What is the weather like in Brussels in September?

Expect temperatures between 12°C and 20°C with 24% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Brussels in September?

Brussels in September scores 64/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Brussels in September?

September in Brussels is ideal for: Outdoor enthusiasts, Cultural tourists, Honeymoon couples, Business travelers.

Brussels Weather in September | 30-Year Forecast

Avg High

20°C

Hottest around day 3

Avg Low

12°C

Coolest around day 30

Rainy Days

13days

24% avg rain chance

Sunshine

8hrs/day

Autumn season

Essential Travel Info for Brussels

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

German

+2 more

Driving

Right side

Safety

High Safety

GPI: 1.526

Travel Intelligence

Exclusive flight analytics & health data for Brussels

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub

80/ 100

Traffic Index

Extremely busy airport

Peak Daily Arrivals

slots per day

Peak

Sep

Low

Jan

Monthly Traffic Distribution

200

Jan

216

Feb

211

Mar

275

Apr

292

May

489

Jun

569

Jul

564

Aug

610

Sep

541

Oct

221

Nov

543

Dec

Traffic Level

Low Season

Key Connections

Madrid Adolfo Suárez –Barajas (MAD)

London Heathrow (LHR)

Barcelona (BCN)

Rome Leonardo da Vinci–Fiumicino (FCO)

Munich (MUC)

Health & Safety Advisory

CDC travel health recommendations

7 Recommendations

COVID-19

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

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

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

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 Belgium.If rabies exposures occur while in Belgium, rabies vaccines may only be available in larger suburban/urban medical facilities.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.

Tick-borne Encephalitis

Avoid bug bitesLearn more abouttick-borne encephalitis at your destination.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Brussels?

👌Good option with minor considerations(64/100)

Short Answer

Brussels's September delivers on its reputation: 20°C, 24% rain, 8.4h sunshine. The trade-off? Peak crowds and prices at 100% capacity.

Decision Factors

Vaccinations required

Yellow Fever

Peak tourist season

100% of annual peak - expect crowds and peak prices

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Tuberculosis (TB)

Plenty of sunshine

8.4h of sunshine daily

Rich cultural heritage

8 UNESCO World Heritage sites nearby

Exceptional dining scene

178 Michelin-listed restaurants

Good For

🥾
Outdoor enthusiasts
Ideal hiking conditions: 19.8°C, 24% rain chance
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 94/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
77% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Brussels in September averages 20°C with 24% precipitation probability."

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

Frequently Asked Questions: Brussels in September

What are the temperatures in Brussels in September?

Daytime highs average 20°C, nights drop to 12°C. Temperatures remain fairly consistent.

How many rainy days in Brussels in September?

Expect around 13 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Brussels in September?

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

Is September peak season in Brussels?

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

Brussels Weather in September

Brussels September Weather Calendar