Buenos Aires weather in January
Buenos Aires in January averages 25°C (76°F), 135 mm of rain and 9.4 hours of sun a day.
Of the twelve months in Buenos Aires, January is the warmest, the wettest and the sunniest.
- Average temp
- 25°C (76°F)
21–29°C · 69–83°F
- Rainfall
- 135 mm
Showers likely
- Sunshine
- 9.4 h
hours per day
What is Buenos Aires like in January?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Buenos Aires in January?
High-factor sun cream
With 9.4 hours of sun a day, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 135 mm falls this month — showers rather than washouts.
January compared with December and February
January in Buenos Aires is 1.5°C warmer than December and 28 mm wetter than it, which averages 23°C (74°F).
January in Buenos Aires is 1.3°C warmer than February and 41 mm wetter than it, which averages 23°C (74°F).
Daylight in Buenos Aires in January
On 15 January the sun is up for 14 hours 13 minutes in Buenos Aires, rising about 05:56 and setting about 20:09 local time.
January ends 37 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
Where to stay in Buenos Aires
Dates are a starting point for January.
Travel guides for Buenos Aires
What to read before you book.
Buenos Aires weather by month
TemperatureRainfall
How January compares with the rest of the year
January is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 25°C / 76°F | 135 mm |
| February | 23°C / 74°F | 94 mm |
| March | 22°C / 72°F | 123 mm |
| April | 18°C / 65°F | 122 mm |
| May | 15°C / 60°F | 85 mm |
| June | 12°C / 54°F | 54 mm |
| July | 11°C / 53°F | 50 mm |
| August | 13°C / 56°F | 52 mm |
| September | 15°C / 58°F | 58 mm |
| October | 18°C / 64°F | 98 mm |
| November | 21°C / 69°F | 87 mm |
| December | 23°C / 74°F | 107 mm |
Check another month
This is the month you are reading. Change either side to look at another.
FAQs about Buenos Aires in January
January climate averages for Buenos Aires, 1991–2020.
Buenos Aires averages 25°C (76°F) in January, ranging from about 21°C (69°F) at night to 29°C (83°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 135 mm falls across January, enough to need a light jacket but not enough to reshape a trip.
Yes. January averages 25°C (76°F) against 23°C (74°F) in February — 1.3°C warmer.
January is 1.5°C warmer than December, and 28 mm wetter.
It is outside the easiest window. The most comfortable stretch here is February to April; January sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
About 9.4 hours of sun a day on the 1991–2020 average — among the brighter months anywhere.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what January is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 14 hours 13 minutes of daylight in mid-January, against 14 hours 28 minutes in December and 9 hours 51 minutes in June.
On 15 January, sunrise is about 05:56 and sunset about 20:09 local time. Both shift across the month — the month ends 37 minutes shorter than it starts.
