September weather forecastCaseara, Brazil

September

Weather in September

The first month of the spring, September, is still a very hot month in Caseara, Brazil, with an average temperature varying between 23.8°C (74.8°F) and 37.2°C (99°F).

Temperature

September, having an average high-temperature of 37.2°C (99°F) and an average low-temperature of 23.8°C (74.8°F), is the warmest month.

Heat index

For September, the heat index is calculated to be an extremely hot 42°C (107.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

August and September, with an average relative humidity of 40%, are the least humid months.

Rainfall

In Caseara, in September, during 4.6 rainfall days, 8mm (0.31") of precipitation is typically accumulated. In Caseara, Brazil, during the entire year, the rain falls for 213.3 days and collects up to 1154mm (45.43") of precipitation.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 06:21 and sunset at 18:17. On the last day of the month, sunrise is at 06:04 and sunset at 18:15 -03.

Sunshine

In September, the average sunshine in Caseara is 9.6h.

UV index

May through September and November, 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 the ordinary person.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

With average high temperatures of 37.2°C (99°F) and lows of 23.8°C (74.8°F), September is the warmest month in Caseara.

An average high-temperature, in September, in Caseara, is 37.2°C (99°F) and the average low-temperature is 23.8°C (74.8°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, in September is calculated to be 42°C (107.6°F).

The months with the lowest humidity in Caseara, Brazil, are August and September, with an average relative humidity of 40%.

The average relative humidity in September in Caseara, Brazil, is 40%.

In Caseara, during September, the rain falls for 4.6 days and regularly aggregates up to 8mm (0.31") of precipitation.

In September, the average day length in Caseara is 12h and 4min.

In September, on the first day of the month, sunrise is at 06:21 and sunset at 18:17. On the last day of the month, sunrise is at 06:04 and sunset at 18:15 -03.

In Caseara, the average sunshine duration in September is 9.6h.

May through September and November, with an average maximum UV index of 7, are months with the highest UV index in Caseara.

The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

36.4°C

37.2°C

35.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.7km/h

7.1km/h

6.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

30.3

23.7

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Caseara, Brazil

Average high temperature in September: 37.2°C

The warmest month (with the highest average high temperature) is September (37.2°C).
The month with the lowest average high temperature is February (30.4°C).

Average low temperature in September: 23.8°C

The month with the highest average low temperature is September (23.8°C).
The coldest month (with the lowest average low temperature) is July (20.3°C).

Average pressure in September
Caseara, Brazil

Average pressure in September: 1010.7mbar

The months with the highest atmospheric pressure are June and July (1013.4mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).

Average wind speed in September
Caseara, Brazil

Average wind speed in September: 6.5km/h

The windiest month (with the highest average wind speed) is August (6.7km/h).
The calmest month (with the lowest average wind speed) is March (4.2km/h).

Average humidity in September
Caseara, Brazil

Average humidity in September: 40%

The months with the highest relative humidity are February and March (85%).
The months with the lowest relative humidity are August and September (40%).

Average rainfall in September
Caseara, Brazil

Average rainfall in September: 8mm

The wettest month (with the highest rainfall) is March (204mm).
The driest month (with the least rainfall) is August (1mm).

Average rainfall days in September
Caseara, Brazil

Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is March (29.6 days).
The month with the least rainy days is August (0.6 days).

Average daylight in September /
Average sunshine in September
Caseara, Brazil

Average daylight in September: 12h and 6min

The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 36min).

Average sunshine in September: 9h and 36min

The month with the most sunshine is October (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).

Average sunshine days in September
Caseara, Brazil

Average sunshine days in September: 23.7 days

The month with the most sunshine days is August (30.3 days).
The month with the least sunshine days is March (0.6 days).

Average UV index in September
Caseara, Brazil

Average UV index in September: 7

The months with the highest UV index are May, June, July, August, September and November (UV index 7).
The months with the lowest UV index are January, February, March, April, October and December (UV index 6).