Last updated: August 27, 2025
May in Oslo, Norway, offers a refreshing transition into spring, with temperatures ranging from a crisp -3°C (26°F) at night to a pleasant maximum of 29°C (85°F) during the day. The average temperature hovers around 10°C (51°F), creating a cool yet inviting atmosphere ideal for outdoor activities. While residents can expect about 90 mm (3.5 in) of precipitation over 12 days, the high humidity of 73% adds a distinctive freshness to the air. As nature awakens, May in Oslo is a captivating blend of vibrant greenery and lively urban culture, making it an enchanting time to explore this beautiful city.
As spring reaches its peak in Oslo, Norway, May brings a refreshing change in temperatures that herald the arrival of summer. With a minimum of -3°C (26°F) and an average temperature of 10°C (51°F), the city begins to shake off winter's chill. Daytime highs can soar to an impressive 29°C (85°F), allowing residents and visitors alike to bask in the extended daylight hours. This notable increase from the preceding months reflects a trend of gradual warming, making May a delightful time to explore Oslo’s vibrant culture and scenic beauty as nature bursts into bloom. It's a month that perfectly balances the remnants of winter with the promise of summer's warmth.
In May, Oslo experiences a notable shift in precipitation patterns, with rainfall reaching 90 mm (3.5 in) over 12 days. This increase from the previous months marks a transition into the wetter season, paving the way for the lush greenery that characterizes late spring in Norway's capital. The average rainfall during May is significantly higher than April's 38 mm (1.5 in), reflecting the city’s growing exposure to spring weather systems. As Oslo steps into the summer months, the steady rise in precipitation continues, setting the stage for vibrant landscapes and a lively atmosphere, despite the increased number of rainy days. This trend highlights the importance of embracing the occasional showers that nourish the city’s natural beauty.
As spring transitions into summer, May in Oslo offers a noticeable shift in humidity levels, descending to a comfortable 73%. This marks a significant drop from the winter months, where humidity levels hovered around 94% in January and 92% in February. Following the trend of decreasing humidity, April also saw a relative high at 82%. With the arrival of June, Oslo continues to experience a further decline, reaching 71%, suggesting that the city's weather is becoming more pleasant and less oppressive as summer approaches. This gradual decrease not only enhances outdoor activities but also signifies the start of a more temperate period in the Norwegian capital.
As spring unfolds, May in Oslo sees a moderate UV Index of 5, which signals an increase in sun intensity compared to the earlier months of the year. After starting the year with low exposure categories — where January and February featured an Index of just 1 and 2 — the UV levels gradually rose through March and April, reflecting an awakening of the sun's rays. In May, outdoor enthusiasts should be mindful of 30 minutes of burn time, indicating the need for protection during outdoor activities. This trend continues into the summer months, where the UV Index peaks at 7 in June and July, emphasizing the importance of sun safety as the season progresses. For more details on sun safety in Oslo, visit Oslo UV Index.
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As spring transitions into summer, Oslo experiences a delightful surge in sunshine hours in May, bringing a total of 404 hours to the city's skyline. This steady increase from 369 hours in April highlights the gradual emergence of longer, brighter days that characterize the late spring. Following the robust 286 hours in March, May further cements its role as a time of blossoming nature and vibrant outdoor activities. The shift from winter's dim lighting—culminating in a mere 89 hours in January—to the lively brightness of June, with a peak of 441 hours, demonstrates how rapidly Oslo shakes off its chilly cloak, inviting residents and visitors alike to embrace the warmth and light of the season.
In Oslo, Norway, the likelihood of sunny weather experiences a notable peak in April, with a 56% chance of sunshine, hinting at the arrival of spring. However, as May rolls in, this trend takes a surprising dip to 27%, making it one of the less sunny months of the year. This drop bucks the expectation of increasing sunshine as the days grow longer, echoing the capricious nature of early summer in Scandinavia. As the calendar transitions from May to June, the possibility of clear skies rebounds to 36%, suggesting that while May might be a bit shy on sunshine, the promise of brighter days is just around the corner.
In Oslo, Norway, May marks a significant leap in daylight duration, with the city basking in 17 glorious hours of sunlight. This month stands out as a vibrant transition from the long, dark winter months, where daylight barely reaches 6 hours in January. As spring unfolds, hours of light begin to accumulate, climbing steadily to 14 hours in April before leaping again in May. The gradual increase continues through summer, peaking in June with 18 hours, before gently receding as autumn approaches. The trend showcases a remarkable journey from wintry shadows to the blissful brightness of May, inviting both residents and visitors to embrace outdoor activities as the days grow longer and warmer.
In May, Oslo experiences a slight dip in wind speed, averaging 2.4 m/s (5 mph), which is a decrease from the 3.0 m/s (7 mph) recorded in April. This month marks a transition as the brisk spring winds begin to give way to the gentler summer breezes that follow, with June also maintaining a calm average of 2.4 m/s (5 mph). Interestingly, the trend shows that the wind speeds across the early months of the year are relatively stable, hovering around 2.6-3.0 m/s until the lateness of the year, when they pick up again in October to reach 3.2 m/s (7 mph). As the seasons shift and the warmth of summer approaches, May serves as a gentle reminder of the changing patterns, offering a serene atmosphere perfect for outdoor enjoyment amidst the mild winds.
Weather in Oslo varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oslo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In May, temperatures in Oslo range significantly, with a minimum of -3°C (26°F), an average of 10°C (51°F), and a maximum reaching up to 29°C (85°F). The month experiences a moderate level of precipitation, totaling 90 mm (3.5 in) over approximately 12 days, accompanied by a humidity level of 73%. In stark contrast, January's cold grip is evident with minimum temperatures plunging to -18°C (-1°F), an average of -3°C (27°F), and a maximum of just 9°C (49°F). Precipitation is lower in January at 60 mm (2.4 in) over 9 days, but the humidity is notably higher at 94%. For more details on the January weather conditions, you can explore Oslo weather in January.
May and February present strikingly different weather conditions. In May, temperatures range from a chilly -3°C (26°F) at their lowest, to a warm average of 10°C (51°F), peaking at a pleasant 29°C (85°F). The precipitation in May is notably higher, totaling 90 mm over 12 days, with a humidity level of 73%, which contributes to a fresh, lively atmosphere as spring unfolds.
Conversely, February is much colder, with a minimum temperature plunging to -20°C (-4°F) and an average temperature hovering around -3°C (27°F). While it has less precipitation at 64 mm over 10 days, the humidity is higher at 92%, contributing to the sharp winter chill. Those interested in understanding the winter climate can find more detailed information here: Oslo weather in February.
May weather in Oslo features a significant increase in temperatures, with a minimum of -3°C and an average of 10°C, peaking at 29°C. This month also sees slightly more precipitation, totaling 90 mm over about 12 days, but with lower humidity at 73%. In contrast, March is much colder, with temperatures ranging from a minimum of -18°C and averaging around 0°C, reaching a maximum of 16°C. It has less precipitation, totaling 65 mm over 9 days, but higher humidity at 89%. For more details, you can visit Oslo weather in March.
In comparing the weather of April and May, significant differences emerge. April experiences colder temperatures, with a minimum of -12°C (11°F) and an average of 5°C (41°F), while May sees a much warmer range, with temperatures starting at a minimum of -3°C (26°F) and averaging 10°C (51°F). Additionally, May boasts a higher maximum temperature of 29°C (85°F) compared to April's 23°C (73°F). Precipitation levels also vary, with April receiving 38 mm (1.5 in) over just 6 days, whereas May has a total of 90 mm (3.5 in) spread across 12 days, indicative of its wetter climate. Furthermore, humidity is slightly lower in May at 73%, compared to April's 82%. If you're interested in further details, you can check the Oslo weather in April.
In comparing May and June weather, May experiences a broader temperature range, with minimums dipping as low as -3°C (26°F) and average temperatures around 10°C (51°F), reaching up to a maximum of 29°C (85°F). In contrast, June sees an increase in average temperature to 16°C (61°F), with minimums starting at 3°C (38°F) and reaching a high of 30°C (86°F). Precipitation is relatively similar in both months, with May receiving 90 mm (3.5 in) over 12 days and June a slightly lower 86 mm (3.4 in) over the same number of days. Humidity remains fairly consistent, with May at 73% and June at 71%. For a closer look at the specific weather conditions throughout June, you can visit Oslo weather in June.
In May, temperatures range from a minimum of -3°C (26°F) to a maximum of 29°C (85°F), with an average of 10°C (51°F). The month experiences 90 mm (3.5 in) of precipitation over about 12 days, and the humidity hovers around 73%. In contrast, July offers warmer temperatures with a minimum of 5°C (41°F) and a maximum of 32°C (90°F), averaging 17°C (63°F). Although July sees slightly more precipitation at 103 mm (4.1 in) over 11 days, the humidity is marginally lower at 72%. For more detailed information, please visit Oslo weather in July.
When comparing the weather in May and August, several distinct differences emerge. May experiences cooler temperatures with a minimum of -3°C (26°F) and an average of 10°C (51°F), while August shows a milder climate with a minimum of 5°C (42°F) and an average of 15°C (60°F). Both months have similar maximum temperatures, peaking at 29°C (85°F) in May and slightly lower at 28°C (83°F) in August. Precipitation levels are fairly comparable, with May receiving 90 mm (3.5 in) over 12 days and August recording 100 mm (3.9 in) over 13 days, indicating a slightly wetter August. Humidity also increases from 73% in May to 77% in August. For more details on the August weather patterns, visit Oslo weather in August.
May and September showcase distinct weather patterns, reflecting the transition from spring to autumn. In May, temperatures range from a chilly minimum of -3°C (26°F) to a warm maximum of 29°C (85°F), with an average of 10°C (51°F). The month sees about 90 mm (3.5 in) of precipitation over 12 days and a humidity level of 73%. In contrast, September experiences milder temperatures, ranging from a minimum of 1°C (35°F) to a maximum of 25°C (77°F), averaging 12°C (53°F). This month brings slightly more rainfall at 106 mm (4.2 in) over 13 days, accompanied by higher humidity at 86%. For more detailed information on September weather, you can visit Oslo weather in September.
In comparing the weather between May and October, notable differences arise in temperature and humidity levels. May typically experiences a temperature range from a chilly -3°C (26°F) to a warm 29°C (85°F), with an average of 10°C (51°F). In contrast, October sees cooler temperatures, with a minimum of -4°C (25°F) and a maximum of only 17°C (63°F), averaging at 7°C (44°F). Additionally, May boasts lower precipitation at 90 mm (3.5 in) over 12 days, while October receives higher rainfall at 130 mm (5.1 in) across 14 days. The humidity also rises in October, reaching 92%, compared to May's 73%. For more specific details, check out Oslo weather in October.
May and November present contrasting weather patterns, reflecting the transition from spring to winter. In May, temperatures range from a chilly minimum of -3°C (26°F) to a pleasant maximum of 29°C (85°F), with an average of 10°C (51°F). The month experiences about 90 mm (3.5 in) of precipitation over 12 days and has a relatively moderate humidity level of 73%. In stark contrast, November sees colder temperatures, with a minimum of -9°C (15°F) and an average of only 2°C (36°F), peaking at 14°C (57°F). This month tends to be wetter, with 107 mm (4.2 in) of rainfall across the same number of days, and a higher humidity of 93%, contributing to a colder, more damp atmosphere. For more details on the November climate, check out Oslo weather in November.
In May, the weather in Oslo begins to warm up, with temperatures ranging from a chilly -3°C (26°F) at night to a pleasant max of 29°C (85°F) during the day. The month sees an average temperature of around 10°C (51°F) and experiences about 90 mm (3.5 in) of precipitation over approximately 12 days, with humidity levels hovering around 73%.
In contrast, December brings significantly colder conditions, with temperatures dropping to a minimum of -16°C (3°F) and peaking at a maximum of 7°C (45°F). The average temperature in December is a stark -2°C (28°F), and the month records higher precipitation at 107 mm (4.2 in) over 16 days, accompanied by increased humidity levels of 93%. For more detailed information, check out Oslo weather in December.
As spring blossoms in Oslo, May ushers in a delightful shift in weather, offering a refreshing contrast to the chill of earlier months. Temperatures can rise quite dramatically, with enjoyable warm days mixed among typical cool spells. While the month sees an increase in precipitation, the vibrant greenery that emerges makes it feel revitalizing rather than dreary. Humidity levels reach a comfortable peak, allowing for pleasant outdoor experiences as locals and visitors alike explore the city’s beauties. For a detailed understanding of the city’s changing seasons, check out Oslo Climate.