What is the weather like in Brussels throughout the year?

Brussels experiences varying weather throughout the year. The warmest month is August with average highs of 23°C. The coolest month is January.

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.

Best Time to Visit Brussels | 30-Year Weather Analysis

Why September is the Best Time to Visit Brussels

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

Warmest

August

23°C avg

Coolest

January

6°C avg

Driest

April

22% rain

Wettest

December

30% rain

Planning Your Trip to Brussels, Belgium

Wondering when is the best time to visit Brussels? Based on our analysis of 30 years of NASA satellite weather data, the ideal months to travel to Brussels are September, June, July. During these months, you'll experience optimal temperatures around 20°C with only 24% chance of rain.

The Brussels climate varies throughout the year. August is the hottest month with average highs of 23°C, while January is the coldest at 6°C. If you're planning outdoor activities or sightseeing in Brussels, avoid December when rainfall peaks at 30% probability.

For the best Brussels weather experience, we recommend visiting during April for the driest conditions or the shoulder months of September and June for a perfect balance of weather and fewer crowds.

Brussels Weather by Month: Climate Guide

Click any month to explore detailed daily forecasts for Brussels

🏆 85-100: Excellent👍 70-84: Great👌 55-69: Good🤔 40-54: Fair⚠️ 0-39: Challenging

When to Visit Brussels: Travel Style Guide

Personalized Brussels travel recommendations based on 30-year weather data

Budget Travelers

Shoulder season with good weather and lower prices

MarchOctober

Avoiding Crowds

Fewer tourists with acceptable weather conditions

JanuaryFebruaryMarch

Photography

Best light conditions with clear skies

AprilSeptemberJune

Winter Escape

Escape the cold with warmest temperatures

MayJuneJuly

Honeymoon

Perfect conditions for a romantic getaway

AprilMayJune

Brussels Weather FAQ: Your Questions Answered

What is the best time to visit Brussels?

Based on 30 years of weather data, the best months to visit Brussels are September, June, July. These months offer the optimal combination of pleasant temperatures (20°C avg) and low rainfall (24% chance).

When is the hottest time of year in Brussels?

August is historically the warmest month in Brussels with average highs of 23°C. If you prefer cooler weather, consider visiting in January when temperatures average around 6°C.

When is the rainy season in Brussels?

December typically sees the most rainfall in Brussels with a 30% chance of rain. For the driest conditions, plan your visit in April when rain probability drops to just 22%.

How accurate is the Brussels weather forecast?

Our Brussels climate analysis is based on 30 years of NASA POWER satellite observations (1995-2024), providing highly accurate historical averages. While weather can vary year to year, these long-term patterns are excellent indicators for planning your trip to Brussels.

What should I pack for Brussels?

Packing depends on when you visit. In August (warmest month), pack light summer clothes for 23°C weather. In January (coolest month), bring layers for 6°C temperatures.

Is Brussels good for a destination wedding?

Yes! The best months for an outdoor wedding in Brussels are April (only 22% rain chance) and September for optimal weather conditions. Avoid December when rain probability peaks at 30%.