March weather forecast
San Marcos, El Salvador

March carries similar weather patterns to February, while showing a slight increase in temperature and rainfall. The warm days of March coupled with an average UV index of 7 may require wearing sunblock for those spending extended periods outdoors. It's also the month where the daily sunshine hours begin to extend, offering more daylight to enjoy activities. However, the increased warmth results in a somewhat lower humidity level in comparison to the previous months. March records an uptick in rainfall, with an average of 6mm (0.24") falling over nearly seven days.

Temperature

San Marcos witnesses its highest average temperatures during March and April, peaking at 33.4°C (92.1°F).

Heat index

The heat index value for March is computed to be a blistering 41°C (105.8°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Be aware that heat index ratings are designed for shaded locations and minor breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance 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 physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

The least humid month in San Marcos is March, with an average relative humidity of 61%.

Rainfall

In San Marcos, El Salvador, in March, it is raining for 6.8 days, with typically 6mm (0.24") of accumulated precipitation. In San Marcos, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

The average length of the day in March is 12h and 4min.
On the first day of the month, sunrise is at 06:12 and sunset at 18:05. On the last day of March, in San Marcos, sunrise is at 05:52 and sunset at 18:08 CST.

Sunshine

In March, the average sunshine is 10.5h.

UV index

The months with the highest UV index are January through April, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 7 during March leads to these instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.