Last updated: March 17, 2025
May in Reykjavik, Iceland presents a fascinating blend of springtime charm and unpredictable weather. With a maximum temperature reaching 15°C (60°F) and a cool average of 7°C (44°F), the month offers a refreshing respite from winter's chill, although it's not uncommon for temperatures to dip as low as -3°C (27°F). Rainfall is a notable aspect of May, with 113 mm (4.4 in) of precipitation over approximately 18 days, contributing to the region's lush landscapes. Coupled with high humidity levels of 85%, May serves as a vivid reminder of Iceland's dynamic climate, inviting visitors to experience both its captivating beauty and varied weather patterns.
In May, Reykjavik begins to shake off the chill of winter, welcoming more moderate temperatures as spring unfolds. With minimums around -3°C (27°F) and maximums reaching up to 15°C (60°F), the city enjoys an average temperature of 7°C (44°F), marking a notable transition from the previous months. This upward trend not only invites locals and visitors alike to explore the vibrant streets but also sets the stage for the warmth of summer right around the corner. As daylight lengthens, May offers a refreshing glimpse of nature’s awakening, making it an ideal time to experience the stunning landscapes and unique charm of Iceland's capital.
In Reykjavik, May continues the trend of spring precipitation with 113 mm (4.4 in) of rainfall, mirroring the amounts of January and the previous month of April. Like those months, May experiences 18 days of rain, keeping the rather damp pattern consistent as residents transition from the chilly depths of winter to the milder embrace of summer. The precipitation levels reflect a gradual decrease as June approaches, which typically brings 92 mm (3.6 in), hinting at the drier conditions of early summer. This trend of fluctuating yet significant rainfall is characteristic of Reykjavik's climate, allowing for the lush landscapes that thrive under Iceland’s unique weather conditions.
In May, Reykjavik experiences a notable shift in humidity, dropping to 85%, a marked decrease from the earlier months of the year. This trend signifies the gradual transition into summer, where humidity levels begin to ease compared to the winter peaks of 96% in January and 95% in February. As spring unfolds, the air becomes slightly drier, preparing residents and visitors alike for the milder weather that follows in June. Despite this reduction, the humidity in May remains relatively high compared to later summer months, such as July and August, which see levels rise again but still fall below the winter averages. Overall, May represents a breath of fresh air, heralding the beauty of summer while still tethered to Reykjavik's maritime climate.
In May, Reykjavik experiences a noticeable rise in UV exposure, with the UV Index reaching 5—indicative of moderate exposure risk. This marks a shift from the previous months, where the index ranged from 1 to 3, reflecting low to moderate risk levels. As spring unfolds, residents and visitors should be mindful of the 30-minute burn time, a significant decrease compared to earlier months, signaling that protective measures against UV radiation become increasingly important. With June just around the corner bringing even higher UV readings, it's wise to stay informed about daily conditions by checking resources like the Reykjavik UV Index.
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As spring transitions into summer in Reykjavik, May emerges as a sun-drenched delight, boasting 337 hours of sunshine. This striking increase from the preceding months is noteworthy, as it marks a significant leap from 211 hours in April and heralds the longest daylight days of the year. With sunshine steadily increasing from a mere 32 hours in January, the gradual ascent through winter and spring showcases nature’s refreshing transformation. Following May, the sunshine remains generous in June and July, though slightly diminishes, indicating the peak of the luminous season is found in late spring. This growing trend towards abundant daylight not only invigorates the city but also invites locals and visitors alike to bask in the warmth of Icelandic sunshine.
As spring settles in, May emerges as a beacon of hope for those longing for sunny days in Reykjavik, Iceland. With a 46% chance of sunshine, this month marks a significant leap from earlier spring months like March and April, which see much lower probabilities at 14% and 25%, respectively. After the darker winter months, the shift in weather towards the end of spring indicates a promising trend, providing locals and visitors alike with a much-anticipated taste of sun. However, the fleeting nature of summer in Iceland becomes evident as the likelihood of sunshine dramatically dips in the following months, with June and July offering just 15% and 10% chances, respectively. Thus, May stands out as a prime time to embrace the outdoors before the cloudy skies of summer set in.
As spring transitions into summer in Reykjavik, May marks a noticeable leap in daylight, offering an impressive 18 hours of sunshine, a sharp increase from the 15 hours in April. This upward trend in daylight hours reflects the vibrant awakening of nature, providing ample opportunities for outdoor activities and exploration. Interestingly, as the seasons continue, June reaches a peak with 20 hours of daylight, while July maintains a generous 19 hours. The gradual tapering begins in August, showcasing 16 hours, and further dwindles toward winter, ultimately casting long shadows during the darker months of November and December. Reykjavik's daylight variation across the year not only highlights the dramatic seasonal shifts but also invites both locals and visitors to embrace the fleeting beauty of its extended summer days.
As the spring awakens in Reykjavik, May ushers in a noticeable shift in wind patterns, with average speeds dipping to a gentle 3.4 m/s (8 mph). This mild breeze brings a sense of calm compared to the brisk winds of earlier months, where January and February recorded averages around 4.7 m/s (11 mph) and 4.4 m/s (10 mph), respectively. The gradual decline from April’s 4.1 m/s (9 mph) to May marks a trend toward more tranquil conditions, setting the stage for the warmer summer months ahead. Interestingly, while June experiences a slight increase back to 4.0 m/s (9 mph), the overall pattern reveals a gradual transition to lighter winds, particularly prominent in the late spring and early summer. This gentle wind, complemented by the blooming landscapes, creates an inviting atmosphere perfect for exploration.
The weather in Reykjavik 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 Reykjavik and find detailed weather information for every month.
In May, the weather begins to warm up, with temperatures ranging from a chilly minimum of -3°C (27°F) to a comfortable maximum of 15°C (60°F), averaging around 7°C (44°F). Although May experiences a similar amount of precipitation to January, at 113 mm (4.4 in) over 18 days, the humidity is slightly lower at 85%. In contrast, January feels quite harsh, with temperatures dipping as low as -13°C (8°F) and averaging at 0°C (32°F), while peaking at a modest 10°C (50°F). The winter month also has high humidity, reaching 96%, and receives 113 mm (4.5 in) of precipitation over 16 days, contributing to its cold, damp atmosphere. For more details, check out Reykjavik weather in January.
In comparing the weather of February and May, we see a marked transition from the harshness of winter to the milder days of spring. February features much colder temperatures with a minimum of -18°C (1°F) and an average of 0°C (33°F), while May showcases a more temperate range, with a minimum of -3°C (27°F) and an average of 7°C (44°F). Additionally, February receives slightly more precipitation at 125 mm (4.9 in) compared to May's 113 mm (4.4 in), although both months see rain on approximately 18 days. Humidity is also higher in February at 95%, compared to May's 85%, reflecting the lingering effects of winter. For a deeper look at February conditions, visit Reykjavik weather in February.
In comparing the weather between May and March, it is evident that May is significantly warmer, with average temperatures reaching 7°C (44°F), compared to March’s chilly average of 1°C (34°F). The maximum temperature in May can rise to 15°C (60°F), making it a much more pleasant time of year. Both months experience a similar amount of precipitation, with May receiving 113 mm (4.4 in) and March close behind at 103 mm (4.1 in), but March has higher humidity at 94% compared to May's 85%. For a more detailed look at weather conditions during this time, you can check out Reykjavik weather in March.
In comparing the weather between April and May, we see a mild transition as spring unfolds. May experiences slightly warmer temperatures, with an average of 7°C (44°F) compared to April's 4°C (40°F). Additionally, May has a higher maximum temperature of 15°C (60°F) versus April's 14°C (57°F), while both months have similar minimum temperatures—-3°C (27°F) in May and -8°C (17°F) in April. However, April is notably wetter, with a precipitation total of 121 mm (4.8 in) compared to 113 mm (4.4 in) in May, although both months share the same number of rainy days, 18. Humidity levels are also slightly higher in April at 87%, versus 85% in May. For more detailed information about the weather in April, you can check Reykjavik weather in April.
In May, the weather features a cooler temperature range with a minimum of -3°C (27°F) and an average of 7°C (44°F), peaking at a maximum of 15°C (60°F). This month receives a significant amount of precipitation, totaling 113 mm (4.4 in) over 18 days, accompanied by high humidity levels at 85%. In contrast, June sees a slight increase in temperatures, with a minimum of 2°C (36°F), an average of 9°C (49°F), and a maximum of 18°C (65°F). Precipitation decreases to 92 mm (3.6 in) over 16 days, and humidity drops slightly to 81%. For more details about the weather in June, you can visit Reykjavik weather in June.
In May, temperatures in Reykjavik range from a chilly minimum of -3°C (27°F) to a milder maximum of 15°C (60°F), with an average of 7°C (44°F). The month sees significant precipitation, with 113 mm (4.4 in) over 18 days and a humidity level of 85%. By contrast, July offers a more temperate climate, with temperatures starting at a minimum of 4°C (40°F) and reaching up to 21°C (71°F), averaging around 11°C (53°F). While July has lower precipitation at 75 mm (3.0 in) over 16 days, humidity remains high at 86%. For more details on July weather, visit Reykjavik weather in July.
May and August present contrasting weather conditions. In May, temperatures range from a chilly -3°C (27°F) at night to a pleasant 15°C (60°F) during the day, while August sees milder nights starting at 5°C (41°F) and warmer days peaking at 20°C (68°F). Precipitation is more frequent in May, with 113 mm (4.4 in) falling over 18 days, compared to 83 mm (3.3 in) over 15 days in August. Additionally, humidity remains high in both months, with May averaging 85% and August slightly higher at 88%. For a closer look at the August climate, you can check out Reykjavik weather in August.
May and September in Reykjavik both feature similar maximum temperatures, hovering around 15°C (60°F), but the overall weather conditions differ notably. In May, temperatures range from a chilly -3°C (27°F) to an average of 7°C (44°F), with precipitation totaling 113 mm (4.4 in) over 18 days and humidity at 85%. Conversely, September experiences slightly warmer average temperatures of 8°C (47°F) and a minimum of -2°C (29°F), but it brings higher precipitation levels at 164 mm (6.5 in) across 20 days, accompanied by increased humidity at 92%. For more detailed information, check out Reykjavik weather in September.
May and October both feature chilly temperatures, but May generally offers slightly milder weather. In May, the temperature ranges from a low of -3°C (27°F) to a comfortable high of 15°C (60°F), with an average of 7°C (44°F). It also experiences significant precipitation, totaling 113 mm (4.4 in) over 18 days. Conversely, October sees a slightly colder range, with temperatures dropping to a minimum of -4°C (25°F) and peaking at 13°C (56°F), averaging around 5°C (42°F). Although October experiences less precipitation at 96 mm (3.8 in) over 16 days, the humidity is noticeably higher at 93%. For a more detailed look at the weather specifics, you can check Reykjavik weather in October.
In comparing the weather between May and November, we see a significant shift in temperature and humidity. May offers a milder climate with average temperatures around 7°C (44°F) and a maximum of 15°C (60°F), whereas November becomes much colder, with average temperatures dropping to 2°C (35°F) and a maximum of only 11°C (53°F). While both months experience considerable precipitation, May sees slightly more at 113 mm (4.4 in) over 18 days, compared to November's 105 mm (4.1 in) over 15 days. Additionally, November's humidity rises to 94%, making it feel even chillier than May's already high humidity of 85%. For more detailed information on November weather, you can visit Reykjavik weather in November.
May and December in Reykjavik exhibit quite contrasting weather patterns. In May, temperatures range from a minimum of -3°C (27°F) to a pleasant average of 7°C (44°F), peaking at a mild 15°C (60°F). The month sees around 113 mm (4.4 in) of precipitation over 18 days, with humidity levels at 85%. In contrast, December experiences significantly colder temperatures, with lows reaching -13°C (9°F) and an average around 0°C (33°F), culminating at a maximum of 10°C (50°F). This month has a slightly lower precipitation total of 106 mm (4.2 in) over 17 days, but higher humidity at 95%. For a closer look at the December weather in Reykjavik, visit Reykjavik weather in December.
As spring blossoms into summer, May in Reykjavik brings a noticeable shift in weather, with temperatures gradually rising and the daylight hours significantly increasing. Unlike the chillier and darker winter months, May offers a refreshing average temperature around 7°C, making outdoor exploration more enjoyable. However, it comes with its share of precipitation, as rain falls on approximately 18 days, contributing to an overall humidity level of 85%. The blend of milder temperatures and occasional showers creates a dynamic atmosphere, ideal for witnessing the enchanting beauty of Reykjavik as nature awakens. For a deeper dive into the city's climate patterns, visit Reykjavik Climate.