September weather forecast
Guayaquil, Ecuador

As Guayaquil saunters into September, it welcomes a revitalizing twist to a fading summer narrative, showcasing the finesse of its tropical elegance. Rainfall sees a slight uptick registering at 25mm (0.98"), signaling the start of a tender graduation from the arid peak. A subtle decline in wind gusts accompanies this gentle incline, smoothing out the earlier breezy excesses. Concurrently, sea temperatures too flirt with a slight renewal, modestly rising off the yearly low. Subtle yet pronounced, these changes pivot the city towards the cooler, rain-tinged end of the year.

Temperature

The arrival of September records an average high-temperature of a still hot 32.4°C (90.3°F), closely related to the 31.8°C (89.2°F) observed in August. Against the backdrop of high daytime temperatures, an average low-temperature of 20.3°C (68.5°F) is noted during September nights.

Heat index

The heat index value for September is appraised at a blisteringly hot 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

In Guayaquil, the average relative humidity in September is 71%.

Rainfall

In Guayaquil, in September, it is raining for 12 days, with typically 25mm (0.98") of accumulated precipitation. In Guayaquil, during the entire year, the rain falls for 235.3 days and collects up to 1397mm (55") of precipitation.

Sea temperature

The month with the coldest seawater in Guayaquil, Ecuador, is September, with an average sea temperature of 22.6°C (72.7°F).
Note: When thinking about a swim in 22.6°C (72.7°F) waters, consider your cold tolerance, the day's sunshine, wind, and air temperature. It is a fun fact that Olympic swimmers dive into waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

The average length of the day in September is 12h and 6min.
On the first day of the month, sunrise is at 06:17 and sunset at 18:21. On the last day of September, in Guayaquil, sunrise is at 06:05 and sunset at 18:13 -05.

Sunshine

In September, the average sunshine in Guayaquil, Ecuador, is 9.1h.

UV index

September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Skirt overexposure. People with light complexions might get scorched 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. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Notice! Sand and water reflections contribute to a stronger UV exposure.