Buenos Aires is warmest in January, averaging 28° by day and 22° at night. The wettest month is March with 115 mm, and the year brings about 754 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 28° | 22° | 81 mm | 26° | 14.1 h | Beach weather |
| February | 27° | 22° | 81 mm | 26° | 13.3 h | Beach weather |
| March | 26° | 19° | 115 mm | 24° | 12.3 h | Mild |
| April | 22° | 17° | 78 mm | 21° | 11.1 h | Sightseeing |
| May | 17° | 13° | 47 mm | 17° | 10.2 h | Sightseeing |
| June | 15° | 10° | 33 mm | 14° | 9.7 h | Mild |
| July | 14° | 9° | 28 mm | 13° | 9.9 h | Mild |
| August | 16° | 10° | 59 mm | 14° | 10.7 h | Mild |
| September | 18° | 12° | 57 mm | 16° | 11.8 h | Sightseeing |
| October | 21° | 15° | 47 mm | 19° | 12.9 h | Sightseeing |
| November | 25° | 18° | 75 mm | 22° | 13.8 h | Sightseeing |
| December | 27° | 20° | 53 mm | 24° | 14.3 h | Beach weather |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: January, February and December — highs around 27°, nights no colder than 20°, and at most 81 mm of rain in a month. The sea sits at 24–26° then.
Walking the city: April, May, September, October and November — highs of 17–25° and no more than 78 mm of rain a month.