September weather forecast
Arroyo Grande, Colombia

September, the first month of the autumn in Arroyo Grande, is also a hot month, with an average temperature ranging between min 26.8°C (80.2°F) and max 30.5°C (86.9°F).

Temperature

Arroyo Grande records an average high-temperature of a still hot 30.5°C (86.9°F) in September, closely mirroring the climate of the previous month. In Arroyo Grande, the September nights are characterized by an average low-temperature of 26.8°C (80.2°F), a minor dip from daytime readings.

Heat index

The heat index value for September is computed to be a fiery hot 38°C (100.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In Arroyo Grande, the average relative humidity in September is 77%.

Rainfall

In Arroyo Grande, during September, the rain falls for 25.5 days and regularly aggregates up to 150mm (5.91") of precipitation. In Arroyo Grande, during the entire year, the rain falls for 210.6 days and collects up to 1115mm (43.9") of precipitation.

Daylight

In Arroyo Grande, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:51 and sunset at 18:10. On the last day of September, sunrise is at 05:50 and sunset at 17:52 -05.

Sunshine

The average sunshine in September is 10.2h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.