Buenos Aires
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Buenos Aires, Argentina

Humidity in September drops further to 70% and as such the temperatures get warmer rising to read between 50°F (10°C) and 66.2°F (19°C) as does the sea temperature that now reads 51.8°F (11°C). Enjoy more sunshine hours than average 6 across the day and take advantage to walk in the sun as it is mildly warm and not so hot. Expect more outdoor activities to come to birth already but don't be scared of the rain as it will not interfere with the warmth in the atmosphere. It might fall for about seven days only across the month hence collecting at an average of 3.1" (78.7mm) and will keep going up in the next few weeks.
  • Average high temperature in September: 19.6°C

Warmest month (with highest average high temperature) is January (30.4°C).
Month with lowest average high temperature is July (16°C).

  • Average low temperature in September: 10.6°C

Month with highest average low temperature is January (20.2°C).
Coldest month (with lowest average low temperature) is July (7.7°C).

  • Average humidity in September: 71%

Months with highest relative humidity are June and July (79%).
Month with lowest relative humidity is December (64%).

  • Average rainfall in September: 75mm

Wettest month (with highest rainfall) is March (172.3mm).
Driest month (with lowest rainfall) is June (54.8mm).

  • Average rainfall days in September: 7.9 days

Month with highest number of rainy days is March (10 days).
Month with lowest number of rainy days is May (6.6 days).

  • Average sea temperature in September: 14.2°C

Best month for swimming (with highest average sea temperature) is January (25°C).
Coldest month (with lowest average sea temperature) is July (11.9°C).

  • Average daylight in September: 12h

Months with longest days are January, November and December (Average daylight: 14h).
Months with shortest days are May, June and July (Average daylight: 10h).

  • Average sunshine in September: 6h

Month with most sunshine is January (Average sunshine: 8.9h).
Months with least sunshine are June and July (Average sunshine: 4.8).

  • Average UV index in September: 6

Months with highest UV index are January and December (UV index 12).
Months with lowest UV index are June and July (UV index 2).