Roy, Belgium experiences average highs of 13°C (55°F) and lows of 6°C (43°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Average highs have warmed by 1.4°C (2.5°F) across the available records.
Roy, Belgium Weather & Climate 2026
Monthly climate averages for Roy, Belgium. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.5/10
Best: June, July, August, September
UV Index
4
Low
Temperature 13°C / 6°C
Feels Like 11°C / 3°C
Rainy Days 14
Rainfall 85 mm
Sunshine 7 h
Humidity 81%
Wind Speed 20 km/h
Dew Point 6°C
Snow Days 5 days
Frost Days 11 days
Hottest Month
22°C
August
Avg Low13°C
Rain14days
Coldest Month
-1°C
January
Avg High4°C
Rain15days
Driest Month
12days
April
Avg High13°C
Avg Low3°C
Windiest Month
24 km/h
February (Gusts 46)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:29
Daylight 16.4h
Sunset 21:51
Live conditions—
Roy on the map · live conditions
Roy, Belgium
- Continent
- Europe
- Country
- Belgium
- City
- Roy
- Population
- 696
- Coordinates
- 50.18°, 5.41°
Seasonal Breakdown
Spring
Mar–May
Avg High 13°C
Avg Low 4°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 21°C
Avg Low 12°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 7°C
Rain 13 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 5°C
Avg Low 0°C
Rain 15 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 4°C / -1°C . Feb: 7°C / 0°C . Mar: 9°C / 1°C . Apr: 13°C / 3°C . May: 17°C / 7°C . Jun: 21°C / 12°C . Jul: 21°C / 13°C . Aug: 22°C / 13°C . Sep: 18°C / 10°C . Oct: 14°C / 8°C . Nov: 8°C / 3°C . Dec: 5°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 110 mm. Feb: 84 mm. Mar: 85 mm. Apr: 62 mm. May: 76 mm. Jun: 98 mm. Jul: 82 mm. Aug: 78 mm. Sep: 80 mm. Oct: 90 mm. Nov: 75 mm. Dec: 96 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 90%. Feb: 84%. Mar: 79%. Apr: 74%. May: 74%. Jun: 75%. Jul: 73%. Aug: 75%. Sep: 79%. Oct: 85%. Nov: 89%. Dec: 91%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 24 km/h . Mar: 22 km/h . Apr: 19 km/h . May: 18 km/h . Jun: 17 km/h . Jul: 17 km/h . Aug: 17 km/h . Sep: 18 km/h . Oct: 21 km/h . Nov: 21 km/h . Dec: 22 km/h .
Sunshine
Sunshine
Sunshine: Jan: 3h. Feb: 5h. Mar: 7h. Apr: 10h. May: 11h. Jun: 11h. Jul: 11h. Aug: 10h. Sep: 9h. Oct: 6h. Nov: 4h. Dec: 3h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 6. Aug: UV 6. Sep: UV 4. Oct: UV 3. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 9 days. Feb: 5 days. Mar: 4 days. Apr: 2 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 3 days. Dec: 5 days.
Climate Trends
Average highs have warmed by 1.4°C (2.5°F) across the available records. Average rainfall is trending drier by about 11 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 22°C | Aug · 22°C |
| Coldest month | Jan 2025 · -1°C | Jan · -1°C |
| Wettest month | Jan 2025 · 167 mm | Jan · 110 mm |
| Windiest month | Jan 2025 · 22 km/h | Feb · 24 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September best
Good October
Fair November
Poor December
Poor | 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 |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Roy are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Roy, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Roy is August, with average daytime highs of 22°C (71°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Roy is January, with average overnight lows of -1°C (30°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Roy is January, averaging 110mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Roy runs through December, January, March, August, with the heaviest rainfall in December. Based on 10-year averages for Roy.
Roy receives approximately 89 sunshine hours per year. The sunniest month is June with around 11 hours. Based on climate data for Roy.
The least favorable months to visit Roy are January, February, March, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Roy is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Roy is 81%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes, Roy receives snow. Months with snowfall average 5 snow days and 6 cm (2 in) of accumulation, with about 11 frost days during winter.
Average wind speeds in Roy are 20 km/h (12 mph). The windiest month is February with peak winds reaching 24 km/h (15 mph) (gusts up to 46 km/h / 29 mph).
Roy averages 3 clear-sky days per month with overall cloud cover around 68%. The clearest skies occur in March.
The annual average dew point in Roy is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Roy has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Roy ranges from 3°C (37°F) to 11°C (52°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Roy. It earns a climate score of 7.7/10 with Excellent.
For June in Roy, pack Warm evening layer, Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses. With average highs of 21°C (69°F) and 13 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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