Last updated: August 27, 2025
May in Haarlem, Netherlands reveals a delightful mix of spring warmth and frequent showers. With maximum temperatures reaching 27°C (81°F), the month offers a pleasant average of 12°C (55°F), though it can dip as low as 4°C (40°F) during cooler nights. The city experiences about 54 mm (2.1 in) of precipitation spread over 11 days, resulting in a humidity level of 84%, which enhances the lushness of the surrounding landscapes. Visitors and locals alike can enjoy blooming flora and vibrant outdoor activities, while being prepared for occasional rain.
In Haarlem, Netherlands, May marks a delightful transition into warmer weather, with temperatures reflecting the vibrant bloom of spring. The month begins with minimums around 4°C (40°F), gradually rising to a pleasant average of 12°C (55°F), and peaking at a comfortable 27°C (81°F). This upward trend indicates not only longer days but also an energizing atmosphere, perfect for enjoying the city's parks and outdoor cafes. As the chilly grip of winter loosens its hold, May welcomes an invigorating warmth that beckons both locals and visitors to revel in the beauty of Haarlem's blossoming landscapes.
In May, Haarlem experiences a moderate change in precipitation, with 54 mm (2.1 in) of rainfall spread over approximately 11 days. This marks a slight increase from the drier month of April, which recorded only 43 mm (1.7 in). As spring unfolds, the weather becomes more variable, laying the groundwork for the wetter summer months ahead. Notably, June and July see significant rainfall peaks, reaching 74 mm (2.9 in) and 73 mm (2.9 in) respectively, suggesting a trend toward increased precipitation as the season progresses. Overall, May serves as a transitional month, hinting at the lush greenery and vibrant landscapes that will soon envelop Haarlem as temperatures rise and rainfall becomes more frequent.
May in Haarlem, Netherlands, typically offers a refreshing drop in humidity at 84%, a slight decline from the preceding months. This gradual easing—following the year’s high levels of 87% in January and February—signals the onset of more comfortable conditions as spring unfolds. The trend shows a consistent decrease throughout May, leading into the summer months where humidity further diminishes to 81% by June. This shift not only enhances outdoor experiences but also marks the transition from the wetter chill of early year to the more temperate climate of late spring, making Haarlem an inviting destination for those seeking to enjoy the blooming landscape.
As the warmth of May arrives in Haarlem, the UV Index sharply increases to 7, marking a shift to a high exposure category. This elevation signals that residents and visitors should be more cautious, as the burn time decreases to just 25 minutes. Compared to the earlier months of the year, where January and February have a mere UV Index of 1 and 2, the growing intensity underscores the importance of sun protection. As the season progresses, this trend not only highlights the approaching summer months but also serves as a reminder that taking care of your skin becomes increasingly crucial. For detailed information on daily variations, visit Haarlem UV Index.
UV Risk Categories
As May unfolds in Haarlem, the city basks in a delightful 412 hours of sunlight, making it one of the sunniest months of the year. This spectacular start to summer builds upon a steady upward trend in daylight hours, beginning with a modest 114 hours in January and blossoming to 361 hours by April. The sunlit days in May not only welcome warmer weather but also signify the peak of brightness that continues into the vibrant months ahead, with June and July offering 411 and 423 hours respectively. As the days gradually shorten post-summer, it’s clear that May serves as a radiant bridge between spring and summer, inviting both locals and visitors to immerse themselves in the lush beauty of Haarlem.
As spring blossoms into May, the likelihood of sunny weather in Haarlem sees a slight dip, with a 35% chance of sunshine illuminating the month. After steadily increasing from a mere 20% in January to 41% in April, May reflects a transitional phase where sun-filled days become somewhat more elusive. Following the vibrant spring, the chances of sunnier skies rise again in June to 40%, suggesting that while May may be a bit unpredictable, summer isn't far behind. This fluctuating pattern paints a picture of Haarlem's weather as a blend of the lingering freshness of spring and the onset of the warmer, sun-drenched days ahead.
In Haarlem, Netherlands, the progression of daylight duration throughout the year paints a vivid picture of seasonal change. Starting with a modest 8 hours in January, sunlight gradually increases, culminating in a delightful 15 hours by May. This month marks a significant leap, where residents bask in nearly double the daylight compared to the start of the year. As summer unfolds, June and July offer the peak at 16 hours of sunlight, creating the perfect backdrop for outdoor activities and long, leisurely evenings. However, as August rolls in, a gentle decline begins, reminding us that even the brightest days must give way to the shorter spells of autumn. By September, daylight dwindles to 12 hours, eventually tapering back to 8 hours in November and 7 hours in December. This rhythmic ebb and flow of daylight not only enhances the charm of Haarlem's seasons but also invites locals and visitors alike to celebrate each fleeting moment of sunshine.
In Haarlem, the wind in May tends to gently breech the spring warmth, showcasing an average speed of 5.1 m/s (11 mph). This slight decrease from April's 5.3 m/s marks the trend of diminishing wind speeds as the season progresses toward summer. While the winds remain mild, they provide a refreshing counterbalance to the rising temperatures, fostering a vibrant outdoor atmosphere. As summer approaches in June, winds dip even further to 3.9 m/s, highlighting a soothing shift that characterizes the early summer months. This subtle transition reflects a broader annual pattern in Haarlem, where winter months boast the briskest winds and warm summer days offer a calmer breeze, inviting residents and visitors alike to indulge in the beauty of the season.
Weather in Haarlem varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Haarlem, focusing on differences in temperature, rainfall, humidity, and UV levels.
In May, the weather is generally milder and more pleasant, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F) and an average of 12°C (55°F). The month experiences around 54 mm (2.1 in) of precipitation over 11 days, coupled with a relative humidity of 84%. In contrast, January is significantly colder, with temperatures varying from -4°C (26°F) to 12°C (55°F) and an average of 5°C (42°F). It sees slightly higher precipitation, totaling 62 mm (2.4 in) spread across 13 days, along with a humidity level of 87%. For more details on the January weather, visit Haarlem weather in January.
When comparing the weather in May and February, we see a significant shift in temperature and overall conditions. May experiences milder temperatures, with averages around 12°C (55°F) and maximums reaching 27°C (81°F), while February is much colder, averaging 5°C (42°F) and peaking at 16°C (61°F). Additionally, May has a lower precipitation level of 54 mm (2.1 in) spread over 11 days, compared to February's 71 mm (2.8 in) over 12 days. Humidity levels are relatively high in both months—84% in May and 87% in February—contributing to a slightly heavier feel in the latter. For more details on February’s specific weather patterns, check out Haarlem weather in February.
In comparing the weather of May and March, it's clear that May is significantly warmer, with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), while March sees much cooler conditions with temperatures fluctuating between -7°C (19°F) and 17°C (63°F). May experiences less precipitation overall, with 54 mm (2.1 in) falling over 11 days, whereas March has greater rainfall at 71 mm (2.8 in) over 14 days. Additionally, humidity levels are slightly higher in March at 86%, compared to May’s 84%. For more detailed information, you can check Haarlem weather in March.
In comparing the weather between April and May, we see a notable increase in temperatures. April experiences a minimum of 1°C (34°F) and an average of 9°C (49°F), while May starts at a warmer minimum of 4°C (40°F) and averages 12°C (55°F). Although both months have a similar maximum temperature, reaching 25°C (77°F) in April and 27°C (81°F) in May, May brings slightly more precipitation with 54 mm (2.1 in) over 11 days compared to April's 43 mm (1.7 in) over 10 days. Humidity remains high in both months, with April at 85% and May slightly lower at 84%. For more detailed information, visit Haarlem weather in April.
In comparing the weather of May and June, we see a noticeable warming trend. May experiences a wide temperature range, with minimums around 4°C (40°F) and maximums reaching 27°C (81°F), resulting in an average temperature of 12°C (55°F). Precipitation in May totals 54 mm (2.1 in) over 11 days, and while humidity is relatively high at 84%, the overall climate remains mild.
In contrast, June boasts a warmer minimum temperature of 9°C (48°F) and can see maximums climb to 30°C (86°F), yielding an average temperature of 17°C (62°F). However, June also sees an increase in precipitation, totaling 74 mm (2.9 in) over the same 11 days, accompanied by slightly lower humidity at 81%. For further details on June weather, you can check Haarlem weather in June.
In comparing the weather between May and July, May experiences cooler temperatures, with a minimum of 4°C (40°F) and an average of 12°C (55°F), while July sees warmer conditions, with a minimum of 11°C (52°F) and an average of 18°C (64°F). During July, maximum temperatures can reach up to 33°C (92°F), significantly higher than May's maximum of 27°C (81°F). Precipitation in July also increases, totaling 73 mm (2.9 in) over 14 days compared to May's 54 mm (2.1 in) over 11 days, though humidity remains relatively similar, with July at 80% and May at 84%. For a more detailed look at July's climate specifics, visit Haarlem weather in July.
May and August showcase distinct weather patterns, with May offering a cooler climate characterized by a minimum temperature of 4°C (40°F) and an average of 12°C (55°F). The month experiences a moderate amount of rainfall, totaling 54 mm (2.1 in) over 11 days and a higher humidity level of 84%. In contrast, August brings warmer temperatures, with a minimum of 11°C (52°F) and an average of 18°C (65°F), peaking at 30°C (87°F). This month sees significantly more rainfall, accumulating to 99 mm (3.9 in) across 15 days, but with a slightly lower humidity of 78%. For more details about the weather trends in August, you can refer to Haarlem weather in August.
In May, temperatures range from a cool 4°C (40°F) at night to a comfortable 27°C (81°F) during the day, with an average temperature of around 12°C (55°F). The month experiences about 54 mm (2.1 in) of precipitation over 11 days, coupled with high humidity at 84%. In contrast, September sees a slight increase in minimum temperatures to 7°C (45°F) and a higher average of 16°C (60°F), while daytime highs remain the same at 27°C (81°F). However, it has higher precipitation levels of 93 mm (3.7 in) spread over 12 days and slightly lower humidity at 83%. For a deeper look at the conditions you can expect, check out Haarlem weather in September.
When comparing the weather in May and October, both months start with similar minimum temperatures around 4°C (40°F). However, May tends to be warmer overall, with an average temperature of 12°C (55°F) and a maximum of 27°C (81°F). In contrast, October's average temperature is slightly higher at 13°C (55°F), but it has a cooler maximum of 23°C (74°F). Precipitation also differs significantly, with May experiencing 54 mm (2.1 in) of rain over 11 days, while October sees much more rainfall at 115 mm (4.5 in) across 17 days. Humidity levels are comparably high in both months, with May at 84% and October at 86%. For more detailed information, you can check out Haarlem weather in October.
May and November present contrasting weather patterns, reflecting the transition from spring to late autumn. In May, temperatures range from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), with an average of 12°C (55°F). The month experiences around 54 mm (2.1 in) of precipitation over 11 days, accompanied by relatively high humidity at 84%. In comparison, November sees cooler temperatures, with a minimum of 0°C (33°F), an average of 9°C (48°F), and a maximum of 17°C (63°F). Precipitation increases to 65 mm (2.6 in) over 15 days, while humidity rises slightly to 87%. For more specific insights into the weather during this month, you can explore Haarlem weather in November.
May and December present stark contrasts in weather patterns. In May, temperatures are generally milder, with a range from a chilly 4°C (40°F) at night to a warm 27°C (81°F) during the day, averaging around 12°C (55°F). Precipitation is moderate at 54 mm (2.1 in) over about 11 days, while humidity sits at 84%.
In contrast, December experiences colder temperatures, dropping to a minimum of -3°C (27°F) and peaking at 13°C (55°F), with an average of 6°C (44°F). This month is significantly wetter, receiving 105 mm (4.1 in) of precipitation over 18 days, accompanied by a similar humidity level of 86%. For more insights on winter conditions, check Haarlem weather in December.
As spring fully blossoms in May, Haarlem experiences a delightful shift in weather that sets it apart from the preceding months. The average temperature rises significantly, offering more warmth with daytime highs often touching a pleasant 27°C, contrasting the cooler early spring temperatures. While the humidity reaches a noticeable 84%, making the air feel rich and vibrant, the frequent showers—11 days of rain with a total of 54 mm—serve to keep the landscape lush and green. This blend of warming sunshine and refreshing rain creates an inviting atmosphere, making May an ideal time to explore the city’s parks and blooming gardens. For a deeper dive into Haarlem's climate patterns, check out Haarlem Climate.