September weather forecastGuaíba, Brazil
September
Weather in September
The first month of the spring, September, is still a pleasant month in Guaíba, Brazil, with an average temperature fluctuating between 13.3°C (55.9°F) and 21.8°C (71.2°F).Temperature
The arrival of September is marked by an average high-temperature of a still agreeable 21.8°C (71.2°F), bearing a close resemblance to August. During September, Guaíba records an average temperature of 13.3°C (55.9°F) at night.Humidity
In Guaíba, Brazil, the average relative humidity in September is 81%.Rainfall
In Guaíba, during September, the rain falls for 14.6 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, there are 162.4 rainfall days, and 881mm (34.69") of precipitation is accumulated.Sea temperature
In Guaíba, the average seawater temperature in September is 16.3°C (61.3°F).Note: The majority of people do not enjoy swimming in 16.3°C (61.3°F). The difficulty in controlling breathing escalates as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September is 11h and 56min.On the first day of September in Guaíba, sunrise is at 06:39 and sunset at 18:10. On the last day of the month, sunrise is at 06:03 and sunset at 18:26 -03.
Sunshine
With an average of 7.3h of sunshine, September has the least sunshine of the year.UV index
The average daily maximum UV index in September in Guaíba is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Take precautions - Protection against sun damage is advised. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Guaíba, Brazil
- Average high temperature in September: 21.8°C
The warmest months (with the highest average high temperature) are January and February (30.1°C).
The month with the lowest average high temperature is July (18.3°C).
- Average low temperature in September: 13.3°C
The month with the highest average low temperature is February (20.3°C).
The coldest month (with the lowest average low temperature) is July (10.5°C).
Average pressure in September
Guaíba, Brazil
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is July (1019.8mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).
Average wind speed in September
Guaíba, Brazil
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is October (13km/h).
The calmest month (with the lowest average wind speed) is May (10.7km/h).
Average humidity in September
Guaíba, Brazil
- Average humidity in September: 81%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is December (73%).
Average rainfall in September
Guaíba, Brazil
- Average rainfall in September: 72mm
The wettest month (with the highest rainfall) is July (101mm).
The driest month (with the least rainfall) is April (46mm).
Average rainfall days in September
Guaíba, Brazil
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is January (17 days).
The month with the least rainy days is June (10.9 days).
Average sea temperature in September
Guaíba, Brazil
- Average sea temperature in September: 16.3°C
The best month for swimming (with the highest average sea temperature) is January (24.7°C).
The coldest month (with the lowest average sea temperature) is August (15.8°C).
Average daylight in September /
Average sunshine in September
Guaíba, Brazil
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 6min).
The month with the shortest days is June (Average daylight: 10h and 12min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is December (Average sunshine: 8h and 36min).
The month with the least sunshine is September (Average sunshine: 7h and 18min).
Average sunshine days in September
Guaíba, Brazil
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is May (18.1 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in September
Guaíba, Brazil
- Average UV index in September: 5
The month with the highest UV index is December (UV index 7).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in September
Guaíba, Brazil
- Average cloud cover in September: 39
The month with the most cloud cover is September (Cloud cover 39).
The month with the least cloud cover is November (Cloud cover 29).
Average visibility in September
Guaíba, Brazil
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
