What is the weather like in Buenos Aires in September?

Expect temperatures between 11°C and 18°C with 17% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Buenos Aires in September?

Buenos Aires in September scores 66/100 based on 30 years of climate data. Recommended for planning your trip.

Who should visit Buenos Aires in September?

September in Buenos Aires is ideal for: Families with children, Outdoor enthusiasts, Cultural tourists, Honeymoon couples, Business travelers.

Buenos Aires Weather in September | 30-Year Forecast

Avg High

18°C

Hottest around day 29

Avg Low

11°C

Coolest around day 3

Rainy Days

1days

17% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Río de la Plata

15.3°C

Monthly Average

Water Feel

💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating

🏄Cool, wetsuits recommended

Based on average sea surface temperature

Body of Water

Río de la Plata

Buenos Aires coastline

Essential Travel Info for Buenos Aires

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

ARS

$ Argentine peso

Language

Guaraní

+1 more

Driving

Right side

Connect

Cafés and restaurants commonly offer cus...

Safety

High Safety

GPI: 1.911

Travel Intelligence

Exclusive flight analytics & health data for Buenos Aires

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

44/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Dec

Low

Nov

Monthly Traffic Distribution

115

Jan

115

Feb

120

Mar

100

Apr

May

Jun

115

Jul

107

Aug

Sep

114

Oct

Nov

135

Dec

Traffic Level

Low Season

Key Connections

San Carlos de Bariloche (BRC)

Miami (MIA)

Tocumen (PTY)

Madrid Adolfo Suárez –Barajas (MAD)

Rio de Janeiro RIOgaleão – Tom Jobim (GIG)

Health & Safety Advisory

CDC travel health recommendations

8 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Chikungunya

All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Argentina.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Argentina. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Argentina.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Argentina.Rabies is commonly found in some terrestrial wildlife species and bats.If rabies exposures occur while in Argentina, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

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Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Buenos Aires?

👍Recommended for planning your trip(66/100)

Short Answer

Buenos Aires in September features 15.3°C seas - too cold for swimming but stunning for coastal walks. Air temperatures average 18°C with 17% rain probability.

Decision Factors

Vaccinations required

Yellow Fever

Cold sea - swimming challenging

15.3°C sea temperature - Refreshing Tonic

Health precautions needed

Be aware of: Leptospirosis, Chagas disease (American Trypanosomiasis), Dengue

Plenty of sunshine

8.8h of sunshine daily

Shoulder season - balanced conditions

72% of peak - good value with moderate crowds

Exceptional dining scene

52 Michelin-listed restaurants

Good For

👨‍👩‍👧‍👦
Families with children
Comfortable 17.8°C temperatures and low 17% rain risk
🥾
Outdoor enthusiasts
Ideal hiking conditions: 17.8°C, 17% rain chance
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 93/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

🏖️
Beach lovers
Sea temperature only 15.3°C - too cold for comfortable swimming

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Buenos Aires in September averages 18°C with 17% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Buenos Aires in September

What are the temperatures in Buenos Aires in September?

Daytime highs average 18°C, nights drop to 11°C. Temperatures remain fairly consistent.

How many rainy days in Buenos Aires in September?

Expect around 1 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Buenos Aires in September?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is September peak season in Buenos Aires?

This is typically peak season with higher prices. Book 2-3 months ahead.

Buenos Aires Weather in September