Monthly climate averages for Roy, Belgium. Based on 10-year ERA5 reanalysis data.
Cfb Oceanic
Climate OverviewRoy, Belgium in August has warm conditions, with highs averaging 21.8°C (71°F). Rain falls on about 14 days this month.
This month falls at the end of Summer.
Temperatures remain fairly steady throughout August, with daily highs around 21°C (70°F).
August sees fairly even rainfall, totalling about 77 mm across the month.
The warmest days tend to fall around the 13th, averaging 23.5°C (74°F).
Temperatures begin dropping heading into September.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 22°C (71°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.
1 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -1°C | 0°C / -5°C | 15days (110 mm) Wet | 3.2h Poor | 90% Very Muggy | 1.1 Low | Poor | View Details |
| February | 7°C / 0°C | 2°C / -4°C | 13days (84 mm) Wet | 5h Fair | 84% Humid | 1.7 Low | Poor | View Details |
| March | 9°C / 1°C | 5°C / -3°C | 14days (85 mm) Wet | 7h Good | 79% Humid | 3.6 Moderate | Poor | View Details |
| April | 13°C / 3°C | 10°C / 0°C | 12days (62 mm) Wet | 9.7h Good | 74% Muggy | 4.6 Moderate | Poor | View Details |
| May | 17°C / 7°C | 15°C / 5°C | 12days (76 mm) Wet | 10.7h Excellent | 74% Muggy | 5.6 High | Fair | View Details |
| June best | 21°C / 12°C | 20°C / 10°C | 13days (98 mm) Wet | 11.2h Excellent | 75% Muggy | 6.3 High | Excellent | View Details |
| July best | 21°C / 13°C | 21°C / 11°C | 13days (82 mm) Wet | 11.2h Excellent | 73% Muggy | 5.8 High | Excellent | View Details |
| August best | 22°C / 13°C | 21°C / 12°C | 14days (78 mm) Wet | 10.3h Excellent | 75% Muggy | 5.6 High | Excellent | View Details |
| September best | 18°C / 10°C | 17°C / 8°C | 12days (80 mm) Wet | 8.6h Good | 79% Humid | 4.2 Moderate | Good | View Details |
| October | 14°C / 8°C | 11°C / 5°C | 14days (90 mm) Wet | 5.5h Fair | 85% Humid | 2.5 Moderate | Fair | View Details |
| November | 8°C / 3°C | 5°C / -1°C | 14days (75 mm) Wet | 3.9h Poor | 89% Very Muggy | 1.3 Low | Poor | View Details |
| December | 5°C / 1°C | 2°C / -3°C | 16days (96 mm) Wet | 2.6h Poor | 91% Very Muggy | 0.9 Low | Poor | View Details |
Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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