September weather forecast
Caxias, Brazil

September, the first month of the spring in Caxias, is a sweltering month, with temperature in the range of an average low of 22.2°C (72°F) and an average high of 36.2°C (97.2°F).

Temperature

Caxias's shift into September is marked by a subtle change to a torrid 36.2°C (97.2°F) from August's 34.7°C (94.5°F) in temperature. In September, the nighttime temperature in Caxias, Brazil, plummets remarkably from the daily apex to a steady average of 22.2°C (72°F).

Heat index

September's mean heat index is calculated to be a blazing hot 45°C (113°F). Be on the lookout: Heat cramps and heat exhaustion are anticipated. Continued exertion can result in heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance 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.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The least humid month is September, with an average relative humidity of 53%.

Rainfall

August and September are months with the least rain in Caxias when the rain falls for 7.9 days and typically aggregates up to 10mm (0.39") of rain.

Daylight

In Caxias, the average length of the day in September is 12h and 5min.
On the first day of September, sunrise is at 05:52 and sunset at 17:53. On the last day of the month, sunrise is at 05:38 and sunset at 17:47 -03.

Sunshine

The month with the most sunshine is September, with an average of 9.5h of sunshine.

UV index

The months with the highest UV index in Caxias are January, April through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 7 during September translates into these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.