Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset in Porto Alegre records an average high-temperature of a still agreeable 22°C (71.6°F), a near match to August's 21.1°C (70°F). The average temperature in Porto Alegre during September nights dips to a mild 13.1°C (55.6°F).Humidity
In Porto Alegre, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 13.9 days. Throughout September, 66mm (2.6") of precipitation is accumulated. In Porto Alegre, during the entire year, the rain falls for 148.3 days and collects up to 805mm (31.69") of precipitation.Sea temperature
In Porto Alegre, the average seawater temperature in September is 16.3°C (61.3°F).Note: Most people do not enjoy swimming in water that is 16.3°C (61.3°F). Breathing becomes increasingly challenging as the water temperature dips under 21°C (69.8°F).
Daylight
The average length of the day in September is 11h and 56min.On the first day of the month, sunrise is at 06:39 and sunset at 18:10. On the last day of September, in Porto Alegre, sunrise is at 06:03 and sunset at 18:25 -03.
Sunshine
The month with the least sunshine is September, with an average of 7h of sunshine.UV index
In Porto Alegre, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What is the average September temperature in Porto Alegre?
What is the average humidity in September in Porto Alegre?
How much does it rain in Porto Alegre in September?
How cold is the water in September in Porto Alegre?
What is the average length of the day in September in Porto Alegre?
What time are sunrise and sunset in September in Porto Alegre?
What is the month with the least sunshine in Porto Alegre?
How many hours of sunshine does Porto Alegre have in September?
What is the UV index intensity in September in Porto Alegre?
Average temperature in September
Porto Alegre, Brazil
- Average high temperature in September: 22°C
The warmest month (with the highest average high temperature) is February (30.5°C).
The month with the lowest average high temperature is July (18.8°C).
- Average low temperature in September: 13.1°C
The months with the highest average low temperature are January and February (20°C).
The coldest month (with the lowest average low temperature) is July (10.6°C).
Average pressure in September
Porto Alegre, 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
Porto Alegre, Brazil
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is October (12.1km/h).
The calmest month (with the lowest average wind speed) is May (10km/h).
Average humidity in September
Porto Alegre, Brazil
- Average humidity in September: 80%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is December (71%).
Average rainfall in September
Porto Alegre, Brazil
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is July (103mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in September
Porto Alegre, Brazil
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is October (15 days).
The month with the least rainy days is April (9.8 days).
Average sea temperature in September
Porto Alegre, 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
Porto Alegre, Brazil
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 12min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is December (Average sunshine: 8h and 18min).
The month with the least sunshine is September (Average sunshine: 7h and 0min).
Average sunshine days in September
Porto Alegre, Brazil
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is May (19.9 days).
The month with the least sunshine days is September (14.4 days).
Average UV index in September
Porto Alegre, 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
Porto Alegre, Brazil
- Average cloud cover in September: 41
The month with the most cloud cover is September (Cloud cover 41).
The month with the least cloud cover is November (Cloud cover 32).
Average visibility in September
Porto Alegre, 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).
Porto Alegre, Brazil
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