighttime temperature experiences an average drop to a comfortable 19.4°C (66.9°F) in January.

Heat index

January's average heat index is calculated to be a very hot 35°C (95°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

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

Rainfall

January is the month with the least rainfall in San Salvador, El Salvador. Rain falls for 1.9 days and accumulates 1mm (0.04") of precipitation.

Daylight

In San Salvador, the average length of the day in January is 11h and 26min.
On the first day of the month, sunrise is at 06:20 and sunset at 17:40. On the last day of January, 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

January, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A daily high UV index of 6 in January leads to these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.