June weather forecast
San Marcos, El Salvador

Weather dynamics in June exhibit a slight moderation compared to May. While the month maintains the momentum of the wet season with 179mm (7.05") rainfall across 26 days, this is less than the previous record of 267mm (10.51"). Even so, this rainfall is substantial, and cloud cover of 39% persists. The increased cloudiness results in slightly fewer daily sunshine hours compared to the drier months. It's still fairly warm despite the rain, with a consistent relative humidity of 80% that heightens the muggy feeling in general.

Temperature

With the onset of June, the average high-temperature registers at a still hot 30.8°C (87.4°F), subtly different from May's 31.8°C (89.2°F). In San Marcos, the expected average low-temperature for June is an agreeable 21.7°C (71.1°F).

Heat index

June's heat index is appraised at a scorching 40°C (104°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The average relative humidity in June is 80%.

Rainfall

In San Marcos, during June, the rain falls for 26.2 days and regularly aggregates up to 179mm (7.05") of precipitation. Throughout the year, there are 196.7 rainfall days, and 1216mm (47.87") of precipitation is accumulated.

Daylight

With an average of 12h and 54min of daylight, June has the longest days of the year.
On the first day of the month, sunrise is at 05:28 and sunset at 18:21. On the last day of June, sunrise is at 05:32 and sunset at 18:28 CST.

Sunshine

In June, the average sunshine is 10.4h.

UV index

The months with the lowest UV index are May through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 6 in June translates into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.