Spa Weather in May
May in Spa brings moderate temperatures around 18°C (64°F) during the day, dropping to 8°C (46°F) at night, with quite a bit of rainfall expected, averaging around 83 mm (3.3 in) for the month.
Rainfall in Spa in May
The climate data from previous years indicates about 18 days of rain, averaging 83 mm (3.3 in) for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Spa in May
May in Spa sees highs of 18°C (64°F) and lows of 8°C (46°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Spa in May
There are approximately 195 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Spa in May
Wind speeds average 4 m/s (8 knots) during May. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.If you prefer enjoying temperate temperatures and rain-free days, June and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Spa's climate page.
Spa Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
18°C (64°F)
Chance of Rain
60%
Precipitation
83 mm (3.3 in)
Rainy days
18 days
Humidity
83% *
Windspeed
4 m/s (8 knots) *
Sunshine
195 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Spa typically rise from around 14°C (57°F) at the start of May to approximately 17°C (63°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 9°C (48°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Spa in May
Browse day-by-day weather records for Spa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Spa historical weather extremes in May
The extremes listed below come from historical weather data collected in Spa from 1976 through 2026.
- On May 12, 1998, temperatures climbed to 30°C (86°F), marking the warmest May day on record.
- The lowest daytime temperature in May was 3°C (37°F), recorded on May 4, 1979.
- The lowest overnight temperature recorded in May was -2°C (28°F) (May 3, 2021).
Best Places in Belgium in May
Find out more about the weather in Belgium and which places have the best travel conditions in this month. See all of Belgium in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Spa in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Spa in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Spa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Spa climate overview or explore weather in Belgium.
