September weather forecast
First Savannah, Guyana

The first month of the autumn, September, is still a tropical month in First Savannah, Guyana, with an average temperature fluctuating between 22.9°C (73.2°F) and 33.1°C (91.6°F).

Temperature

First Savannah's September weather, marked by an average high temperature of 33.1°C (91.6°F) and an average low temperature of 22.9°C (73.2°F), is the warmest in the year.

Heat index

For most parts of September, the heat index is appraised at a burning hot 48°C (118.4°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The months with the lowest humidity in First Savannah, Guyana, are September and October, with an average relative humidity of 78%.

Rainfall

The month with the least rainfall is September, when the rain falls for 21 days and typically collects 55mm (2.17") of precipitation.

Daylight

The average length of the day in September in First Savannah is 12h and 9min.
On the first day of September, sunrise is at 05:43 and sunset at 17:57. On the last day of the month, sunrise is at 05:38 and sunset at 17:42 -04.

Sunshine

In September, the average sunshine in First Savannah is 9h.

UV index

The months with the highest UV index in First Savannah are March, April, July through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 7 during September leads to these advisories:
Take precautions against overexposure. Protection against sun damage is needed. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.