September weather forecast
Altinópolis, Brazil

September

Weather in September

The first month of the spring, September, is a tropical month in Altinópolis, Brazil, with an average temperature ranging between max 30.4°C (86.7°F) and min 17.8°C (64°F).

Temperature

September, with average temperatures reaching a high of 30.4°C (86.7°F) and a low of 17.8°C (64°F), is the warmest month.

Heat index

In September, the average heat index is computed to be a hot 32°C (89.6°F). With extended exposure and activity, one might feel exhausted and experience heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

September is the least humid month, with an average relative humidity of 54%.

Rainfall

In Altinópolis, in September, during 9.5 rainfall days, 43mm (1.69") of precipitation is typically accumulated. In Altinópolis, during the entire year, the rain falls for 231.2 days and collects up to 1433mm (56.42") of precipitation.

Daylight

In Altinópolis, Brazil, the average length of the day in September is 11h and 59min.
On the first day of September, sunrise is at 06:17 and sunset at 18:00. On the last day of the month, sunrise is at 05:50 and sunset at 18:07 -03.

Sunshine

September has the most sunshine of the year, with an average of 9.4h of sunshine.

UV index

January, July through October, with an average maximum UV index of 6, are months with the highest UV index in Altinópolis. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 6 in September transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Frequently asked questions

What time of the year is the hottest in Altinópolis?
The warmest month is September, with an average high-temperature of 30.4°C (86.7°F) and an average low-temperature of 17.8°C (64°F).
Is it hot in Altinópolis during September?
The high-temperature, in September, in Altinópolis, is 30.4°C (86.7°F), while the low-temperature averages to 17.8°C (64°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in September is computed to be 32°C (89.6°F).
What is the least humid month in Altinópolis?
The least humid month in Altinópolis, Brazil, is September, with an average relative humidity of 54%.
What is the average humidity in September in Altinópolis?
The average relative humidity in September in Altinópolis is 54%.
How many days does it rain in September in Altinópolis?
In Altinópolis, in September, during 9.5 rainfall days, 43mm (1.69") of precipitation is typically accumulated.
How many hours of daylight does Altinópolis have in September?
In September, the average day length in Altinópolis, Brazil, is 11h and 59min.
When are sunrise and sunset in September in Altinópolis?
On the first day of September in Altinópolis, sunrise is at 06:17 and sunset at 18:00. On the last day of the month, sunrise is at 05:50 and sunset at 18:07 -03.
What month has the most sunshine in Altinópolis?
With an average of 9.4h of sunshine, September has the most sunshine of the year in Altinópolis.
How many hours of sunshine does Altinópolis have in September?
The average sunshine duration in September in Altinópolis is 9.4h.
What is the month with the highest UV index in Altinópolis?
January, July through October, with an average maximum UV index of 6, are months with the highest UV index in Altinópolis, Brazil.
What is the UV index reading in September in Altinópolis?
In Altinópolis, Brazil, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Altinópolis, Brazil
Average temperature in September
Altinópolis, Brazil
  • Average high temperature in September: 30.4°C

The warmest month (with the highest average high temperature) is September (30.4°C).
The month with the lowest average high temperature is June (23.7°C).

  • Average low temperature in September: 17.8°C

The month with the highest average low temperature is December (19.3°C).
The coldest month (with the lowest average low temperature) is June (14.1°C).

Average pressure in September - Altinópolis, Brazil
Average pressure in September
Altinópolis, Brazil
  • Average pressure in September: 1015.5mbar

The month with the highest atmospheric pressure is July (1019.4mbar).
The months with the lowest atmospheric pressure are November and December (1011.5mbar).

Average wind speed in September - Altinópolis, Brazil
Average wind speed in September
Altinópolis, Brazil
  • Average wind speed in September: 9.5km/h

The windiest month (with the highest average wind speed) is August (9.6km/h).
The calmest month (with the lowest average wind speed) is February (6.6km/h).

Average humidity in September - Altinópolis, Brazil
Average humidity in September
Altinópolis, Brazil
  • Average humidity in September: 54%

The month with the highest relative humidity is March (89%).
The month with the lowest relative humidity is September (54%).

Average rainfall in September - Altinópolis, Brazil
Average rainfall in September
Altinópolis, Brazil
  • Average rainfall in September: 43mm

The wettest month (with the highest rainfall) is January (259mm).
The driest month (with the least rainfall) is August (10mm).

Average rainfall days in September - Altinópolis, Brazil
Average rainfall days in September
Altinópolis, Brazil
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is January (29.8 days).
The month with the least rainy days is August (4.2 days).

Average daylight in September / Average sunshine in September - Altinópolis, Brazil
Average daylight in September /
Average sunshine in September
Altinópolis, Brazil
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is September (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).

Average sunshine days in September - Altinópolis, Brazil
Average sunshine days in September
Altinópolis, Brazil
  • Average sunshine days in September: 19.1 days

The month with the most sunshine days is August (26.3 days).
The months with the least sunshine days are January and March (0.8 days).

Average UV index in September - Altinópolis, Brazil
Average UV index in September
Altinópolis, Brazil
  • Average UV index in September: 6

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

Average cloud cover in September - Altinópolis, Brazil
Average cloud cover in September
Altinópolis, Brazil
  • Average cloud cover in September: 19

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in September - Altinópolis, Brazil
Average visibility in September
Altinópolis, Brazil
  • Average visibility in September: 10km

The months with the highest visibility are August and September (10km).
The months with the lowest visibility are January, February, March, April, May and December (7km).

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