October weather forecast
San Marcos, El Salvador

In October, San Marcos experiences the peak of the wet season with the highest level of rainfall at 223mm (8.78") over roughly 24 days. Comparatively, temperature ranges remain consistent with the previous month but a notable drop begins. Advantageously, enhanced wind activity can offer a refreshing offset to the muggy weather, with the wind gusts reaching slightly higher at 8.3 KPH. As the wettest month of the year, outdoor activities might be restricted due to a high possibility of showers. This period also marks a transition from the wet season toward the cooler, drier months of November and December.

Temperature

October is the coldest month in San Marcos, with an average high-temperature of 29.7°C (85.5°F) and an average low-temperature of 20.5°C (68.9°F).

Heat index

The average heat index in October is computed to be a fiery hot 37°C (98.6°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', comes about by integrating the temperature readings with the humidity levels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

September and October, with an average relative humidity of 82%, are the most humid months in San Marcos, El Salvador.

Rainfall

In October, in San Marcos, the rain falls for 23.9 days. Throughout October, 223mm (8.78") of precipitation is accumulated. In San Marcos, El Salvador, 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 October in San Marcos is 11h and 49min.
On the first day of the month, sunrise is at 05:46 and sunset at 17:46. On the last day of October, in San Marcos, El Salvador, sunrise is at 05:51 and sunset at 17:29 CST.

Sunshine

The average sunshine in October in San Marcos, El Salvador, is 8.3h.

UV index

The months with the lowest UV index are May through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 6 in October transforms into this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.