Last updated: August 21, 2025
In Onomichi, Japan, May ushers in a delightful transition with an average temperature of 20°C (68°F), peaking at a warm 31°C (89°F). Amidst the pleasant warmth, expect a few rainy days, as the region experiences 107 mm (4.2 in) of precipitation over 9 days. Humidity levels remain high at 84%, adding a touch of tropical feel to the air. This vibrant month invites both locals and visitors to enjoy the blooming landscapes while remaining prepared for occasional showers.
In May, Onomichi experiences a delightful transition into warmer weather, with temperatures reflecting the vibrant bloom of spring. Early in the month, the minimum temperature hovers around a comfortable 7°C (46°F), while the daily average rises to a pleasant 20°C (68°F), providing the perfect backdrop for outdoor activities. As days progress, the maximum temperature can soar to 31°C (89°F), hinting at the impending summer heat. This month’s steady increase in warmth marks a sharp contrast to the cooler temperatures of the preceding months, making May an ideal time to explore the charming streets and scenic vistas of this picturesque Japanese town.
In Onomichi, Japan, May brings a moderate precipitation level of 107 mm (4.2 in), continuing a trend established in the preceding months. With 9 rainy days, May marks a slight decrease from April's 8 days but still maintains a consistent pattern of spring showers that lay the groundwork for the summer deluge ahead. The rainfall in May serves as a gentle precursor to the heavier downpours of June, which often burgeon to 149 mm (5.9 in) over 12 days. This steady accumulation hints at the transition into the more intense rainy season, while also nourishing the vibrant landscapes that define the region.
In May, Onomichi, Japan experiences a notable rise in humidity, reaching 84% as spring transitions into summer. This increase signals the onset of the more humid months ahead, with June following closely behind at 86%. The trend shows a gradual ascent from the drier winter months, where humidity levels hovered around 79%-82%. By May, the air begins to feel noticeably thicker, paving the way for the intense humidity of the peak summer months. This shift not only impacts the local climate but also influences outdoor activities and the natural beauty of the region, as lush greenery flourishes under the increased moisture.
In May, Onomichi, Japan experiences a significant uptick in its UV Index, reaching an impressive 11, indicating an extreme level of sun exposure. This surge marks a stark contrast to the earlier months, where the UV Index fluctuated between 4 and 10. With a burn time of just 10 minutes, it's crucial for residents and visitors alike to take precautions against skin damage. As the season progresses into June and July, the UV Index remains steady at 11 and eventually peaks at 12, suggesting that the intensity of the sun is a persistent trend during the summer months. For those planning outdoor activities, staying informed about the Onomichi UV Index will be essential for maintaining safety and skin health.
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As May arrives in Onomichi, Japan, residents and visitors alike are greeted with an impressive 305 hours of sunshine, marking the peak of the spring season. This month stands out following a steady increase in sunlight from January's 184 hours, as the days gradually lengthen and the warmth of early summer begins to permeate the air. The sunshine hours continue to rise sharply, especially in May, showcasing a vibrant transition into the lushness of late spring. Following May, the sunshine starts to level off, with August recording a slight uptick at 309 hours, before gradually tapering down into the cooler months. This trend not only highlights the energetic spirit of May but also sets the stage for the warm, sun-drenched days that characterize Onomichi’s summer months.
In Onomichi, Japan, the likelihood of sunny weather takes a noticeable dip in May, with a 32% chance of clear skies. This decline follows a relatively consistent pattern from the spring months; both March and April offer better chances at 40% and 47% respectively, suggesting that the region enjoys more sunshine as it transitions into spring. However, as the year progresses into June and the hotter summer months, the probability of sun decreases further to 26% and 24%. Thus, May marks a turning point where sunny days become less frequent, a trend that continues into the summer, reinforcing the notion that for sun-seekers, late spring may not be the best time to visit Onomichi.
In Onomichi, Japan, the rhythm of daylight unfolds beautifully throughout the year. As winter recedes, January and February register a steady 10 hours of sunlight, but by March, a gradual increase to 11 hours hints at the arrival of spring. This upward trend continues into April and May, where daylight remains constant at 13 hours, nurturing the lush landscapes and vibrant blooms of the season. The sun reaches its zenith in June and July, offering 14 hours of radiant light, ideal for outdoor adventures. However, as summer wanes, August experiences a slight dip back to 13 hours, followed by a gentle decline into autumn, with daylight gradually diminishing to 12 hours in September and further down to 9 hours by December. This cyclical variation not only marks the changing seasons but also enriches the experience of life in Onomichi, creating a captivating interplay between light and nature.
In Onomichi, Japan, the month of May typically experiences a gentle breeze, with an average wind speed of 2.9 m/s (7 mph). This tranquil wind pattern is consistent with the calming trends observed in the preceding months of spring, where April also recorded a similar speed. Notably, this marks a subtle decline from the higher winds of the winter months, where January and February brought average speeds of 3.4 m/s (8 mph) and 3.8 m/s (8 mph) respectively. As the seasons shift, the steadiest breezes occur in the earlier months of the year, while summer approaches with lighter winds, suggesting a comforting transition that enhances the serene beauty of Onomichi’s coastal landscape.
Weather in Onomichi varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Onomichi, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present contrasting weather conditions. In May, temperatures range from a cool 7°C (46°F) to a warm 31°C (89°F), with an average of 20°C (68°F), making it a much warmer month overall. However, this warmth is accompanied by higher precipitation of 107 mm (4.2 in) spread over 9 days, contributing to a humidity level of 84%. In stark contrast, January experiences much colder temperatures, with a minimum of -5°C (24°F) and a maximum of 15°C (59°F), averaging just 6°C (43°F). This month sees significantly less rainfall, with only 40 mm (1.6 in) of precipitation over 5 days and a slightly lower humidity level of 82%. For more detailed information, you can visit Onomichi weather in January.
May and February offer strikingly different weather conditions. In May, temperatures range from a mild 7°C (46°F) to a warm 31°C (89°F), with an average of 20°C (68°F) and higher humidity at 84%. The month sees a total of 107 mm (4.2 inches) of precipitation over about 9 days. In contrast, February features cooler temperatures, with a minimum of -3°C (26°F) and a maximum of 20°C (69°F), averaging just 6°C (44°F). This month has lower precipitation of 54 mm (2.1 inches) spread across 6 days, and slightly lower humidity at 79%. For more details about February weather, you can visit Onomichi weather in February.
May and March present distinct weather profiles that reflect the transition from early spring to early summer. In March, temperatures range from a chilly minimum of 0°C (32°F) to a comfortable average of 10°C (51°F) and peak at 23°C (73°F). The month sees around 93 mm (3.7 in) of precipitation spread over 9 days, with humidity levels at 73%. In contrast, May offers significantly warmer conditions, with minimum temperatures starting at 7°C (46°F) and averaging 20°C (68°F), reaching up to a maximum of 31°C (89°F). The total precipitation in May is slightly higher at 107 mm (4.2 in), but it also lasts for 9 days, while the humidity rises to a more humid 84%. For a detailed look at March weather, check out Onomichi weather in March.
When comparing the weather in May and April, it’s evident that May tends to be warmer with an average temperature of 20°C (68°F) and a maximum of 31°C (89°F), while April has a lower average of 15°C (59°F) and a peak of 26°C (79°F). Additionally, May experiences slightly less precipitation, totaling 107 mm (4.2 in) over 9 days, compared to April's 117 mm (4.6 in) over 8 days. The humidity in May is also higher at 84%, compared to April's 74%, suggesting a more humid feel as spring progresses. For a closer look at April's weather specifics, you can refer to Onomichi weather in April.
In May, temperatures range from a cool minimum of 7°C (46°F) to a warm maximum of 31°C (89°F), with an average of 20°C (68°F). The month experiences about 107 mm (4.2 in) of precipitation over nine days, with humidity levels at 84%. In contrast, June sees a notable increase in both minimum and average temperatures, with lows of 13°C (56°F) and highs reaching 32°C (90°F), averaging around 23°C (74°F). June is also wetter, with 149 mm (5.9 in) of rainfall occurring over twelve days, while humidity slightly rises to 86%. For more detailed information, you can visit Onomichi weather in June.
In May, temperatures range from a mild minimum of 7°C (46°F) to a warm maximum of 31°C (89°F), with an average of 20°C (68°F). The month experiences about 107 mm (4.2 in) of precipitation over 9 days, accompanied by a relative humidity of 84%. In contrast, July brings significantly warmer weather, with temperatures starting at a minimum of 19°C (66°F) and reaching up to 38°C (100°F), averaging 27°C (81°F). This month is also much wetter, with 314 mm (12.4 in) of rainfall spread over 17 days, and humidity increases to around 92%. For more details on July’s weather, you can visit Onomichi weather in July.
May and August present distinctly different weather patterns. In May, temperatures range from a minimum of 7°C (46°F) to a maximum of 31°C (89°F), with an average of 20°C (68°F). The month experiences about 107 mm (4.2 in) of precipitation over 9 days, with humidity levels around 84%. In contrast, August boasts much warmer temperatures, with a minimum of 20°C (68°F) and a maximum soaring up to 37°C (99°F), resulting in an average of 29°C (85°F). Rainfall increases to 166 mm (6.5 in) across 11 days, and humidity also rises to 92%. These changes illustrate a shift towards hotter, wetter, and more humid conditions by the time August arrives. For more details, check out Onomichi weather in August.
In May, the weather tends to be milder with average temperatures around 20°C (68°F), ranging from a cool minimum of 7°C (46°F) to a warm maximum of 31°C (89°F). The month sees about 107 mm (4.2 in) of precipitation over an average of 9 days, with humidity levels at 84%. In contrast, September experiences warmer conditions with an average temperature of 25°C (77°F) and a minimum of 14°C (58°F), reaching up to 35°C (95°F) at its peak. It also tends to be wetter, receiving 174 mm (6.9 in) of precipitation over 12 days, accompanied by slightly higher humidity at 87%. For a closer look at September's climate, you can check Onomichi weather in September.
May and October each present unique weather characteristics, though they share some similarities. In May, temperatures typically range from a minimum of 7°C (46°F) to a maximum of 31°C (89°F), with an average of 20°C (68°F). The month experiences about 107 mm (4.2 in) of precipitation over approximately 9 days, accompanied by a humidity level of 84%. In contrast, October sees slightly milder temperatures, with a minimum of 8°C (46°F) and a maximum of 32°C (89°F), averaging 19°C (67°F). Precipitation increases to 164 mm (6.4 in), with the same 9 days of rainfall, and humidity rises to 85%. For more detailed insight into October weather, you can visit Onomichi weather in October.
May and November exhibit strikingly different weather patterns. In May, temperatures range from a minimum of 7°C (46°F) to a maximum of 31°C (89°F), with an average of 20°C (68°F). This month sees significant rainfall, totaling 107 mm (4.2 in) over approximately 9 days, accompanied by high humidity at 84%. In contrast, November offers a much cooler climate, with temperatures ranging from 1°C (35°F) to 24°C (75°F) and an average of 13°C (56°F). Precipitation is lighter, totaling only 31 mm (1.2 in) on about 4 days, while humidity remains steady at 84%. For more details on November weather, you can check Onomichi weather in November.
In May, temperatures range from a cool 7°C (46°F) to a warm 31°C (89°F), with an average temperature of 20°C (68°F). The month typically experiences more precipitation, totaling 107 mm (4.2 in) over about 9 days, alongside humidity levels that average 84%. In contrast, December features significantly cooler conditions, with temperatures ranging from a brisk 0°C (32°F) to a mild 20°C (69°F) and an average of just 8°C (46°F). Precipitation is lower in December, registering at 45 mm (1.8 in) over only 6 days, and the humidity is slightly lower at 82%. For more detailed insights, you can check Onomichi weather in December.
As May unfolds in Onomichi, it brings a delightful warmth that contrasts sharply with the cooler months preceding it. With average temperatures rising, the city starts to bask in the pleasant sunshine, making outdoor activities more inviting. However, this month also sees a notable amount of rainfall, with nearly a third of May days experiencing precipitation, adding a refreshing green to the landscape. The humidity peaks at a muggy 84%, which can make the air feel a bit heavy, yet this only enhances the lush vibrancy of the season. For more detailed insights into how Onomichi’s weather shapes up throughout the year, be sure to check out Onomichi Climate.