May Weather in Aachen, Germany

Last updated: February 26, 2025

May in Aachen, Germany, brings a delightful range of weather, with temperatures soaring to a maximum of 31°C (89°F) while enjoying an average of 13°C (56°F). The month can be quite changeable, accommodating everything from pleasant warm days to chilly evenings, with a minimum temperature of 0°C (32°F). Rainfall is frequent, accumulating to 74 mm (2.9 in) over 13 days, which contributes to the lush greenery characteristic of the region. Visitors can expect high humidity levels at 77%, making it a month of varied and vibrant weather, perfect for exploring the charm of Aachen.

May Temperature in Aachen

In May, temperatures in Aachen, Germany, begin to show a remarkable transition from the lingering chill of winter to the warmth of early summer. With a minimum of 0°C (32°F), the month kicks off cool but quickly warms to an average of 13°C (56°F) and peaks at a maximum of 31°C (89°F). This is a significant leap from the colder months, where January temperatures barely reach above freezing. As May progresses, residents and visitors alike can enjoy more pleasant outdoor activities, indicating a burst of vitality and the beauty of blossoming spring as the city gears up for the sunnier days ahead. The increasing temperatures also reflect the general upward trend of warmth that characterizes the late spring season, making it a delightful time to explore Aachen's rich history and vibrant culture.

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

The chart illustrates May temperature patterns in Aachen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec374044495564656559534440
Data source: Temperature data for Aachen 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 Aachen

May in Aachen, Germany presents a delightful blend of springtime warmth and moderate rainfall, with an average precipitation of 74 mm (2.9 in) spread over 13 days. This month marks a noticeable shift from April's drier conditions, where only 40 mm (1.6 in) fell over just 10 days. While May doesn’t boast the highest rainfall totals of the year—those are seen in the summer months like July and June—it does provide a steady rhythm of rain that sustains the lush greenery typical of the region. The precipitation begins to ramp up, setting the stage for the wetter months ahead, yet it remains manageable, allowing for ample opportunities to enjoy the blossoming outdoors. Overall, May's weather reflects a transitional period in Aachen, striking a balance between the lingering chill of spring and the inviting warmth of early summer.

May Precipitation Trends in Aachen

The chart displays monthly precipitation patterns in Aachen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7978874074889478648259112
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Aachen

In May, Aachen, Germany, experiences a notable shift in humidity levels, dropping to a comfortable 77%. This represents a continued decline from the previous months, showcasing a transition from the dampness of winter, where humidity hovers around 91% in January, to more moderate conditions as summer approaches. The trend is clear: as the year progresses, humidity decreases steadily, reaching its annual low of 72% in July before rising again in the fall months. May serves as a pleasant midpoint, offering a refreshing reprieve from the heavier moisture of earlier months, inviting residents and visitors alike to enjoy the blossoming landscape with a bit more ease.

May Average Humidity in Aachen

This chart illustrates the average monthly humidity levels in Aachen, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
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 Aachen

As spring blossoms into May in Aachen, the UV Index escalates to 7, marking a shift to the high exposure category, with a burn time of just 25 minutes. This significant increase from the previous months indicates a growing need for sun protection as the days become sunnier and warmer. Unlike the mild UV levels of January through April, May serves as a reminder to be proactive about skin safety, especially with the summer months fast approaching. With the UV Index set to peak even higher in June and July, residents and visitors alike should stay informed and take necessary precautions. For more detailed insights, check out Aachen UV Index.

Maximum UV Index Levels in Aachen for May

The chart shows the monthly maximum UV Index (UVI) for Aachen 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Aachen 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 Aachen

May brings a radiant burst of sunshine to Aachen, Germany, with 394 hours of glorious daylight, marking the peak of spring's vibrant embrace. This month is the culmination of a steady upward trend, where sunshine hours climb from 119 in January to a remarkable high as nature awakens. By April, residents bask in 341 hours, setting the stage for May’s brilliance. This pattern continues into June, where 395 hours maintain the lovely luminosity, creating a perfect backdrop for outdoor activities and festivities. As the year progresses, the warm embrace of sunlight serves as a joyful reminder of the long, sun-kissed days that characterize this enchanting season in Aachen.

Monthly Sunshine Duration in Aachen: May Highlighted

The May sunshine duration represents the total number of hours Aachen 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.
JanFebMarAprMayJunJulAugSepOctNovDec119h205h269h341h394h395h408h378h316h240h188h133h
Data source: Aachen May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Aachen During May

In Aachen, Germany, May brings a moderate 30% chance of sunny weather, reflecting a noticeable dip from the peak of spring. While the month shows an improvement over the winter months, it lags slightly behind the sunnier days of April and March, which boast chances of 41% and 40%, respectively. As one transitions into summer, June only inches up to 32%, highlighting that May remains a transitional month with variable weather. Given these trends, while you may enjoy a fair share of sun in May, be prepared for the whimsical nature of spring!

Percentage of Sunny Days in May in Aachen

The chart illustrates the percentage of sunny days in Aachen 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 Aachen experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec8%31%40%42%30%32%32%31%38%30%25%14%
Data source: Aachen May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Aachen in May

As spring unfolds into May in Aachen, Germany, the daylight duration reaches a delightful 15 hours, marking a significant increase from the 13 hours in April. This steady ascent from 8 hours in January to 10 hours in February and beyond reflects the rejuvenating transition of the year. By June, the days peak at 16 hours, offering an abundance of sunshine that nourishes both nature and spirits. While daylight begins to gradually wane in July and August, with 15 and 14 hours respectively, the vibrant energy of May stands out as a symbol of warmth and growth, encapsulating the beauty of early summer days. As the seasons shift into autumn, this trend of decreasing daylight serves as a reminder of the cyclical nature of time and the fleeting enchantment of longer days.

Average Daylight Hours in Aachen for May

The chart illustrates the variation in daylight duration in Aachen throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 30m10h 1m11h 55m13h 51m15h 32m16h 24m15h 56m14h 26m12h 34m10h 39m8h 56m8h 1m
Data source: Aachen daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Aachen

In Aachen, Germany, May brings a refreshing breeze with an average wind speed of 4.4 m/s (10 mph), matching the gusty conditions of January and October. This rejuvenating wind contrasts sharply with the quieter April, where speeds dipped to a gentle 3.2 m/s (7 mph). As spring fully unfolds, May's winds invigorate the landscape, making outdoor activities delightful. Following the vibrant month of May, the wind tends to mellow into summer, with average speeds dropping to 2.6 m/s (6 mph) in June, creating a noticeable dip that heralds the calmer days ahead. The cyclical patterns in wind speeds throughout the year highlight a dynamic climate, where May stands out as an invigorating transition, bridging the briskness of spring with the warmer, more tranquil days of summer.

Average May Wind Speed in Aachen

The chart displays monthly wind speed patterns in Aachen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.54.03.24.4 m/s2.63.23.42.84.43.34.1
Data source: Aachen May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Aachen Compares to Other Months

The weather in Aachen changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Aachen and find detailed weather information for every month.

May and January present contrasting weather patterns. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 31°C (89°F) during the day, allowing for a pleasant average of 13°C (56°F). There’s moderate precipitation of 74 mm (2.9 in) over approximately 13 days, with humidity at 77%. Conversely, January brings much colder conditions, with temperatures dipping to a minimum of -8°C (17°F) and peaking at 13°C (56°F), averaging just 3°C (37°F). The month is slightly wetter, with 79 mm (3.1 in) of precipitation spread across 14 days, all while experiencing higher humidity levels at 91%. For more information on January’s weather, check out Aachen weather in January.

In comparing the weather of May and February, significant differences emerge. May typically showcases a broader temperature range with minimums reaching 0°C and maximums soaring to 31°C, resulting in a much warmer average of 13°C compared to February's cooler average of 5°C, which features a minimum temperature of -10°C. Precipitation levels are relatively similar; May receives 74 mm over 13 days, while February has slightly higher precipitation at 78 mm across 12 days. Interestingly, February tends to have higher humidity at 90%, compared to May's 77%. For a detailed insight into February's climate, you can check Aachen weather in February.

When comparing the weather of March and May, notable differences emerge in temperature and precipitation patterns. May experiences a broader temperature range, with minimums around 0°C (32°F) and maximums reaching up to 31°C (89°F), averaging 13°C (56°F). In contrast, March is cooler, with temperatures ranging from -10°C (14°F) to a maximum of 23°C (73°F), averaging just 7°C (44°F). In terms of precipitation, May has slightly less with 74 mm (2.9 in) over 13 days, while March sees more rainfall at 87 mm (3.4 in) across 15 days. Humidity levels also differ, with March being slightly more humid at 87%, compared to May's 77%. For more detailed information, you can check Aachen weather in March.

Comparing the weather between April and May reveals some notable differences. In May, the temperatures range from a chilly minimum of 0°C (32°F) to a high of 31°C (89°F), with an average of 13°C (56°F), indicating a significant warming trend as the month progresses. In contrast, April's temperatures are cooler, with a minimum of -3°C (26°F) and a maximum of 27°C (81°F), resulting in a lower average of 9°C (49°F).

Additionally, May experiences more precipitation, totaling 74 mm (2.9 in) over 13 days, compared to April's 40 mm (1.6 in) over 10 days. Humidity levels are slightly lower in May at 77%, while April sees a higher average humidity of 84%. For more detailed insights into April's climate, you can check Aachen weather in April.

In May, temperatures range from a chilly low of 0°C (32°F) to a pleasant high of 31°C (89°F), with an average of 13°C (56°F). The month experiences about 74 mm (2.9 in) of precipitation over 13 days, coupled with a relatively high humidity level of 77%. In contrast, June offers warmer conditions, with minimum temperatures starting at 7°C (44°F) and reaching a maximum of 33°C (92°F), averaging 18°C (64°F). Precipitation increases slightly to 88 mm (3.4 in) across 12 days, while humidity slightly decreases to 74%. For more specific details, you can check out Aachen weather in June.

In comparing the weather in May and July, we see notable differences in temperature and precipitation patterns. May experiences a wider range of temperatures, with a minimum of 0°C (32°F) and a maximum of 31°C (89°F), leading to an average of 13°C (56°F). In contrast, July presents a generally warmer climate, starting from a minimum of 8°C (46°F) and reaching up to 40°C (104°F), with an average temperature of 19°C (66°F).

Precipitation levels are slightly higher in July at 94 mm (3.7 in), compared to May's 74 mm (2.9 in). Both months feature about 13 days of precipitation, although July's humidity is slightly lower at 72%, compared to May's 77%. For more detailed insights, check out this link: Aachen weather in July.

May and August present a notable contrast in weather conditions. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 31°C (89°F) during the day, with an average of 13°C (56°F). This month also experiences significant humidity at 77%, alongside 74 mm (2.9 in) of precipitation over about 13 days. In contrast, August sees a milder minimum temperature of 7°C (45°F) and a higher average of 19°C (66°F), peaking at 35°C (96°F). With slightly more precipitation at 78 mm (3.1 in) across 16 days, August maintains a lower humidity level of 71%. For more detailed insights, check out this link: Aachen weather in August.

May and September both showcase a range of temperatures, but they exhibit distinct characteristics. In May, temperatures range from a chilly 0°C (32°F) to a warm 31°C (89°F), with an average of 13°C (56°F). This month receives about 74 mm (2.9 in) of precipitation over 13 days, maintaining a humidity level of 77%. In contrast, September offers slightly milder temperatures, with a minimum of 2°C (36°F), an average of 15°C (59°F), and a maximum reaching up to 32°C (91°F). It has less precipitation at 64 mm (2.5 in) over 10 days, but the humidity increases to 81%. For a more detailed look at September's weather, you can check out Aachen weather in September.

May and October present distinct weather patterns, each with its own character. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 31°C (89°F) during the day, with an average of 13°C (56°F). This month experiences around 74 mm (2.9 in) of precipitation over approximately 13 days, accompanied by a humidity level of 77%. Conversely, October is cooler, with temperatures varying from 1°C (34°F) to a maximum of 25°C (78°F) and an average of 11°C (53°F). Precipitation increases slightly to 82 mm (3.2 in) over about 14 days, and humidity rises to 88%. For more detailed insights about October weather, visit Aachen weather in October.

May and November exhibit quite different weather characteristics. In May, temperatures range from a pleasant 0°C (32°F) at night to a warm 31°C (89°F) during the day, averaging around 13°C (56°F). The month experiences moderate precipitation with about 74 mm (2.9 in) over 13 days, and humidity levels hover around 77%. In contrast, November sees cooler temperatures, starting from a chilly -5°C (24°F) and reaching a maximum of 18°C (66°F), averaging just 7°C (44°F). Precipitation is slightly lower at 59 mm (2.3 in) over 11 days, but humidity increases to 91%. For more detailed information on November's weather, you can visit Aachen weather in November.

May and December present stark contrasts in weather patterns. In May, temperatures range from a refreshing 0°C (32°F) at night to a warm peak of 31°C (89°F) during the day, with an average of 13°C (56°F). This month experiences about 74 mm (2.9 in) of precipitation over approximately 13 days, coupled with a humidity level of 77%. Conversely, December brings colder temperatures, with lows dipping to -5°C (24°F) and an average of only 5°C (41°F). The maximum temperature in December reaches a modest 15°C (59°F) and is typically wetter, with 112 mm (4.4 in) of rain spread over 20 days, resulting in a higher humidity level of 92%. For more detailed insights into winter conditions, check out Aachen weather in December.

Compare Aachen's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Aachen

As May unfolds in Aachen, the weather offers a delightful departure from the chill of earlier months. With temperatures reaching a maximum of 31°C and averaging around a pleasant 13°C, this month marks a significant warming trend that invites outdoor activities. Although May experiences approximately 13 days of rainfall totaling 74 mm, the humidity at 77% keeps the air refreshingly crisp. Compared to preceding months, May's weather is a vibrant tapestry of warmth and occasional showers, making it an ideal time to explore the beauty of the season. For a deeper dive into what to expect throughout the year, check out our full guide on Aachen Climate.