Last updated: August 21, 2025
May in Oulu, Finland, heralds a vibrant transition into warmer days, with maximum temperatures peaking at 27°C (80°F), while the average hovers around a cool 7°C (45°F). Residents and visitors can expect a minimum temperature of -6°C (21°F), showcasing the tail end of winter's chill. This month also brings about 49 mm (1.9 in) of precipitation over 8 days, contributing to the lush spring landscape. With an humidity level of 81%, the air is rich and invigorating, creating an ideal atmosphere for enjoying Oulu's blossoming natural beauty and outdoor activities.
As May awakens in Oulu, Finland, the lingering chill of winter gives way to a refreshing warmth, marking a significant shift in temperatures. The month presents a minimum temperature around -6°C (21°F), a far cry from the harsh depths of winter. With an average temperature rising to 7°C (45°F) and daytime highs peaking at 27°C (80°F), May showcases a vibrant transition into spring. This upward trend not only invites residents outdoors but also sets the stage for the summer months ahead, highlighting a notable increase in warmth and daylight that breathes life into the city after the long, cold months.
In May, Oulu, Finland experiences a noticeable uptick in precipitation, with 49 mm (1.9 in) of rainfall over 8 days. This increase from April's 38 mm (1.5 in) sets the stage for a lush transition into summer. May's precipitation signifies a trend towards wetter weather as the year progresses, preceding the peak rainfall periods of June and July, which see averages of 60 mm (2.4 in) and 73 mm (2.9 in), respectively. With the days of rain slightly fewer than those in the subsequent months, it's clear that May acts as a bridge, balancing the lingering chill of spring with the vibrant energy of the approaching summer.
In Oulu, Finland, the humidity levels reveal a clear trend as the year progresses. Starting with a peak of 100% in January, the air begins to gradually lose moisture, dipping to 81% by May. This decline highlights the transition to warmer months, with April already showing a noteworthy decrease to 87%. As spring unfolds, the relative humidity continues to drop, setting the stage for the drier days of summer that follow in June, where it reaches 77%. This pattern emphasizes the shifting climate of Oulu, moving from icy, moisture-laden air to a more temperate atmosphere as the season evolves. While the humidity in May remains relatively high compared to summer months, it signifies a refreshing change from the winter's grip, inviting a vibrant and lively spring in this northern city.
In May, Oulu experiences a notable increase in UV exposure, with the UV Index rising to 4, placing it in the moderate category. This shift signifies a change from the milder winter months, as earlier months such as January and February had a consistent low UV Index of 1. As the days grow longer and sunnier, residents and visitors should be aware that the burn time shortens to just 30 minutes during this period. This trend reflects the approaching summer, as the UV Index is poised to climb even higher in the following months. To stay informed and protect your skin, you can refer to the local resources at Oulu UV Index.
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May brings a burst of radiant sunshine to Oulu, Finland, as it enjoys an impressive 454 hours of sunlight. This marks a significant leap from the 364 hours in April, showcasing the intensifying brightness of spring. As the days grow longer, the shift from the winter's minimal sunlight becomes strikingly apparent—Oulu saw just 33 hours in January, gradually increasing each month. By May, residents can bask in nearly twice the sunlight compared to the previous months, setting the stage for the looming summer solstice. Following May, the sunshine peaks in June at 516 hours, but the trend of increasing daylight is already well underway, reminding Oulu's inhabitants of the vibrant warmth and energy that summer brings.
As May unfolds in Oulu, Finland, the likelihood of sunny weather offers a bittersweet transition into the warmer months. With only a 30% chance of sunshine, the month shows a notable dip compared to its sun-drenched successor, June, which boasts a 47% likelihood. This pattern reveals a trend where the earlier spring months, like March and April, feature higher chances of sun as they wave goodbye to winter’s grip. While May may not serve up an abundance of bright skies, it nonetheless hints at the arrival of summer's warmth, making every sunny moment feel like a cherished gift amid the blooming landscape.
As spring unfolds in Oulu, Finland, the daylight hours surge dramatically, marking a vibrant transition from the depths of winter to the brilliant light of summer. In January, the sun graces the land for a mere 5 hours, gradually increasing to 8 hours by February. March awakens with 11 hours, and by April, daylight blossoms to 15 hours, hinting at the longer days to come. May sees a remarkable leap to 18 hours, inviting residents to embrace the outdoors. June reaches its zenith with an impressive 21 hours of daylight, creating those enchanting nights where dusk feels like a fleeting moment. As summer wanes into July and August, daylight gently tapers to 19 and 16 hours, respectively, before transitioning back into shorter days in September at 12 hours. The descent continues through the autumn months, culminating in December, when daylight dips back to just 3 hours, reminding us of the cyclical dance of light experienced in this northern locale.
In May, Oulu experiences a gentle average wind speed of 3.2 m/s (7 mph), marking a slight dip from the slightly breezier conditions of March, which recorded 4.0 m/s. This month mirrors the winter months of January and February, where winds remained consistently mild at 3.2 and 3.3 m/s. As spring deepens, the winds begin to relax, foreshadowing the tranquility of summer with the average for June and July also holding steady at 3.1 m/s. May's subdued breezes create a pleasant environment, perfect for enjoying the blooming landscapes and the extended daylight hours. The trend indicates that while Oulu's winds generally vary, they remain relatively calm during this transitional period, offering a refreshing contrast to the gustier months that precede and follow it.
Weather in Oulu varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oulu, focusing on differences in temperature, rainfall, humidity, and UV levels.
The weather in May is a stark contrast to that of January, showcasing the transition from winter to spring. In May, temperatures range from a chilly -6°C (21°F) at their lowest to a comfortable 27°C (80°F) at their peak, with an average of 7°C (45°F). Precipitation occurs on about 8 days, totaling 49 mm (1.9 in), and humidity hovers around 81%. In contrast, January experiences much harsher conditions, with temperatures plummeting to a minimum of -32°C (-25°F) and averaging -7°C (19°F), while peaking at just 5°C (41°F). Winter's grip is evidenced by a higher humidity of 100% and slightly less precipitation over 10 days, totaling 40 mm (1.6 in). For a more detailed look at January's frigid conditions, check out Oulu weather in January.
When comparing the weather in May and February, there is a stark contrast in temperatures and overall conditions. May enjoys a mild average temperature of 7°C (45°F), with maximums soaring to 27°C (80°F), while February is much colder, with average temperatures at -8°C (17°F) and only reaching a maximum of 5°C (42°F). Additionally, February experiences significantly lower humidity at 98%, compared to May’s 81%. Precipitation levels are relatively similar, with May receiving 49 mm and February slightly less at 40 mm, but February has one more day of precipitation, totaling 9 days. For more detailed insights into February's weather, you can check out Oulu weather in February.
In comparing the weather conditions of May and March, notable differences emerge in both temperature and humidity. May generally offers a more temperate climate, with average temperatures peaking at 7°C (45°F) and reaching highs of 27°C (80°F), while March remains quite chilly, with average temperatures around -4°C (25°F) and maximums only reaching 7°C (45°F). March is characterized by significantly lower temperatures, with minimums plunging to -26°C (-15°F), compared to May’s milder minimum of -6°C (21°F). Additionally, May experiences slightly more precipitation (49 mm) over fewer days (8 days) than March, which sees 41 mm of precipitation spread over 11 days. The humidity in March is notably higher at 95%, while May's humidity sits at a somewhat comfortable 81%. For more detailed information, you can refer to Oulu weather in March.
In comparing the weather between April and May, we see a notable increase in temperatures. April's average temperature is a chilly 1°C (34°F), with a maximum of 14°C (57°F), while May ramps up to an average of 7°C (45°F) and peaks at a warm 27°C (80°F). Furthermore, May experiences slightly more precipitation, totaling 49 mm (1.9 in) over 8 days, compared to April's 38 mm (1.5 in) across 7 days. Humidity remains relatively high in both months, although it is slightly lower in May at 81% compared to April's 87%. For more details, you can refer to Oulu weather in April.
In comparing the weather of May and June, May experiences a wider range of temperatures, with a minimum of -6°C (21°F) and a maximum of 27°C (80°F), leading to an average of 7°C (45°F). In contrast, June offers slightly milder conditions, with a minimum of 1°C (34°F) and a maximum of 29°C (85°F), resulting in a more comfortable average temperature of 14°C (58°F). Precipitation levels are also higher in June, with 60 mm (2.4 in) of rain compared to May's 49 mm (1.9 in), and June sees rain on 9 days versus May's 8 days. Humidity is a bit lower in June at 77%, compared to 81% in May, making it feel slightly more pleasant. For more details, check out Oulu weather in June.
In comparing the weather between May and July, May typically experiences a wider temperature range, with minimums dropping as low as -6°C (21°F) and maximums reaching up to 27°C (80°F). The average temperature of 7°C (45°F) indicates the cooler transition into summer, alongside a relatively high humidity of 81%. May also sees around 49 mm (1.9 in) of precipitation over approximately 8 days.
In contrast, July presents warmer conditions, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 32°C (90°F), and an average temperature of 17°C (63°F). Precipitation increases in July to about 73 mm (2.9 in) over 11 days, with humidity slightly lower at 79%. For those interested in the specifics of the July weather, more details can be found at Oulu weather in July.
May and August present distinctly different weather patterns. In May, temperatures range from a minimum of -6°C (21°F) to a comfortable maximum of 27°C (80°F), with an average temperature of 7°C (45°F). The month experiences about 49 mm (1.9 in) of precipitation spread over approximately 8 days, with humidity levels at 81%. In contrast, August sees higher temperatures, with a minimum of 1°C (34°F) and a maximum of 31°C (88°F), resulting in an average of 14°C (58°F). This month also experiences more rain, with total precipitation reaching 91 mm (3.6 in) over 14 days and slightly higher humidity at 84%. These comparisons highlight the transition from the cool and variable spring weather of May to the warmer and more humid summer conditions of August. For more detailed insights, you can check out Oulu weather in August.
May and September present distinct contrasts in weather conditions. In May, temperatures range from a chilly -6°C (21°F) at night to a warm 27°C (80°F) during the day, with an average of 7°C (45°F). The month experiences moderate rainfall, totaling 49 mm (1.9 in) over about 8 days, and humidity sits at 81%.
In contrast, September sees slightly milder temperatures, with nighttime lows of -4°C (24°F) and daytime highs peaking at 24°C (75°F), averaging around 10°C (49°F). However, it tends to be wetter, with precipitation totaling 71 mm (2.8 in) across approximately 13 days and higher humidity at 90%. For more detailed information, you can check the Oulu weather in September.
May and October present distinct weather patterns, reflecting the transition from spring to autumn. In May, temperatures can range from a chilly -6°C (21°F) at the minimum to a warm 27°C (80°F) at the maximum, with an average of 7°C (45°F). The month experiences about 49 mm (1.9 in) of precipitation over 8 days, complemented by moderate humidity levels of 81%. In contrast, October sees lower temperatures, with a minimum of -12°C (10°F), an average of 4°C (40°F), and a maximum of 18°C (64°F). This month is wetter, accumulating 81 mm (3.2 in) of precipitation over 15 days and higher humidity at 95%. For more detailed information, you can check Oulu weather in October.
May and November present contrasting weather conditions. In May, temperatures can range from a brisk -6°C (21°F) at night to a warm 27°C (80°F) during the day, with an average temperature of 7°C (45°F). The month sees about 49 mm (1.9 in) of precipitation over 8 days, accompanied by a relatively moderate humidity of 81%. In stark contrast, November experiences much colder temperatures, with a minimum of -18°C (0°F) and a maximum temperature of just 9°C (49°F), averaging -1°C (31°F). This month also sees increased precipitation, totaling 62 mm (2.4 in) over 13 days, and the humidity rises to a high of 95%. For more detailed information, you can visit Oulu weather in November.
In May, temperatures range from a chilly -6°C (21°F) at night to a pleasant maximum of 27°C (80°F) during the day, with an average temperature of around 7°C (45°F). The month experiences relatively light precipitation totaling 49 mm (1.9 in) over about 8 days, accompanied by a humidity level of 81%. In contrast, December brings much colder conditions, with temperatures dipping to a minimum of -24°C (-12°F) and averaging -5°C (24°F), peaking at only 4°C (40°F). Precipitation increases to 58 mm (2.3 in) spread over 14 days, along with a high humidity of 99%. For more detailed information, you can visit Oulu weather in December.
As May unfolds in Oulu, it marks a transition from the chill of winter to the burgeoning warmth of summer. With temperatures gradually rising, the month enjoys a pleasant average that encourages outdoor activities amid the lingering cool nights. While the humidity can feel a bit high, the occasional precipitation brings refreshing bursts, setting the stage for lush greenery. This delightful mix of mild warmth and moisture distinguishes May from the harsher conditions of earlier months, making it an ideal time to experience the vibrant springtime atmosphere. For a deeper dive into what to expect throughout the year, visit Oulu Climate.