Best time to visit Buenos Aires

Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Saved to this browser. Changes update the strips below.
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Day · avg daily high (?)
Night · avg overnight low (?)
Heatwaves · days/yr ≥35°C ETCCDI TX35 (?)
<11<1
Tropical nights · nights/yr ≥20°C ETCCDI TR20 — sleep killer (?)
2215152<1512
UV index · On a typical day around midday, UV is about this (?)
11974322357911
On the sunniest 1 in 10 days, UV reaches this — and even higher
13121064791113
PM2.5 air quality · on a typical day (?)
79989121179787
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
111314141423211313101011
December 9/10 feels 26°C · HCI 95/100
Day 27° · Night 19° · cools 8° at night ⚠ <1 days/yr ≥35° · peak 2 in worst year 🌙 12 tropical nights/yr · peak 19 ☀ UV 10.5 (very high) 53% humidity 24 km/h wind 7 rain days (58h) 293h sun
Thermal 10
Sky 10
Rain 9
Wind 9

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Tours in Buenos Aires

18 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Buenos Aires).

  1. 1Buenos Aires City Private Tour with Local Guide4.87★ (3,823)4hfrom $120
  2. 2Join a Local Family Asado in Buenos Aires with Betty and Marcelo4.99★ (809)3hfrom $79
  3. 3Private Airport Transfer In or Out : Ezeiza (EZE) – Buenos Aires4.97★ (615)from $67
  4. 4Intimate Underground Tango Show by Secreto Tango Society4.99★ (1,295)1hfrom $70
  5. 5Two Stadiums: Boca Juniors & River Plate Tour Experience5.00★ (2)4hfrom $99🔥 Selling fast
  6. 6Private Tour of Buenos Aires and Delta del Tigre with Local Guide5.00★ (23)8hfrom $101
  7. 7Authentic Rooftop Asado Experience with Argentine Wine Pairing4.94★ (360)2h 30mfrom $80
  8. 8Buenos Aires Private City Tour with Local Guide4.95★ (386)4hfrom $98
  9. 9Discover the Best of Buenos Aires on a Full-Day Private Tour4.99★ (165)from $144
  10. 10Gaucho Small-Group Full Day at a Farm in Buenos Aires4.84★ (1,043)9hfrom $168
  11. 11Local Foodie Adventure in Buenos Aires with Sherpa Food Tours4.97★ (7,937)3h 30mfrom $90
  12. 12Cooking Class Designed by Michelin Chef @ Argentine Experience4.99★ (1,321)3hfrom $50
  13. 13Bike Tour: Half-Day City Highlights of Buenos Aires4.88★ (1,163)4hfrom $45
  14. 14Historical Sherpa Food Tour of San Telmo with Street Food, Drinks4.97★ (1,056)3h 30mfrom $69
  15. 15Argentine Experience Interactive Dining and Cooking4.95★ (1,502)3hfrom $116
  16. 16Recoleta Cemetery Walking Tour4.88★ (738)2hfrom $12
  17. 17Recoleta Cemetery Tour in English4.88★ (525)from $16
  18. 18Piazzolla Tango Show and Dinner in Buenos Aires3.86★ (7)4hfrom $110🔥 Selling fast

Last refreshed 2026-05-25.

Similar climatesSantiago86% · Adelaide85% · Melbourne84%

Other destinations with the most-alike year-round climate to Buenos Aires (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Buenos Aires's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan 21–29 29 8 74 9.3 55% 26 282 11 Quiet 8
Feb 20–28 28 7 80 11.4 58% 24 245 9 Quiet 9
Mar 19–26 26 9 100 11.1 66% 23 236 7 Quiet 8
Apr 15–21 20 8 80 10.0 68% 22 198 4 Quiet 8
May 10–17 15 4 52 13.0 69% 22 188 3 Quiet 8
Jun 8–15 12 7 57 8.1 74% 21 169 2 Quiet 7
Jul 7–14 11 6 59 9.8 72% 22 184 2 Quiet 7
Aug 9–16 13 6 56 9.3 68% 23 194 3 Busy 8
Sep 11–18 16 6 69 11.5 65% 24 203 5 Moderate 8
Oct 13–22 19 7 70 10.0 57% 25 245 7 Moderate 9
Nov 17–25 24 8 62 7.8 55% 25 260 9 Peak 9
Dec 19–27 26 7 58 8.3 53% 24 293 11 Busy 9

UV Index in Buenos Aires by Month

UV index in Buenos Aires peaks at 11 (extreme) in January, dropping to 2 (low) in June. January, February, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

Best months in detail

December

9/10

19–27°C · 7 rain days (58h) · 293 sun hours · 53% humidity · Busy crowd · UV 11 (very high) · sunniest 1 in 10 days reach 13 (extreme)

November

9/10

17–25°C (feels 24°C) · 8 rain days (62h) · 260 sun hours · 55% humidity · Peak crowd · UV 9 (very high) · sunniest 1 in 10 days reach 11 (extreme)

October

9/10

13–22°C (feels 19°C) · 7 rain days (70h) · 245 sun hours · 57% humidity · Moderate crowd · UV 7 (high) · sunniest 1 in 10 days reach 9 (very high)

Every month

Show the other 9 months in detail

January

8/10

21–29°C · 8 rain days (74h) · 282 sun hours · 55% humidity · Quiet crowd · UV 11 (extreme) · sunniest 1 in 10 days reach 13 (extreme)

February

9/10

20–28°C · 7 rain days (80h) · 245 sun hours · 58% humidity · Quiet crowd · UV 9 (very high) · sunniest 1 in 10 days reach 12 (extreme)

March

8/10

19–26°C · 9 rain days (100h) · 236 sun hours · 66% humidity · Quiet crowd · UV 7 (high) · sunniest 1 in 10 days reach 10 (very high)

April

8/10

15–21°C (feels 20°C) · 8 rain days (80h) · 198 sun hours · 68% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (high)

May

8/10

10–17°C (feels 15°C) · 4 rain days (52h) · 188 sun hours · 69% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)

June

7/10

8–15°C (feels 12°C) · 7 rain days (57h) · 169 sun hours · 74% humidity · Quiet crowd · UV 2 (low)

July

7/10

7–14°C (feels 11°C) · 6 rain days (59h) · 184 sun hours · 72% humidity · Quiet crowd · UV 2 (low)

August

8/10

9–16°C (feels 13°C) · 6 rain days (56h) · 194 sun hours · 68% humidity · Busy crowd · UV 3 (moderate)

September

8/10

11–18°C (feels 16°C) · 6 rain days (69h) · 203 sun hours · 65% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

Comparisons people search for

Pairs validated by Google Autocomplete demand — only pairs people actually compare.

Frequently asked questions about visiting Buenos Aires

When is the best time to visit Buenos Aires?

December is the highest-scoring month (9/10 on the Holiday Climate Index). Typical conditions: 19–27°C (7 rainy days). The top three months by score are December, November, October.

What is the worst time to visit Buenos Aires?

June is the lowest-scoring month (7/10). Typical conditions: 8–15°C (7 rainy days).

When are crowds lowest in Buenos Aires?

Search-interest seasonality (Google Trends 2021-2025) is lowest in May and peaks in November. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

Which months in Buenos Aires have good weather but fewer tourists?

February (climate 9/10, crowd index 4) and October (climate 9/10, crowd index 43) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Buenos Aires by month?

UV peaks at 11 (extreme) in January and is lowest in June at 2 (low). Monthly peak values: Jan 11, Feb 9, Mar 7, Apr 4, May 3, Jun 2, Jul 2, Aug 3, Sep 5, Oct 7, Nov 9, Dec 11. January, February, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

What is the UV index in Buenos Aires in January?

January is the peak UV month in Buenos Aires, with a daily-peak UV index of 11 (extreme). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).

How high can UV get in Buenos Aires on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. January is the worst case: typical days average UV 11 (extreme), but the top 10% of days reach UV 13 (extreme) — and even higher. Months where the sunniest days routinely exceed the typical reading: January, February, March, April, May, September, October, November, December. Plan sun protection for the worst case, not the average.

Is air quality in Buenos Aires bad for travelers?

PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 2 months: June, July. The worst month is June with a typical-day mean of 12 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 23 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.