Normal weather for Porto Alegre in September
It's warm in September in Porto Alegre with an average temperature of 29°C. Temperatures this month range from a low of 24°C to a high of 31°C. At night, you can expect temperatures between 14°C and 19°C.
In September, there is an average of 109 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Porto Alegre in September |
London | ||
|---|---|---|---|
 Average Temperature |
29°C | 20°C | |
 High Temp |
31°C | 22°C | |
| Low Temp |
24°C | 17°C | |
 Total Precipitation |
109 mm | 44 mm | |
| Rainy Days |
13 days | 8 days | |
Curious about the climate in other parts of Brazil? Check out the weather and climate in places like Rio de Janeiro, Salvador, Pipa, or have a look at other destinations in Brazil.
Start of September
The month of September starts in Porto Alegre with hot temperatures, averaging around 28°C during the day and nights close to 16°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature rises to around 29°C, with nights close to 17°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Porto Alegre will be around 30°C, with nights close to 18°C. A shower might show up, but overall the weather will be dry and sunny.
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Is September a good time to visit Porto Alegre?
After some sun? Then September isn’t the best time to be in Porto Alegre. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Porto Alegre in September
With 41°C, Porto Alegre hit the highest temperature in the last 10 years in September 2020. The lowest daytime temperature in this month was 14°C in 2018. The extreme night temperatures ranged from a low of 3°C to a high of 25°C.
Check out the climate of Porto Alegre for all months and discover the best travel time
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Daily Temperature in September in Porto Alegre
This chart shows the average daily temperatures, both day and night, for each day in September in Porto Alegre, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Porto Alegre
The chart below shows the average daily precipitation in September for Porto Alegre, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 13 days of rain in Porto Alegre.
Daily UV Index in September in Porto Alegre
This chart shows the average daily UV index in September in Porto Alegre, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Porto Alegre Over the Years
This chart shows the average temperature in September in Porto Alegre, measured in degrees Celsius, over the past years.
Total Precipitation in September in Porto Alegre Over the Years
This chart shows the average precipitation in September in Porto Alegre, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Porto Alegre
Click on a specific day in September for detailed info on the typical weather on that day in Porto Alegre. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Porto Alegre
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Average Weather in Porto Alegre by Month
Click on a month below to see detailed weather info for Porto Alegre. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Porto Alegre for all months at once
