May Weather in Spa, Belgium

Last updated: August 21, 2025

In May, Spa, Belgium, experiences a delightful range of temperatures, peaking at a maximum of 30°C (87°F) while settling at an average of 12°C (55°F) and dipping to a minimum of -1°C (31°F). This month brings 81 mm (3.2 in) of precipitation across 15 days, contributing to the region's lush greenery. With humidity levels around 77%, visitors can expect a refreshing atmosphere ideal for exploring the serene landscapes and historic charm of Spa. Whether basking in the sun or enjoying the soothing rain, May offers a diverse and captivating climate for all.

May Temperature in Spa

May in Spa, Belgium marks a delightful transition into warmer weather, with temperatures showcasing a significant leap from the frigid depths of winter. The month begins with a minimum of -1°C (31°F) and an average temperature of 12°C (55°F), gradually escalating to a pleasant maximum of 30°C (87°F). This notable increase not only highlights the region's awakening from the cold grip of earlier months, but also invites outdoor enthusiasts to revel in the lush landscapes and blooming flora. As the days lengthen, the warmth provides a perfect backdrop for exploring Spa’s renowned wellness offerings, making May an enticing time to visit this beautiful locale.

May Weather in Spa: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Spa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spa, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943485463646457514339
Data source: Temperature data for Spa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Spa

May in Spa, Belgium is characterized by moderate precipitation, with an average of 81 mm (3.2 in) over 15 days. This month sees a notable increase from the dry spells of April, which recorded only 45 mm (1.8 in). The rain in May contributes to the lush greenery that the region is renowned for, although it still falls short of the wetter months such as January and March. As spring transitions into summer, May's rainfall can be seen as a vital component in sustaining the vibrant landscapes while setting the stage for the more humid conditions anticipated in June and July. Overall, May's precipitation creates a balanced climate, perfect for enjoying the natural beauty Spa has to offer.

May Precipitation Trends in Spa

The chart displays monthly precipitation patterns in Spa, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Spa, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec100911084581919783749671139
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Spa

May in Spa, Belgium, marks a notable shift in humidity as it dips to 77%, offering a welcome relief from the higher levels experienced in the earlier months of the year. Following a gradual decrease from 91% in January to 84% in April, May showcases the trend of easing moisture in the air. This transition continues into summer, with June and July further dropping to 74% and 72%, respectively. As the year progresses, the humidity fluctuates, climbing back up to 81% by September and reaching its peak again in the colder months. The month of May stands out as a fresh springtime interlude, inviting both locals and visitors to enjoy the beauty of Spa with slightly drier and more comfortable conditions.

May Average Humidity in Spa

This chart illustrates the average monthly humidity levels in Spa, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Spa is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Spa

As May arrives in Spa, Belgium, the UV Index takes a noticeable leap to a very high level of 8, signaling a shift in sun intensity that should not be taken lightly. With a burn time of just 15 minutes, this month requires vigilance and proper sun protection, especially as the UV Index has escalated significantly from the moderate levels seen in the preceding months. This trend of rising UV levels continues into the summer, where June and July maintain the same intensity. It's clear that May marks the onset of a season where sun safety becomes paramount; therefore, it's essential to stay informed about daily UV conditions. For more detailed insights, check out the Spa UV Index.

Maximum UV Index Levels in Spa for May

The chart shows the monthly maximum UV Index (UVI) for Spa in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Spa typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234588876421
Data source: Spa May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Spa

May in Spa, Belgium shines brightly with 396 hours of sunshine, marking a delightful peak in the spring season. As the year progresses, there's a clear upward trend in sunlight, with the months leading up to May displaying a steady increase from 112 hours in January to a vibrant 346 hours by April. This surge not only enhances the charm of Spa’s natural beauty but also invites both locals and tourists to indulge in outdoor activities. After May, while the sunshine hours remain generous, we see a gradual decline into the summer months, with July reaching its zenith at 407 hours before tapering off. This pattern underscores Spa's enchanting spring and summer, making it an ideal destination for sun-seekers.

Monthly Sunshine Duration in Spa: May Highlighted

The May sunshine duration represents the total number of hours Spa experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec112h199h266h346h396h405h407h382h319h240h183h124h
Data source: Spa May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Spa During May

In Spa, Belgium, the likelihood of sunny weather in May sits at around 30%, showing a slight dip from the increasing trend observed in the preceding months, where April boasts a higher 43% chance of sunshine. This fluctuation suggests that while May is a transition month, bringing some sunshine after a relatively brighter April, it does not consistently maintain that peak. Interestingly, the sun’s chances in May are comparable to those in June and July, both hovering near 31%, indicating a somewhat stable experience of cloud cover leading into summer. Overall, while May may not guarantee endless sunny days, it does offer a refreshing respite from the winter's gloom, preparing visitors for the warmer months ahead.

Percentage of Sunny Days in May in Spa

The chart illustrates the percentage of sunny days in Spa throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Spa experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec7%32%40%43%30%31%32%28%38%28%22%14%
Data source: Spa May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Spa in May

In Spa, Belgium, the progression of daylight throughout the year creates a vibrant tapestry of light that beckons outdoor enthusiasts. Starting with a modest 8 hours in January and gradually increasing, daylight reaches a delightful peak of 15 hours in May. This month serves as a pivotal transition from the gentle warmth of spring towards the full embrace of summer, allowing residents and visitors alike to bask in the golden glow. As summer progresses, daylight remains generous, peaking at 16 hours in June before beginning its descent. By August, the days start to shorten slightly, eventually returning to the rhythmic cycle of 10 hours in October and back to 8 hours by December. This dynamic pattern underscores the inviting charm of Spa's changing seasons, where longer days in spring and summer become a cherished time to explore the lush landscapes.

Average Daylight Hours in Spa for May

The chart illustrates the variation in daylight duration in Spa throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 31m10h 2m11h 55m13h 50m15h 30m16h 22m15h 55m14h 25m12h 34m10h 39m8h 57m8h 2m
Data source: Spa daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Spa

In May, Spa, Belgium experiences an invigorating average wind speed of 4.5 m/s (10 mph), making it a refreshing time to enjoy the outdoors. Compared to the preceding months, the wind picks up slightly from April’s calmer 3.3 m/s, while maintaining similar conditions to both January and October. This trend suggests a transition into the warmer months, where gentle breezes enhance the idyllic charm of the lush landscapes. However, as summer approaches, wind speeds dip in June, hinting at the stillness that often accompanies the season. Overall, May's winds offer a perfect balance, creating a picturesque backdrop for visitors seeking both relaxation and adventure.

Average May Wind Speed in Spa

The chart displays monthly wind speed patterns in Spa, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.74.13.34.5 m/s2.83.43.52.84.53.34.2
Data source: Spa May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Spa Compares to Other Months

Weather in Spa varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Spa, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present stark contrasts in weather, showcasing the transition from winter to late spring. In May, temperatures range from a chilly minimum of -1°C (31°F) to a pleasant average of 12°C (55°F) and can even peak at a warm 30°C (87°F). In contrast, January is markedly colder, with a minimum of -12°C (10°F) and an average of just 2°C (36°F), reaching a maximum of 12°C (54°F). While both months experience precipitation on roughly 15 days, January receives slightly more rainfall at 100 mm (3.9 in) compared to May's 81 mm (3.2 in). Additionally, January's humidity is higher at 91%, creating a colder and more oppressive atmosphere compared to the milder humidity of 77% in May. For more details on January weather, you can refer to Spa weather in January.

The weather in May shows a significant increase in temperatures compared to February, with May experiencing a minimum of -1°C (31°F) and an average of 12°C (55°F), while February has a lower average of 4°C (39°F) and a minimum of -11°C (13°F). Additionally, May can reach a maximum of 30°C (87°F), offering much warmer days than February's peak of 20°C (68°F). While February has slightly more precipitation at 91 mm (3.6 in) over 13 days, May experiences a little less at 81 mm (3.2 in) over 15 days, and February's humidity is higher at 90% compared to May's 77%. For more details on February's weather, check Spa weather in February.

In comparing the weather between May and March, May boasts a significantly warmer climate, with average temperatures rising to 12°C (55°F) compared to March’s cooler 6°C (43°F). While May can reach a maximum temperature of 30°C (87°F), March peaks at 22°C (72°F). Precipitation levels are slightly lower in May at 81 mm (3.2 in) over 15 days, whereas March experiences more rainfall at 108 mm (4.2 in) across 16 days. Furthermore, the humidity is typically lower in May at 77%, compared to March’s higher humidity level of 87%. For more detailed insights into March weather, check out Spa weather in March.

May typically experiences milder temperatures compared to April, with a minimum of -1°C and an average of 12°C, peaking at a maximum of 30°C. In contrast, April sees slightly cooler temperatures, with a minimum of -4°C, an average of 9°C, and a maximum of 26°C. Additionally, May tends to be wetter, accumulating 81 mm of precipitation over 15 days, while April receives only 45 mm over 9 days. Humidity levels are slightly lower in May at 77%, compared to 84% in April, allowing for a more comfortable atmosphere as the month progresses. For more detailed weather statistics, you can visit Spa weather in April.

In May, temperatures can range from a chilly low of -1°C (31°F) to a warm high of 30°C (87°F), averaging around 12°C (55°F). The month tends to be quite humid, with a humidity level of 77% and precipitation occurring over 15 days, totaling 81 mm (3.2 in). In contrast, June brings milder conditions with minimum temperatures rising to 6°C (43°F) and maximum highs reaching up to 33°C (91°F), resulting in an average temperature of 17°C (63°F). Although June sees slightly more precipitation at 91 mm (3.6 in) over 13 days, it has a lower humidity of 74%. For more details on June weather, check out Spa weather in June.

In comparing May and July weather, we notice significant differences in temperature and precipitation. May experiences a broader range, with minimum temperatures dropping to -1°C (31°F) and maximums soaring to 30°C (87°F), while average temperatures hover around 12°C (55°F). In contrast, July starts warmer, with a minimum of 7°C (44°F), an average of 18°C (64°F), and maximums reaching up to 38°C (101°F).

Precipitation levels in May total 81 mm (3.2 in) over 15 days, slightly less than July's 97 mm (3.8 in) spread over 12 days, indicating that while July has more precipitation, it is spread over fewer days. Additionally, humidity levels are slightly higher in May at 77%, compared to July’s 72%. For a closer look at July weather specifics, check out Spa weather in July.

In May, temperatures can range from a chilly low of -1°C (31°F) to a warm high of 30°C (87°F), with an average temperature of 12°C (55°F). The month experiences around 81 mm (3.2 in) of precipitation over about 15 days, resulting in a relatively high humidity level of 77%. In contrast, August brings milder lows of 6°C (42°F) and can reach a maximum of 35°C (95°F), with an average temperature of 18°C (64°F). Precipitation in August is slightly higher at 83 mm (3.3 in) over 16 days, but humidity drops to 71%. For more detailed weather insights specific to August, you can visit Spa weather in August.

May and September present notably different weather patterns. In May, temperatures can range from a chilly -1°C (31°F) to a warm 30°C (87°F), with an average of 12°C (55°F). The month sees around 81 mm (3.2 in) of precipitation over approximately 15 days, contributing to a humidity level of 77%. In contrast, September experiences slightly warmer temperatures with a minimum of 2°C (36°F), an average of 14°C (58°F), and a maximum of 32°C (90°F). Precipitation decreases to 74 mm (2.9 in) over about 10 days, while humidity rises to 81%. For more specific details about September weather, you can visit Spa weather in September.

In May, the weather is characterized by a wider range of temperatures, with minimums dropping to -1°C (31°F) and maximums reaching as high as 30°C (87°F), leading to an average of 12°C (55°F). The month experiences about 81 mm (3.2 in) of precipitation over 15 days, with humidity averaging at 77%. In contrast, October sees milder temperatures, with lows at 1°C (33°F) and highs around 24°C (75°F), averaging 11°C (52°F). Although October has more rainfall—96 mm (3.8 in) also over 15 days—it is accompanied by higher humidity levels, peaking at 88%. For more detailed insights into the October climate, you can check Spa weather in October.

May and November present contrasting weather patterns, highlighting the transition from spring to late autumn. In May, temperatures range from a chilly minimum of -1°C (31°F) to a warm maximum of 30°C (87°F), with an average of 12°C (55°F). This month experiences about 81 mm (3.2 in) of precipitation over 15 days, along with moderate humidity levels at 77%. In contrast, November sees colder temperatures with a minimum of -4°C (24°F) and a maximum of 18°C (64°F), averaging just 6°C (43°F). Although it has slightly less precipitation at 71 mm (2.8 in) over 12 days, it boasts higher humidity at 91%. For a closer look at November weather, you can visit Spa weather in November.

May and December present stark contrasts in weather conditions. In May, temperatures range from a chilly -1°C (31°F) at night to a warm 30°C (87°F) during the day, with an average of 12°C (55°F). The month sees about 81 mm (3.2 in) of precipitation over 15 days, accompanied by a relatively moderate humidity level of 77%. In contrast, December's temperatures are cooler, with minimums dropping to -5°C (23°F) and daytime highs only reaching 14°C (57°F), averaging just 4°C (39°F). The month is wetter, accumulating 139 mm (5.5 in) of rain across 21 days, and higher humidity levels at 92%. For more detailed information, you can check Spa weather in December.

Compare Spa's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Spa

In May, Spa experiences a unique transitional climate, setting it apart from the colder months of early spring. As temperatures rise, days become warmer, averaging a pleasant 12°C (55°F), with peaks reaching up to 30°C (87°F). However, this month is also marked by a notable increase in precipitation, with about 81 mm spread over 15 days, bringing a refreshing humidity level of 77%. This combination of warmth and moisture fosters lush landscapes, making May an ideal time for outdoor relaxation. For a deeper look into how Spa's May weather compares to other times of the year, explore the detailed insights available at Spa Climate.