October weather forecast
San Francisco, Guatemala

October, like September, is another tropical autumn month in San Francisco, Guatemala, with an average temperature ranging between min 20.6°C (69.1°F) and max 30.3°C (86.5°F).

Temperature

During October, San Francisco observes a subtle ascent to a still tropical 30.3°C (86.5°F) from September's 32.6°C (90.7°F) in the average high-temperature. Throughout the nights in October, San Francisco experiences an average low-temperature of 20.6°C (69.1°F).

Heat index

The heat index value for October is evaluated at a scorching 40°C (104°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

October through December, with an average relative humidity of 85%, are the most humid months.

Rainfall

In October, in San Francisco, the rain falls for 23.7 days. Throughout October, 119mm (4.69") of precipitation is accumulated. In San Francisco, during the entire year, the rain falls for 227.8 days and collects up to 871mm (34.29") of precipitation.

Daylight

In October, the average length of the day in San Francisco is 11h and 45min.
On the first day of the month, sunrise is at 05:49 and sunset at 17:48. On the last day of October, sunrise is at 05:57 and sunset at 17:29 CST.

Sunshine

In October, the average sunshine in San Francisco is 5.4h.

UV index

In October, the average daily maximum UV index in San Francisco is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 6 during October translates into the following guidance:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely.