August Weather in Spa, Belgium

Last updated: August 21, 2025

In August, Spa, Belgium experiences a unique climate blend characterized by temperatures ranging from a maximum of 35°C (95°F) to a cool minimum of 6°C (42°F), with an average of 18°C (64°F). Despite the warm highs, humidity levels hover around 71%, contributing to a muggy feel during hotter days. Visitors can expect moderate rainfall throughout the month, with an average precipitation amount of 83 mm (3.3 in) spread over approximately 16 days. This combination of warmth and occasional showers creates an inviting yet dynamic atmosphere, perfect for outdoor activities and relaxation.

August Temperature in Spa

In August, Spa, Belgium, experiences a delightful warmth that peaks with maximum temperatures reaching 35°C (95°F), making it one of the hottest months of the year. With an average temperature of 18°C (64°F) and a minimum of 6°C (42°F), the month provides a pleasant balance between warmth and coolness, ideal for exploring the area’s renowned thermal spas and lush surroundings. This trend of rising temperatures from previous months highlights a comfortable summer climate, inviting both locals and tourists to savor the outdoor activities. As July and August are the peak of summer, the region enjoys long, sunny days, creating a vibrant atmosphere perfect for relaxation and recreation before the cooler days of September set in.

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

The chart illustrates August 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, August 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.

August Precipitation in Spa

August in Spa, Belgium experiences a noteworthy blend of precipitation, with an average of 83 mm (3.3 in) spread across 16 rainy days. This moderate rainfall marks a slight decrease from the summer peak in July but still reflects the region's characteristic humid climate. As the month transitions into autumn, the consistent rainfall continues to contribute to the lush greenery that Spa is famous for. Notably, the precipitation trend, when observed monthly, reveals that while August maintains a balanced level of rainfall, it serves as a bridge, with moisture levels dipping in September to 74 mm (2.9 in), hinting at the impending cooler months ahead. The steady rhythm of rain not only nourishes the picturesque landscapes but also keeps the local thermal springs flowing, ensuring Spa remains a serene destination year-round.

August Precipitation Trends in Spa

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

In August, Spa, Belgium experiences a significant shift in humidity levels, with an average of 71%, representing a gradual decline from the peak of 91% in January. This steady decrease throughout the summer months—dropping from 72% in July—indicates a warming trend that brings a sense of ease to the typically lush and verdant landscape. As autumn approaches, humidity levels begin to rise again, evidenced by an increase to 81% in September. The city's modest summer humidity not only enhances outdoor experiences but also showcases Spa's unique climate—which oscillates between refreshing dampness and drier spells—creating a delightful contrast that captures the essence of the seasons.

August Average Humidity in Spa

This chart illustrates the average monthly humidity levels in Spa, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Spa

In August, Spa, Belgium experiences a UV Index of 7, falling into the high exposure category, with a burn time of just 25 minutes. This marks a slight decline from the intense UV Index of 8 observed in the preceding summer months of May, June, and July, where sun protection was critical due to the very high levels of UV radiation. As summer transitions toward autumn, the UV Index typically begins to decrease, reminding residents and visitors alike that while August still demands vigilance, the urgency to seek shade and cover is slightly less than in peak summer months. For more detailed insights on UV exposure, you can visit Spa UV Index.

Maximum UV Index Levels in Spa for August

The chart shows the monthly maximum UV Index (UVI) for Spa in August, 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 August, the maximum UV index in Spa typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234588876421
Data source: Spa August 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.

August Sunshine in Spa

August in Spa, Belgium, is a delightful retreat marked by an impressive 382 hours of sunshine. As summer reaches its peak, the sunny days reflect a clear upward trend from the cold of January’s 112 hours to the vibrant warmth of late summer. This rising pattern emphasizes the region's transition from the crispness of winter, through blooming spring, to the sunny splendor of summer months like July, where it peaks at 407 hours. Though August sees a slight dip in sunshine compared to its predecessor, it still retains a wealth of bright days, bridging the gap to a cooler September with 319 hours of sunlight. Such fluctuations not only reveal the changing seasons but also invite visitors to savor the beauty of nature bathed in late summer light.

Monthly Sunshine Duration in Spa: August Highlighted

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

Chance of Sun in Spa During August

In Spa, Belgium, the likelihood of sunny weather tends to fluctuate throughout the year, with August showing a 28% chance of sunshine. This places it slightly below the peak months of spring and early summer, where the probability of sun reaches over 39% in March and 43% in April. Interestingly, as summer rolls on, the chances dip in July and August, suggesting a subtle transition into the more unpredictable weather of early autumn. While August still offers a fair opportunity for sunny days, it’s clear that the vibrant month of April outshines it, setting the stage for Spa's seasonal weather patterns. So, if you're planning a visit, don’t forget to bring an umbrella—just in case!

Percentage of Sunny Days in August in Spa

The chart illustrates the percentage of sunny days in Spa throughout the year, with August 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 August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Spa in August

In Spa, Belgium, the month of August brings a delightful transition with approximately 14 hours of daylight, a comforting contrast to the shorter days of winter. Following the peak of June, where daylight reaches its maximum at 16 hours, August marks a gradual tapering as the summer begins to wane. This gentle decline in daylight continues into September, settling at 12 hours, while the earlier months of the year, like January and December, offer only about 8 hours of light. The progression from the sprawling brightness of summer to the cozier, shorter days of fall reflects the beautiful cycle of seasons, making August a perfect month for outdoor activities while the days remain generously long.

Average Daylight Hours in Spa for August

The chart illustrates the variation in daylight duration in Spa throughout the year, with August 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.

August Winds in Spa

In August, the wind in Spa, Belgium carries a gentle breeze with an average speed of 3.5 m/s (8 mph), slightly increasing from the quieter days of June and September. This month reflects a transitional moment in the annual wind cycle, as summer begins to wane. Notably, the year begins with stronger winds in January and February, which reach peaks of 4.4 m/s and 4.7 m/s, creating a contrast with the milder summer months. As we progress into autumn, wind speeds again pick up in October, signaling the dynamic shifts in weather patterns characteristic of the region. The overall trend shows a dip in wind intensity during mid-year, followed by a potential revival as the seasons change, making August a serene yet strategic time for outdoor activities amidst nature's whispers.

Average August Wind Speed in Spa

The chart displays monthly wind speed patterns in Spa, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.74.13.34.52.83.43.5 m/s2.84.53.34.2
Data source: Spa August wind data, generated using information from the Copernicus Climate Change Service.

How August 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 August’s weather to other months in Spa, focusing on differences in temperature, rainfall, humidity, and UV levels.

August and January showcase a stark contrast in weather conditions. In August, the temperatures range from a refreshing minimum of 6°C (42°F) to a warm maximum of 35°C (95°F), averaging at a comfortable 18°C (64°F). The month experiences moderate rainfall of 83 mm (3.3 in) over 16 days, combined with a humidity level of 71%, creating a humid atmosphere. Conversely, January is marked by much colder temperatures, with a minimum of -12°C (10°F) and a maximum of 12°C (54°F), averaging just 2°C (36°F). While it receives slightly more precipitation at 100 mm (3.9 in) over 15 days, the higher humidity of 91% adds to the chilly feel of the winter month. For more insights on January weather, you can visit Spa weather in January.

August and February present strikingly different weather conditions. In August, temperatures range from a minimum of 6°C (42°F) to a maximum of 35°C (95°F), averaging around 18°C (64°F). This month tends to be relatively humid with an average of 71% and experiences significant precipitation totaling 83 mm (3.3 in) over 16 days. In contrast, February is much colder, with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 20°C (68°F), averaging just 4°C (39°F). The winter month sees a slightly higher precipitation level of 91 mm (3.6 in) over 13 days, along with an even higher humidity of 90%. For more insights into February's climate, check Spa weather in February.

When comparing the weather in August and March, it's clear that these months present strikingly different climates. August features a much warmer temperature range, with minimums of 6°C (42°F) and maximums reaching up to 35°C (95°F), leading to an average temperature of 18°C (64°F). In contrast, March starts off with a chilly minimum of -12°C (10°F) and an average of 6°C (43°F), peaking at a comfortable 22°C (72°F).

While August has lower humidity at 71% and experiences 16 days of precipitation, March sees higher humidity levels of 87% and receives more rainfall, totaling 108 mm (4.2 in) over the same number of days. For those interested in exploring the specific weather conditions during March, Spa weather in March provides detailed insights.

In comparing the weather between April and August, notable differences emerge in temperature, precipitation, and humidity. April experiences cooler conditions, with average temperatures ranging from a low of -4°C (24°F) to a maximum of 26°C (79°F), while August sees a wider range, with daily averages from 6°C (42°F) up to 35°C (95°F). When it comes to rainfall, August has a higher total of 83 mm (3.3 in) over 16 days compared to April's 45 mm (1.8 in) over just 9 days. Interestingly, April also boasts higher humidity levels at 84%, while August's humidity averages around 71%. For more detailed insights into April’s weather, you can visit Spa weather in April.

August and May present distinct weather patterns. In August, temperatures range from a cool 6°C (42°F) to a sizzling 35°C (95°F), with an average of 18°C (64°F), while May enjoys milder temperatures that fluctuate between -1°C (31°F) and 30°C (87°F), averaging around 12°C (55°F). Precipitation is quite similar in both months, with August receiving about 83 mm (3.3 in) over 16 days and May slightly less at 81 mm (3.2 in) over 15 days. Humidity levels in August sit at 71%, compared to the higher 77% in May, making May feel a bit more humid despite the slightly lower average temperatures. For more specific insights about the weather during May, you can visit Spa weather in May.

In comparing the weather in August and June, we see that both months experience a range of temperatures, with minimums around 6°C (42°F) and 6°C (43°F), respectively. August tends to be slightly warmer, with average temperatures reaching 18°C (64°F) and a maximum of 35°C (95°F), compared to June's average of 17°C (63°F) and maximum of 33°C (91°F). Precipitation levels are relatively close, with August receiving 83 mm (3.3 in) over 16 days and June slightly wetter at 91 mm (3.6 in) over 13 days. Humidity is also fairly similar, at 71% in August and 74% in June. For more detailed insights into June weather specifics, you can refer to Spa weather in June.

In comparing the weather of August to July, we see some notable differences. August features slightly cooler minimum temperatures, with a low of 6°C (42°F) compared to July’s 7°C (44°F). The average temperature remains the same at 18°C (64°F) for both months, but August experiences a maximum temperature of 35°C (95°F), which is a bit lower than July's peak of 38°C (101°F). Rainfall is also a consideration, as August sees 83 mm (3.3 in) of precipitation over 16 days, with July having 97 mm (3.8 in) over 12 days. Humidity levels are quite similar, with August at 71% and July at 72%. For more detailed insights into July's weather, you can check Spa weather in July.

August typically showcases warmer weather compared to September, with average temperatures reaching 18°C (64°F) and maximums soaring up to 35°C (95°F). In contrast, September's temperatures dip slightly, averaging 14°C (58°F) with maximums around 32°C (90°F). Both months experience notable humidity, yet September tends to be a bit more humid at 81% compared to August’s 71%. Precipitation is also slightly less in September, totaling 74 mm (2.9 in) over 10 days, compared to August's 83 mm (3.3 in) over 16 days. For more detailed weather information, check out Spa weather in September.

August tends to bring warmer days with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 35°C (95°F), and an average of 18°C (64°F). This summer month also experiences considerable humidity at 71% and precipitation totaling 83 mm (3.3 in) over about 16 days. In contrast, October ushers in cooler conditions, with temperatures dropping to a minimum of 1°C (33°F) and an average temperature of 11°C (52°F), peaking at 24°C (75°F). The month sees slightly more rainfall, with a total of 96 mm (3.8 in) spread across around 15 days, while humidity levels rise to 88%. For a detailed look at October's weather, you can check out Spa weather in October.

August and November present contrasting weather conditions. In August, temperatures range from a minimum of 6°C (42°F) to a scorching maximum of 35°C (95°F), with an average of 18°C (64°F). The month typically experiences 83 mm (3.3 in) of precipitation over 16 days, coupled with a humidity level of 71%, adding to the warmth of summer. In sharp contrast, November sees a significant drop in temperature, with a minimum of -4°C (24°F) and an average of only 6°C (43°F). While the maximum temperature reaches a mild 18°C (64°F), November has lower precipitation levels at 71 mm (2.8 in) over 12 days, but the humidity rises to 91%, creating a cold and damp atmosphere. For more detailed insights, you can visit Spa weather in November.

In August, the weather is characterized by warm temperatures, with a minimum of 6°C (42°F) and a maximum reaching up to 35°C (95°F), providing an average of 18°C (64°F). The month sees about 83 mm (3.3 in) of precipitation over approximately 16 days, with humidity levels at 71%, creating a generally humid but warm atmosphere. In contrast, December brings a significant drop in temperature, with lows of -5°C (23°F) and highs of only 14°C (57°F), averaging around 4°C (39°F). This winter month is wetter, receiving 139 mm (5.5 in) of precipitation over 21 days, and experiences even higher humidity at 92%. For more specific information about the weather in December, visit Spa weather in December.

Compare Spa's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Spa

As summer winds down in Spa, August brings a delightful blend of warmth and humidity, with temperatures often reaching a pleasant peak while still allowing for cool evenings. This month typically sees more rain than its predecessors, resulting in lush landscapes. With an average of 16 precipitation days, outdoor activities might be occasionally interrupted, but the refreshing weather makes it ideal for exploring Spa's stunning surroundings. For those looking to understand how August compares with other months, check out the detailed information available at Spa Climate.