September weather forecastMonte Sião, Brazil

September

Weather in September

The first month of the spring, September, is also a moderately hot month in Monte Sião, Brazil, with temperature in the range of an average high of 27°C (80.6°F) and an average low of 14.5°C (58.1°F).

Temperature

The beginning of September records an average high-temperature of a still warm 27°C (80.6°F), marking a negligible difference from August's 24.8°C (76.6°F). In September, the temperature in Monte Sião registers a significant dip to an average of 14.5°C (58.1°F) at night.

Heat index

For most parts of September, the heat index is computed to be 29°C (84.2°F). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

With an average relative humidity of 67%, September is the least humid month in Monte Sião.

Rainfall

In September, in Monte Sião, the rain falls for 10.2 days. Throughout September, 35mm (1.38") of precipitation is accumulated. In Monte Sião, during the entire year, the rain falls for 199.3 days and collects up to 850mm (33.46") of precipitation.

Daylight

The average length of the day in September is 11h and 59min.
On the first day of the month, sunrise is at 06:15 and sunset at 17:56. On the last day of September, in Monte Sião, Brazil, sunrise is at 05:47 and sunset at 18:04 -03.

Sunshine

With an average of 9.2h of sunshine, September has the most sunshine of the year in Monte Sião, Brazil.

UV index

March through September, with an average maximum UV index of 5, are months with the lowest UV index in Monte Sião. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

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

Frequently asked questions

An average high-temperature, in September, in Monte Sião, is 27°C (80.6°F) and the average low-temperature is 14.5°C (58.1°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is computed to be 29°C (84.2°F).

September is the least humid month, with an average relative humidity of 67%.

In September, the average relative humidity in Monte Sião, Brazil, is 67%.

In September, in Monte Sião, Brazil, the rain falls for 10.2 days. Throughout September, 35mm (1.38") of precipitation is accumulated.

The average day length in September is 11h and 59min.

In September, on the first day of the month, sunrise is at 06:15 and sunset at 17:56. On the last day of the month, sunrise is at 05:47 and sunset at 18:04 -03.

The month with the most sunshine in Monte Sião, Brazil, is September, with an average of 9.2h of sunshine.

In September, the average sunshine duration in Monte Sião, Brazil, is 9.2h.

March through September, with an average maximum UV index of 5, are months with the lowest UV index in Monte Sião.

In September, the average daily maximum UV index in Monte Sião, Brazil, is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

24.8°C

27°C

27.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.5km/h

9.7km/h

9.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

23.8

17.8

11.9

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Monte Sião, Brazil

Average high temperature in September: 27°C

The warmest month (with the highest average high temperature) is October (27.4°C).
The month with the lowest average high temperature is June (21.8°C).

Average low temperature in September: 14.5°C

The months with the highest average low temperature are January and December (17.5°C).
The coldest month (with the lowest average low temperature) is July (11.6°C).

Average pressure in September
Monte Sião, Brazil

Average pressure in September: 1017.1mbar

The month with the highest atmospheric pressure is July (1020.4mbar).
The month with the lowest atmospheric pressure is December (1012.1mbar).

Average wind speed in September
Monte Sião, Brazil

Average wind speed in September: 9.3km/h

The windiest month (with the highest average wind speed) is September (9.3km/h).
The calmest month (with the lowest average wind speed) is March (7.1km/h).

Average humidity in September
Monte Sião, Brazil

Average humidity in September: 67%

The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is September (67%).

Average rainfall in September
Monte Sião, Brazil

Average rainfall in September: 35mm

The wettest month (with the highest rainfall) is January (164mm).
The driest month (with the least rainfall) is August (15mm).

Average rainfall days in September
Monte Sião, Brazil

Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is January (26.6 days).
The month with the least rainy days is August (6.1 days).

Average daylight in September /
Average sunshine in September
Monte Sião, Brazil

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).

Average sunshine in September: 9h and 12min

The month with the most sunshine is September (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 7h and 24min).

Average sunshine days in September
Monte Sião, Brazil

Average sunshine days in September: 17.8 days

The month with the most sunshine days is August (23.8 days).
The month with the least sunshine days is February (3.3 days).

Average UV index in September
Monte Sião, Brazil

Average UV index in September: 5

The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are March, April, May, June, July, August and September (UV index 5).

Average cloud cover in September
Monte Sião, Brazil

Average cloud cover in September: 23

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 19).

Average visibility in September
Monte Sião, Brazil

Average visibility in September: 9km

The months with the highest visibility are July, August, September and October (9km).
The months with the lowest visibility are January, February, March, April and May (7km).