September weather forecastMariana, Brazil

September

Weather in September

September, the first month of the spring in Mariana, is still a warm month, with temperature in the range of an average low of 14.4°C (57.9°F) and an average high of 25.1°C (77.2°F).

Temperature

Mariana sees the arrival of September with an average high-temperature of a still moderately hot 25.1°C (77.2°F), indicating a subtle variation from August. An average low-temperature of 14.4°C (57.9°F) marks the nights throughout September.

Humidity

The least humid month is September, with an average relative humidity of 75%.

Rainfall

In Mariana, in September, during 12.7 rainfall days, 44mm (1.73") of precipitation is typically accumulated. In Mariana, Brazil, during the entire year, the rain falls for 225.6 days and collects up to 1112mm (43.78") of precipitation.

Daylight

The average length of the day in September in Mariana is 11h and 59min.
On the first day of the month, sunrise is at 06:01 and sunset at 17:45. On the last day of September, in Mariana, sunrise is at 05:35 and sunset at 17:51 -03.

Sunshine

September has the most sunshine of the year, with an average of 8.3h of sunshine.

UV index

The months with the highest UV index in Mariana, Brazil, are January through December, with an average maximum UV index of 5. The months with the lowest UV index in Mariana, Brazil, are January through December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

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 Mariana, is 25.1°C (77.2°F) and the average low-temperature is 14.4°C (57.9°F).

September is the least humid month in Mariana, Brazil, with an average relative humidity of 75%.

The average relative humidity in September in Mariana is 75%.

In September, the rain falls for 12.7 days. Throughout September, 44mm (1.73") of precipitation is accumulated.

In September, the average day length in Mariana is 11h and 59min.

In September, on the first day of the month, sunrise is at 06:01 and sunset at 17:45. On the last day of the month, sunrise is at 05:35 and sunset at 17:51 -03.

September has the most sunshine of the year in Mariana, Brazil, with an average of 8.3h of sunshine.

The average sunshine duration in September in Mariana is 8.3h.

The months with the highest UV index are January through December, with an average maximum UV index of 5.

January through December, with an average maximum UV index of 5, are months with the lowest UV index in Mariana, Brazil.

The average daily maximum UV index in September in Mariana, Brazil, is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to 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

23.2°C

25.1°C

25.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.6km/h

8.1km/h

8.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

16.9

11.9

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Mariana, Brazil

Average high temperature in September: 25.1°C

The warmest months (with the highest average high temperature) are January and February (25.6°C).
The month with the lowest average high temperature is June (21.4°C).

Average low temperature in September: 14.4°C

The month with the highest average low temperature is December (17.6°C).
The coldest month (with the lowest average low temperature) is August (12.1°C).

Average pressure in September
Mariana, Brazil

Average pressure in September: 1018.1mbar

The month with the highest atmospheric pressure is July (1021.1mbar).
The month with the lowest atmospheric pressure is December (1013mbar).

Average wind speed in September
Mariana, Brazil

Average wind speed in September: 7.8km/h

The windiest month (with the highest average wind speed) is September (7.8km/h).
The calmest months (with the lowest average wind speed) are April and May (5.6km/h).

Average humidity in September
Mariana, Brazil

Average humidity in September: 75%

The month with the highest relative humidity is March (91%).
The month with the lowest relative humidity is September (75%).

Average rainfall in September
Mariana, Brazil

Average rainfall in September: 44mm

The wettest month (with the highest rainfall) is December (193mm).
The driest month (with the least rainfall) is July (13mm).

Average rainfall days in September
Mariana, Brazil

Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is December (26.8 days).
The month with the least rainy days is August (8.9 days).

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

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 18min).
The month with the shortest days is June (Average daylight: 10h and 54min).

Average sunshine in September: 8h and 18min

The month with the most sunshine is September (Average sunshine: 8h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 30min).

Average sunshine days in September
Mariana, Brazil

Average sunshine days in September: 11.9 days

The month with the most sunshine days is August (16.9 days).
The month with the least sunshine days is December (2.1 days).

Average UV index in September
Mariana, Brazil

Average UV index in September: 5

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