Last updated: August 21, 2025
In Oshima, Japan, May brings a refreshing embrace of spring, characterized by a max temperature of 23°C (73°F) and a comfortable average of 19°C (66°F). Visitors can expect to feel the coolness of the season with minimum temperatures dipping to 13°C (56°F). Although the month is marked by occasional rain, with total precipitation reaching 198 mm (7.8 in) over about 11 days, the lush greenery and vibrant blossoms shine through, making it a picturesque time to explore the island. With humidity at 81%, the air is pleasantly crisp, enhancing the island's natural beauty and inviting outdoor adventures.
In May, Oshima, Japan, awakens to the warm embrace of spring, with temperatures revealing a significant uptick compared to the preceding months. The minimum temperature rises to a comfortable 13°C (56°F), while the average settles at a pleasant 19°C (66°F), peaking at a delightful 23°C (73°F) during the day. This transition marks a delightful shift from the cooler spring air, with May standing out as a month that invites outdoor activities and exploration of the island's natural beauty. As the days warm, Oshima prepares to transition seamlessly into summer, offering a perfect blend of mild days and gentle breezes.
In May, Oshima, Japan experiences a substantial precipitation total of 198 mm (7.8 in), marking it as a notably wet month with rainfall occurring on 11 days. This increase reflects a trend of rising precipitation as spring transitions into summer, following the impressive totals seen through March (201 mm) and April (157 mm). The month’s rainfall plays a crucial role in nourishing the verdant landscapes that flourish during this time, contributing to the overall lushness of the island. As the region gears up for the even wetter months of June (277 mm) and July (301 mm), May serves as a pivotal bridge, capturing the essence of spring while ushering in the summer monsoon season.
In May, Oshima, Japan experiences a noticeable spike in humidity, reaching 81%. This increase reflects the transition into the warmer months, where moisture levels begin to rise significantly. Comparatively, the earlier months of the year, such as January and February, hover around 76% and 74%, respectively, indicating a drop in humidity as winter wanes. As the landscape begins to flourish in spring, April remains relatively stable with 74% humidity. However, May marks the onset of a consistent upward trend, foreshadowing the much more humid conditions of June, which jumps to 88% and continues to peak in the summer months. This pattern not only influences the climate of Oshima but also enriches its lush surroundings as the year progresses.
In May, Oshima, Japan, experiences a significant shift in UV exposure, with the UV Index soaring to 11, categorized as extreme. With a burn time reduced to just 10 minutes, it's essential for residents and visitors to take precautions when spending time outdoors. This trend marks a continuation of the increasing UV levels observed since March, escalating from a moderate index of 4 in January to an alarming extreme by mid-year. As summer approaches, with June and July maintaining the same extreme levels, awareness of sun safety becomes paramount. Discover more about UV trends and stay informed through the Oshima UV Index.
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In the enchanting island of Oshima, Japan, May shines particularly brightly, boasting an impressive 293 hours of sunlight. This marks a delightful culmination of increasing daylight hours as the year progresses, starting from 189 hours in January. Each month leads to a gradual ascent, with April already basking in 276 hours. Following May, the summer months of June and July see a slight dip, yet they still enjoy a substantial amount of sunshine at 270 and 273 hours respectively. August peaks with 313 hours, showcasing the height of summer before the gradual decline resumes in the autumn months. This captivating trend underscores Oshima's vibrant seasonal transitions, making it a perfect escape for sun-seekers in May and beyond.
In Oshima, Japan, the likelihood of sunny weather takes a noticeable dip in May, with a 27% chance of sunshine, marking it as one of the cloudier months in the year. This decline is evident when considering the trend from the preceding months; after relatively brighter days in January through April, May's forecast contrasts sharply with the higher probabilities of sun earlier in the spring. Following this pattern, June continues the trend of reduced sunshine, dropping further to 25%. Interestingly, as the year progresses into autumn, the chances of sun start to gradually rise again, suggesting that while May may not be a month for basking in sunlight, Oshima has brighter days ahead.
In Oshima, Japan, daylight duration experiences a gradual evolution throughout the year. Starting the year with 10 hours of daylight in both January and February, the days begin to grow longer as spring approaches, reaching 11 hours in March and expanding to 13 hours in April and May. This increase signifies the transition into the vibrant energy of summer, where daylight peaks at 14 hours in June and July. As the season shifts, the daylight begins to wane, tapering off to 13 hours in August and gradually decreasing to 12 hours in September. By the time autumn sets in, daylight further diminishes, offering 11 hours in October and descending to 10 hours in November. The year concludes with the shortest daylight hours in December at just 9 hours. This clear cyclical pattern of daylight duration not only reflects the natural rhythm of the seasons but also enhances the charm of Oshima throughout the year.
In Oshima, Japan, the month of May experiences a gentle shift in wind conditions, with an average wind speed of 7.3 m/s (16 mph). This marks a slight increase from the preceding months of March and April, which recorded speeds of 7.0 m/s (16 mph) and 7.2 m/s (16 mph), respectively. As spring transitions into summer, the winds begin to ease, contrasting the brisk winds of the winter months, which ranged from 9.2 m/s (21 mph) in December to 9.4 m/s (21 mph) in February. Overall, May's breezes, while softer than the peak winter gusts, maintain a refreshing quality, setting a pleasant tone for the summer ahead.
Weather in Oshima varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oshima, focusing on differences in temperature, rainfall, humidity, and UV levels.
In May, temperatures are much warmer than in January, with minimums around 13°C (56°F) and maximums reaching 23°C (73°F), while January's temperatures range from a chilly 2°C (36°F) to a mild 18°C (65°F). Additionally, May experiences significantly higher precipitation, totaling 198 mm (7.8 in) over 11 days, compared to January's 91 mm (3.6 in) over just 9 days. The humidity is also slightly higher in May at 81%, compared to 76% in January. Overall, May offers a much more pleasant and humid environment than the cooler and drier conditions found in January. For more detailed insights, you can check out Oshima weather in January.
In comparing the weather between May and February, a noticeable shift in temperatures and precipitation patterns emerges. May typically sees milder temperatures, with lows around 13°C (56°F) and highs reaching up to 23°C (73°F), averaging 19°C (66°F). In contrast, February is considerably cooler, with minimum temperatures dipping to 4°C (39°F) and an average around 10°C (50°F), while the maximum can still reach 19°C (66°F).
Additionally, May experiences significantly more rainfall, with a total of 198 mm (7.8 in) over 11 days, compared to February’s 89 mm (3.5 in) over the same number of days. The humidity also tends to be higher in May at 81%, compared to February's 74%. This difference highlights how May transitions towards warmer, wetter conditions as winter gives way to spring. For more specific insights into February weather, you can check Oshima weather in February.
In comparing the weather of May and March, it's clear that May offers significantly warmer temperatures, with averages reaching 19°C (66°F) compared to March's 13°C (55°F). While both months experience substantial rainfall, March sees slightly more precipitation at 201 mm (7.9 in) over 14 days, versus May's 198 mm (7.8 in) over 11 days. Humidity levels are higher in May at 81%, compared to March's more comfortable 70%. For a detailed look at March weather specifics, you can check Oshima weather in March.
In comparing the weather of May and April, May tends to be warmer, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 23°C (73°F), compared to April's minimum of 7°C (46°F) and maximum of 21°C (71°F). May also sees higher levels of precipitation, accumulating 198 mm (7.8 in) over 11 days, while April has a total of 157 mm (6.2 in) across 12 days. Additionally, May boasts a higher humidity level of 81% compared to April's 74%. For more details, you can check Oshima weather in April.
May and June exhibit notable differences in weather conditions. In May, temperatures range from a minimum of 13°C (56°F) to a maximum of 23°C (73°F), with an average of 19°C (66°F). The month sees significant precipitation, totaling 198 mm (7.8 in) over approximately 11 days, accompanied by a humidity level of 81%. In contrast, June presents warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 25°C (78°F), averaging 22°C (71°F). However, it also experiences higher precipitation, amounting to 277 mm (10.9 in) over about 14 days, coupled with increased humidity at 88%. For more details on June weather specifics, you can visit Oshima weather in June.
May and July exhibit distinctly different weather patterns. In May, temperatures range from a mild 13°C (56°F) at night to a pleasant average of 19°C (66°F), peaking at around 23°C (73°F) during the day. The month sees significant rainfall, with a total of 198 mm (7.8 in) spread across 11 days and humidity levels at 81%. In contrast, July experiences warmer conditions, with minimum temperatures starting at 20°C (69°F) and averaging 25°C (77°F), reaching highs of 29°C (85°F). This month is also wetter, with precipitation totaling 301 mm (11.9 in) over 15 days, accompanied by increased humidity at 93%. For more detailed weather insights, see Oshima weather in July.
May and August present quite different weather patterns. In May, temperatures range from a cool 13°C (56°F) at night to a mild maximum of 23°C (73°F) during the day, coupled with an average humidity of 81%. This month is also marked by significant rainfall, totaling 198 mm (7.8 in) over approximately 11 days.
In contrast, August boasts warmer temperatures, with nightly lows of 22°C (72°F) and daytime highs reaching up to 29°C (85°F), creating a more tropical atmosphere. Despite having slightly less precipitation at 155 mm (6.1 in) across 13 days, the humidity rises to 90%, adding to the overall stickiness of the season. For more detailed insights on August weather, you can check Oshima weather in August.
May and September present distinct weather profiles, showcasing the transition from spring to autumn. In May, temperatures are milder, with a minimum of 13°C (56°F) and an average of 19°C (66°F), while September boasts warmer conditions, with minimum temperatures around 19°C (67°F) and an average of 25°C (76°F). Precipitation levels increase from May to September, with May receiving 198 mm (7.8 in) over 11 days, compared to September's higher total of 249 mm (9.8 in) across 19 days. Additionally, humidity rises slightly in September to 86% from 81% in May, suggesting a more humid climate as summer fades. For more information on September's weather, visit Oshima weather in September.
In May, temperatures range from a mild 13°C (56°F) to a comfortable 23°C (73°F), with an average of 19°C (66°F). However, this month sees significant rainfall, with about 198 mm (7.8 in) spread over 11 days and humidity levels around 81%. In contrast, October experiences slightly warmer temperatures, with a minimum of 15°C (59°F) and a maximum of 27°C (80°F), averaging 21°C (70°F). The month is wetter than May, with an impressive 339 mm (13.4 in) of precipitation over 18 days, while humidity remains comparable at 83%. For more detailed insights into October weather, check out Oshima weather in October.
May and November present a contrasting yet mild climate. In May, temperatures begin at a minimum of 13°C (56°F) and reach an average of 19°C (66°F), with a maximum of 23°C (73°F). The month experiences considerable rainfall, totaling 198 mm (7.8 in) over 11 days, contributing to a relatively high humidity level of 81%. In contrast, November sees a drop in minimum temperatures to 8°C (47°F) and maintains an average of 17°C (63°F), while still peaking at 23°C (73°F). Although November has less precipitation at 152 mm (6.0 in) spread across 15 days, the humidity remains similar at 80%. For more detailed weather information, you can check Oshima weather in November.
The weather in May is typically warmer and more humid than in December, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 23°C (73°F). In contrast, December features cooler temperatures, with averages between 5°C (41°F) and 21°C (71°F). While May experiences higher precipitation levels, totaling 198 mm (7.8 in) over 11 days, December sees less rain, with 95 mm (3.7 in) over 12 days. Humidity is also slightly lower in December at 78%, compared to May's 81%. For more detailed information on December weather, check out Oshima weather in December.
May in Oshima welcomes the arrival of milder temperatures, making it a delightful transition from the cooler spring months. With an average temperature around 19°C and maximums reaching 23°C, the weather is pleasantly warm yet comfortable. However, be prepared for increased humidity at 81%, which may amplify the warmth on certain days. Alongside this rise in temperatures, May also experiences a notable amount of rainfall, accumulating around 198 mm over approximately 11 rainy days. This stands in contrast to both the preceding months and the drier summer that follows, giving May a unique character that blends warmth with the lush vibrancy of nature. For more insights on what to expect, check out Oshima Climate.