Best time to visit Brussels
Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
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.
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 Brussels
10 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Brussels).
- 1
Day Trip to Mechelen & Leuven: Two Cities, One Great Experience - 2
Brussels Highlights & Hidden Gems Bike Tour - 3
Airport Transfer: Brussels to Brussels Airport BRU by Luxury Van - 4
Brussels: Historical Walking Tour with Chocolate & Waffle Tasting - 5
Brussels Walking and Tasting Tour (Beers,Chocolates&Fries/Waffle) - 6
Hungry Mary's Famous Beer and Chocolate Tour in Brussels - 7
Belgian Beer Tasting in Brussels - 8
Brussels Chocolate Beer Waffle and Belgian Whiskey All-in-One (Small Group) Tour - 9
Tell Me About Brussels! | First Day Must-Do | Local Storytellers - 10
Luxembourg and Dinant Day Trip from Brussels
Last refreshed 2026-06-26.
Similar climatesLeuven98% · Mechelen98% · Antwerp98%
Other destinations with the most-alike year-round climate to Brussels (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 Brussels'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 | 2–7 | 2 | 12 | 165 | 13.8 | 84% | 24 | 83 | 1 | Quiet | 3 |
| Feb | 3–9 | 5 | 13 | 166 | 12.8 | 77% | 27 | 104 | 1 | Quiet | 4 |
| Mar | 4–11 | 8 | 13 | 174 | 13.4 | 69% | 22 | 166 | 2 | Quiet | 5 |
| Apr | 5–14 | 11 | 11 | 136 | 12.4 | 61% | 21 | 214 | 3 | Quiet | 6 |
| May | 9–18 | 16 | 12 | 139 | 11.6 | 62% | 20 | 254 | 4 | Quiet | 7 |
| Jun | 13–22 | 21 | 10 | 122 | 12.2 | 60% | 18 | 260 | 5 | Quiet | 8 |
| Jul | 14–22 | 22 | 13 | 149 | 11.5 | 63% | 19 | 262 | 5 | Quiet | 8 |
| Aug | 15–24 | 23 | 13 | 133 | 10.2 | 62% | 19 | 253 | 5 | Busy | 8 |
| Sep | 12–21 | 20 | 12 | 131 | 10.9 | 67% | 18 | 208 | 3 | Moderate | 8 |
| Oct | 10–16 | 14 | 14 | 147 | 10.5 | 76% | 23 | 143 | 2 | Moderate | 6 |
| Nov | 5–11 | 7 | 13 | 144 | 11.1 | 83% | 22 | 97 | 1 | Peak | 4 |
| Dec | 3–7 | 4 | 15 | 175 | 11.7 | 87% | 23 | 62 | 1 | Moderate | 3 |
UV Index in Brussels by Month
UV index in Brussels peaks at 5 (moderate) in June, dropping to 1 (low) in January.
Best months in detail
June
8/1013–22°C · 10 rain days (122h) · 260 sun hours · 60% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
August
8/1015–24°C · 13 rain days (133h) · 253 sun hours · 62% humidity · Busy crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
September
8/1012–21°C · 12 rain days (131h) · 208 sun hours · 67% humidity · Moderate crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
Every month
Show the other 9 months in detail
January
3/102–7°C (feels 2°C) · 12 rain days (165h) · 83 sun hours · 84% humidity · Quiet crowd · UV 1 (low)
February
4/103–9°C (feels 5°C) · 13 rain days (166h) · 104 sun hours · 77% humidity · Quiet crowd · UV 1 (low)
March
5/104–11°C (feels 8°C) · 13 rain days (174h) · 166 sun hours · 69% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
April
6/105–14°C (feels 11°C) · 11 rain days (136h) · 214 sun hours · 61% humidity · Quiet crowd · UV 3 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
May
7/109–18°C (feels 16°C) · 12 rain days (139h) · 254 sun hours · 62% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
July
8/1014–22°C · 13 rain days (149h) · 262 sun hours · 63% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
October
6/1010–16°C (feels 14°C) · 14 rain days (147h) · 143 sun hours · 76% humidity · Moderate crowd · UV 2 (low)
November
4/105–11°C (feels 7°C) · 13 rain days (144h) · 97 sun hours · 83% humidity · Peak crowd · UV 1 (low)
December
3/103–7°C (feels 4°C) · 15 rain days (175h) · 62 sun hours · 87% humidity · Moderate crowd · UV 1 (low)
Frequently asked questions about visiting Brussels
When is the best time to visit Brussels?
June is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 13–22°C (10 rainy days). The top three months by score are June, August, September.
What is the worst time to visit Brussels?
December is the lowest-scoring month (3/10). Typical conditions: 3–7°C (15 rainy days).
When are crowds lowest in Brussels?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January 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 Brussels have good weather but fewer tourists?
June (climate 8/10, crowd index 11) and July (climate 8/10, crowd index 16) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Brussels by month?
UV peaks at 5 (moderate) in June and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 1, Mar 2, Apr 3, May 4, Jun 5, Jul 5, Aug 5, Sep 3, Oct 2, Nov 1, Dec 1.
What is the UV index in Brussels in June?
June is the peak UV month in Brussels, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Brussels 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. June is the worst case: typical days average UV 5 (moderate), but the top 10% of days reach UV 7 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, April, May, June, July, August, September. Plan sun protection for the worst case, not the average.
Is air quality in Brussels bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 8 months: January, February, March, April, May, October, November, December. The worst month is March with a typical-day mean of 14 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 29 µg/m³ (unhealthy) 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.