September weather forecastIrapuã, Brazil

September

Weather in September

The first month of the spring, September, is a hot month in Irapuã, Brazil, with an average temperature fluctuating between 18.5°C (65.3°F) and 31.3°C (88.3°F).

Temperature

The high-temperature average in September for Irapuã is a tropical 31.3°C (88.3°F), staying closely aligned with August's conditions. Irapuã observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 18.5°C (65.3°F).

Heat index

The heat index value for September is evaluated at a tropical 34°C (93.2°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely significant for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

August and September, with an average relative humidity of 54%, are the least humid months in Irapuã.

Rainfall

In September, in Irapuã, the rain falls for 8.2 days. Throughout September, 44mm (1.73") of precipitation is accumulated. In Irapuã, during the entire year, the rain falls for 204.1 days and collects up to 1207mm (47.52") 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 06:26 and sunset at 18:08. On the last day of September, in Irapuã, sunrise is at 05:58 and sunset at 18:16 -03.

Sunshine

The months with the most sunshine are August and September, with an average of 9.4h of sunshine.

UV index

January through April, June through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in September interprets into the following advice:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

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

Frequently asked questions

In September, the average high-temperature and low-temperature are 31.3°C (88.3°F) and 18.5°C (65.3°F) respectively. In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 34°C (93.2°F).

The months with the lowest humidity are August and September, with an average relative humidity of 54%.

The average relative humidity in September in Irapuã is 54%.

In Irapuã, Brazil, during September, the rain falls for 8.2 days and regularly aggregates up to 44mm (1.73") of precipitation.

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

On the first day of September in Irapuã, Brazil, sunrise is at 06:26 and sunset at 18:08. On the last day of the month, sunrise is at 05:58 and sunset at 18:16 -03.

The months with the most sunshine in Irapuã, Brazil, are August and September, with an average of 9.4h of sunshine.

In Irapuã, Brazil, the average sunshine duration in September is 9.4h.

The months with the highest UV index are January through April, June through December, with an average maximum UV index of 6.

In Irapuã, Brazil, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat 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

28.8°C

31.3°C

31.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.7km/h

11.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

26.6

20.6

12.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Irapuã, Brazil

Average high temperature in September: 31.3°C

The warmest month (with the highest average high temperature) is October (31.4°C).
The month with the lowest average high temperature is June (24.7°C).

Average low temperature in September: 18.5°C

The month with the highest average low temperature is December (21°C).
The coldest month (with the lowest average low temperature) is June (15.3°C).

Average pressure in September
Irapuã, Brazil

Average pressure in September: 1014.4mbar

The month with the highest atmospheric pressure is July (1018.3mbar).
The months with the lowest atmospheric pressure are November and December (1010.4mbar).

Average wind speed in September
Irapuã, Brazil

Average wind speed in September: 10.5km/h

The windiest month (with the highest average wind speed) is August (10.6km/h).
The calmest month (with the lowest average wind speed) is February (7.4km/h).

Average humidity in September
Irapuã, Brazil

Average humidity in September: 54%

The month with the highest relative humidity is March (86%).
The months with the lowest relative humidity are August and September (54%).

Average rainfall in September
Irapuã, Brazil

Average rainfall in September: 44mm

The wettest month (with the highest rainfall) is January (226mm).
The driest month (with the least rainfall) is July (8mm).

Average rainfall days in September
Irapuã, Brazil

Average rainfall days in September: 8.2 days

The month with the highest number of rainy days is January (28.7 days).
The month with the least rainy days is August (3.9 days).

Average daylight in September /
Average sunshine in September
Irapuã, 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 24min

The months with the most sunshine are August and September (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 7h and 0min).

Average sunshine days in September
Irapuã, Brazil

Average sunshine days in September: 20.6 days

The month with the most sunshine days is August (26.6 days).
The month with the least sunshine days is February (1.3 days).

Average UV index in September
Irapuã, Brazil

Average UV index in September: 6

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

Average cloud cover in September
Irapuã, Brazil

Average cloud cover in September: 18

The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in September
Irapuã, Brazil

Average visibility in September: 10km

The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May and December (8km).