Lanús climate by month
What the weather is like
Lanús has a humid subtropical climate (Köppen Cfa): rain spread through the year and no real dry season.
The warmest month is January, when afternoons average 28° and nights 20°. July is the coolest month, with highs of 14° and lows of 7°. The difference between the warmest and the coolest month is about 13°.
About 1,113 mm of precipitation falls in an average year. March is the wettest month (124 mm, 9 wet days) and June the driest (49 mm, 4 wet days). Cloud cover ranges from 26% in January to 40% in June.
The sea reaches about 25° in January. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Buenos Aires, the capital, Lanús is 1° warmer on a January afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 28° · January
- Coldest nights
- 7° · July
- Wettest month
- March
- Driest month
- June
- Clearest skies
- January · 26% cloud
- Warmest sea
- 25° · January
- Longest day
- 14 h 28 min
- Shortest day
- 9 h 50 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 28° | 27° | 25° | 21° | 17° | 14° | 14° | 16° | 17° | 20° | 23° | 26° |
| Average low | 20° | 19° | 18° | 14° | 11° | 8° | 7° | 9° | 10° | 13° | 16° | 18° |
| Precipitation | 126 mm | 116 mm | 124 mm | 102 mm | 86 mm | 49 mm | 51 mm | 54 mm | 63 mm | 117 mm | 111 mm | 114 mm |
| Wet days (≥1 mm) | 7.7 | 7.7 | 8.8 | 7.2 | 5 | 4 | 4.2 | 4.3 | 4.7 | 6.3 | 8.5 | 7.2 |
| Cloud cover | 26% | 27% | 28% | 31% | 36% | 40% | 38% | 35% | 35% | 35% | 31% | 28% |
| Sea temperature | 25° | 25° | 23° | 21° | 17° | 14° | 13° | 13° | 15° | 18° | 21° | 23° |
| Daylight | 14h 13 | 13h 20 | 12h 20 | 11h 13 | 10h 19 | 9h 50 | 10h 02 | 10h 49 | 11h 51 | 12h 56 | 13h 56 | 14h 28 |
| Month score | 71 | 76 | 79 | 83 | 82 | 66 | 63 | 75 | 83 | 83 | 80 | 78 |