September weather forecast
Cobija, Bolivia

Come September, Cobija starts transitioning from the dryness of August, marking a rise in rainfall to 52mm (2.05"). While temperatures continue to be steady and warm, humidity gradually increases, preparing for the upcoming wet season. Alongside, the increased cloud cover cuts down on sunshine hours. Daylight availability remains consistent with the past couple of months. As a shifting climate envelops the city, September's weather inches towards the heavier precipitation months, presenting a blend of warm dryness and slight moisture.

Temperature

September, on average, is the warmest month, registering a high temperature of 34.3°C (93.7°F) and a low of 21.6°C (70.9°F).

Heat index

September's heat index is computed to be a scorching 43°C (109.4°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful 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.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Cobija, the average relative humidity in September is 61%.

Rainfall

In September, the rain falls for 15.1 days. Throughout September, 52mm (2.05") of precipitation is accumulated. Throughout the year, there are 253 rainfall days, and 1428mm (56.22") of precipitation is accumulated.

Daylight

In Cobija, the average length of the day in September is 12h and 3min.
On the first day of September, sunrise is at 06:37 and sunset at 18:32. On the last day of the month, sunrise is at 06:18 and sunset at 18:30 -04.

Sunshine

In Cobija, Bolivia, the average sunshine in September is 9.3h.

UV index

July through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.