September weather forecast
Óbidos, Brazil

The first month of the spring, September, is also a fiery hot month in Óbidos, Brazil, with an average temperature fluctuating between 24.3°C (75.7°F) and 36°C (96.8°F).

Temperature

Óbidos, Brazil, indicates an average high-temperature of a still sweltering 36°C (96.8°F) in September, showing minor variation from August's 35.1°C (95.2°F). In the month of September, the average low-temperature in Óbidos, Brazil, usually rests at a warm 24.3°C (75.7°F).

Heat index

For September, the heat index is evaluated at a blazing hot 47°C (116.6°F). Attention: Heat exhaustion and heat cramps are quite likely. Heatstroke becomes a risk with continued exertion.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

September is the least humid month, with an average relative humidity of 57%.

Rainfall

In Óbidos, during September, the rain falls for 9.3 days and regularly aggregates up to 18mm (0.71") of precipitation. Throughout the year, there are 212.5 rainfall days, and 1026mm (40.39") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 6min.
On the first day of September, sunrise is at 06:39 and sunset at 18:44. On the last day of the month, sunrise is at 06:28 and sunset at 18:35 -03.

Sunshine

The months with the most sunshine are August and September, with an average of 9.8h of sunshine.

UV index

September is the month with the highest UV index in Óbidos, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 8 in September, converts into the following recommendations:
It is essential to prioritize protection. Unprotected skin and eyes can suffer rapid harm. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.