September weather forecast
Cabo Blanco, Costa Rica

The first month of the autumn, September, is also a moderately hot month in Cabo Blanco, Costa Rica, with an average temperature varying between 28.8°C (83.8°F) and 23.4°C (74.1°F).

Temperature

September records an average high-temperature of a still warm 28.8°C (83.8°F), indicating a minor variation from the preceding month. An average low-temperature of 23.4°C (74.1°F) is observed during September nights in Cabo Blanco, Costa Rica.

Heat index

In September, the heat index is appraised at a fiery hot 35°C (95°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. 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.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in September in Cabo Blanco, Costa Rica, is 82%.

Rainfall

In Cabo Blanco, in September, during 28.7 rainfall days, 209mm (8.23") of precipitation is typically accumulated. In Cabo Blanco, Costa Rica, during the entire year, the rain falls for 248.3 days and collects up to 1708mm (67.24") of precipitation.

Daylight

In September, the average length of the day in Cabo Blanco is 12h and 11min.
On the first day of September, sunrise is at 05:30 and sunset at 17:48. On the last day of the month, sunrise is at 05:28 and sunset at 17:30 CST.

Sunshine

In September, the average sunshine is 8.2h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Cabo Blanco. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.