May Weather in Tsushima, Japan

Last updated: August 21, 2025

May in Tsushima, Japan showcases a temperate climate with maximum temperatures reaching 22°C (72°F) and a pleasant average of 18°C (65°F). As the month unfolds, temperatures dip to a comfortable minimum of 12°C (53°F), inviting outdoor exploration. However, visitors should be prepared for some rainfall, with 116 mm (4.6 in) of precipitation spread over approximately 8 wet days. The humidity levels hover around a notable 83%, adding a touch of tropical charm to this beautiful island’s spring ambiance.

May Temperature in Tsushima

In May, Tsushima, Japan experiences a delightful transition towards warmer weather, with temperatures reflecting the arrival of spring's full bloom. The month begins with a minimum of 12°C (53°F), rising to an average of 18°C (65°F) and peaking at a comfortable 22°C (72°F). This marks a notable increase from the cooler April temperatures, setting the stage for the warm summer months ahead. As nature awakens, the island is likely to be adorned with vibrant blossoms, inviting outdoor activities in pleasant conditions. The steady climb in temperature hints at the tropical atmosphere to come, making May an ideal time to enjoy Tsushima's scenic beauty.

May Weather in Tsushima: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Tsushima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tsushima, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec464753586470778176696050
Data source: Temperature data for Tsushima generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Tsushima

In May, Tsushima experiences a significant amount of rainfall, totaling 116 mm (4.6 in) over approximately 8 days. This steady precipitation marks a gradual decrease from the earlier months of spring, where March and April saw more substantial rainfall of 127 mm (5.0 in) and 122 mm (4.8 in), respectively. As the region transitions into early summer, the rainy season begins to intensify, evident in the notable spike in June precipitation, which jumps to 159 mm (6.3 in). This trend highlights May as a crucial period for nurturing the lush landscapes of Tsushima before the heavier rains of summer fully set in. Overall, the consistent rainfall in May contributes to the region’s rich biodiversity, setting the stage for a vibrant season ahead.

May Precipitation Trends in Tsushima

The chart displays monthly precipitation patterns in Tsushima, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Tsushima, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec68591271221161592731712961184460
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Tsushima

May in Tsushima, Japan, ushers in a notable spike in humidity, reaching 83%—the highest for the month and a precursor to the sweltering summer ahead. As winter gives way to spring, humidity levels gradually rise, reflecting the transition from cooler months: January's 72% and February's 67% are soon overshadowed by April's 75%. This gradual increase culminates in May, when the air becomes noticeably more humid, setting the stage for the summer months where humidity soars to 95% in July and remains high throughout August. The pattern highlights a clear trend of rising humidity, making May a significant indicator of the lush, tropical climate that defines Tsushima's summer.

May Average Humidity in Tsushima

This chart illustrates the average monthly humidity levels in Tsushima, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Tsushima is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%67%65%75%83%87%95%93%80%77%75%73%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Tsushima

In May, Tsushima, Japan, experiences a very high UV Index of 10, similar to April, with a burn time of just 15 minutes. This indicates an uptick in sun intensity as warmer weather settles in, making it crucial to prioritize sun protection. As spring progresses, the risk of skin damage increases markedly, demonstrating a trend towards more extreme UV levels in the upcoming months, particularly in June and July, where the UV Index rises to 11 and 12, respectively. With these changes, residents and visitors alike should remain vigilant about sun safety practices. For more detailed UV forecasts, check the Tsushima UV Index.

Maximum UV Index Levels in Tsushima for May

The chart shows the monthly maximum UV Index (UVI) for Tsushima in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Tsushima typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec457101011121210753
Data source: Tsushima May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Tsushima

In May, Tsushima, Japan, basks in an impressive 307 hours of sunshine, marking a peak in daylight as spring gives way to summer. This month stands out, not only for its abundant sunshine but also as a key transition point, following a steady increase from 193 hours in January to a vibrant 285 hours in April. The sun continues to shine brightly into June, though slightly receding to 301 hours, illustrating a gradual decline in daylight as the year progresses. Overall, the data showcases a charming trend: with each passing month from winter to late spring, Tsushima embraces longer and sunnier days, making May a particularly delightful time for outdoor adventures and scenic explorations.

Monthly Sunshine Duration in Tsushima: May Highlighted

The May sunshine duration represents the total number of hours Tsushima experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec193h236h268h285h307h301h294h313h257h258h239h233h
Data source: Tsushima May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Tsushima During May

In Tsushima, Japan, the likelihood of enjoying sunny weather in May hovers around 38%, which reflects a modest trend within the spring months. This percentage is slightly lower than the 41% chance in April and signals a continuation of relatively stable conditions, following a peak of 46% in February. As the region transitions into early summer, the chances of sunshine begin to decline, dropping to 35% in June. Overall, while May offers a good opportunity for outdoor activities under the sun, it does not stand out significantly compared to its neighboring months, embodying the characteristic variability of spring weather in Tsushima.

Percentage of Sunny Days in May in Tsushima

The chart illustrates the percentage of sunny days in Tsushima throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Tsushima experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec33%47%38%41%38%35%24%31%29%54%53%50%
Data source: Tsushima May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Tsushima in May

In Tsushima, Japan, the progression of daylight hours throughout the year reveals a captivating shift in light and time. Beginning in January and February, daylight remains steady at 10 hours, but as spring emerges in March, the sun stretches its hours to 11. This gradual increase continues into April, where daylight blossoms to 13 hours. May maintains this brightness, setting a vibrant stage for the onset of summer, which peaks in June and July with a generous 14 hours of sunlight. As the seasons transition back to autumn, daylight slowly recedes, dropping to 12 hours in September and further down to 10 hours in November and 10 hours in December, concluding the year with the least light. This rhythmic ebb and flow of daylight not only signals seasonal changes but also enriches the vibrant life of Tsushima.

Average Daylight Hours in Tsushima for May

The chart illustrates the variation in daylight duration in Tsushima throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 8m10h 56m11h 58m13h 2m13h 56m14h 22m14h 9m13h 22m12h 21m11h 18m10h 22m9h 54m
Data source: Tsushima daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Tsushima

In May, the winds in Tsushima, Japan begin to mellow, with an average speed of 6.9 m/s (15 mph), marking a noticeable decline from the brisker gusts of the earlier months. This gentle shift in wind patterns is part of a broader trend throughout the spring, where average wind speeds gradually decrease from January's robust 8.4 m/s to April's 7.3 m/s. As the island transitions into summer, the winds become even calmer, dropping further to 5.0 m/s in June. This reduction creates a softer atmosphere, perfect for enjoying the blooming nature and vibrant scenery that accompany the arrival of warmer days. Despite the calming breezes, May still retains enough freshness to invigorate the senses, providing a delightful balance between the lively spring winds and the serene summer air.

Average May Wind Speed in Tsushima

The chart displays monthly wind speed patterns in Tsushima, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec8.48.37.77.36.9 m/s5.06.16.27.56.07.67.8
Data source: Tsushima May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Tsushima Compares to Other Months

Weather in Tsushima varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Tsushima, focusing on differences in temperature, rainfall, humidity, and UV levels.

In May, temperatures average around 18°C (65°F), with a comfortable range between 12°C (53°F) and 22°C (72°F), making it a pleasant month for outdoor activities. However, it also experiences higher precipitation levels, with 116 mm (4.6 in) of rain over approximately 8 days, contributing to a humidity of 83%. In contrast, January presents a cooler climate, with an average temperature of 8°C (47°F) and a range from -2°C (28°F) to 19°C (66°F). This month sees less precipitation, totaling 68 mm (2.7 in) but maintains similar rainy days at 8, with a lower humidity of 72%. For more detailed information, you can check out Tsushima weather in January.

In comparing the weather of May and February, significant contrasts emerge. May showcases a mild climate with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 22°C (72°F), fostering a comfortable atmosphere complemented by higher humidity levels at 83%. This month also experiences more precipitation, totaling 116 mm (4.6 in) over 8 days, indicating a transition into the wetter season. In contrast, February presents a much cooler environment, with average temperatures between -1°C (31°F) and 17°C (62°F). The precipitation is notably lower, at 59 mm (2.3 in) over the same number of days, and humidity is at 67%. For more specific insights into February's climate, you can explore Tsushima weather in February. Overall, May's warmer and wetter conditions starkly differ from February's chillier and drier weather.

In comparing the weather of May and March, May typically enjoys milder temperatures, with averages around 18°C (65°F), peaking at 22°C (72°F), while March has cooler averages of 12°C (54°F) and a maximum of 17°C (64°F). Precipitation levels are somewhat similar, with March experiencing slightly higher rainfall at 127 mm (5.0 in) over 10 days, compared to May's 116 mm (4.6 in) over 8 days. Additionally, humidity levels are notably higher in May at 83%, compared to a more comfortable 65% in March. For more specific details, you can refer to Tsushima weather in March.

In comparing the weather between April and May, we see a noticeable warming trend as May typically experiences a minimum temperature of 12°C (53°F) and an average of 18°C (65°F), compared to April's lower minimum of 7°C (45°F) and an average of 15°C (58°F). While April has slightly less precipitation at 122 mm (4.8 in), compared to May's 116 mm (4.6 in), both months see rainfall on about 8 days. Additionally, May tends to be more humid, with humidity levels reaching 83%, whereas April's humidity is at 75%. For a detailed look at the conditions in April, you can check Tsushima weather in April. Overall, May offers warmer temperatures and increased humidity, making it a more pleasant month for outdoor activities.

In comparing the weather between May and June, we see a noticeable increase in temperatures. May experiences a minimum of 12°C (53°F) and an average of 18°C (65°F), while June starts with a higher minimum of 17°C (64°F) and averages 21°C (70°F). The maximum temperatures also rise, with May reaching up to 22°C (72°F) compared to June's 25°C (77°F). However, June brings more precipitation, totaling 159 mm (6.3 in) over 9 days, compared to May's 116 mm (4.6 in) over 8 days. Humidity slightly increases as well, from 83% in May to 87% in June. For more details about the weather in June, you can check Tsushima weather in June.

In May, the weather tends to be mild, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 22°C (72°F) and an average of 18°C (65°F). Although there's considerable rainfall, averaging 116 mm (4.6 in) over about 8 days, the humidity is a manageable 83%. In contrast, July brings much warmer temperatures, with a minimum of 21°C (69°F) and a maximum reaching 30°C (86°F), averaging 25°C (77°F). However, July also sees a significant increase in precipitation, totaling 273 mm (10.8 in) across about 14 days, and the humidity rises to a steamy 95%. For more detailed insights on July weather in Tsushima, you can visit Tsushima weather in July.

May and August present notably different weather patterns. In May, temperatures range from a minimum of 12°C (53°F) to a maximum of 22°C (72°F), with an average temperature of 18°C (65°F). This month experiences moderate rainfall with 116 mm (4.6 in) over about 8 days, accompanied by a relatively high humidity of 83%.

In contrast, August sees warmer conditions, with minimum temperatures at 23°C (73°F) and maximums reaching up to 31°C (87°F). The average temperature rises to 27°C (81°F), and precipitation increases to 171 mm (6.7 in) over 13 days, leading to even higher humidity levels at 93%. For more detailed insights into August weather, you can explore Tsushima weather in August.

May and September present distinct weather patterns that reflect the transitioning seasons. In May, temperatures range from a mild 12°C (53°F) at night to a pleasant average of 18°C (65°F) during the day, peaking at 22°C (72°F). This month sees a moderate amount of rain, with 116 mm (4.6 in) falling over about 8 days, and humidity levels are relatively high at 83%.

In contrast, September experiences warmer temperatures, with minimums of 19°C (67°F) and daytime averages reaching 24°C (76°F), culminating in maximums of 29°C (85°F). However, this month is significantly wetter, as it receives 296 mm (11.7 in) of precipitation over approximately 14 days, coupled with slightly lower humidity at 80%. These differences illustrate the marked climatic shift from early spring to early autumn. For more details, check Tsushima weather in September.

In May, the weather is characterized by mild temperatures, with the minimum hovering around 12°C (53°F) and an average of 18°C (65°F), peaking at 22°C (72°F). The month sees significant precipitation, totaling 116 mm (4.6 in) over about 8 days, combined with relatively high humidity at 83%. In contrast, October offers slightly warmer conditions, with an average temperature of 20°C (69°F) and a maximum reaching 27°C (80°F), while maintaining the same minimum of 12°C (55°F). Precipitation levels are comparable, at 118 mm (4.7 in) across 9 days, but the humidity is noticeably lower at 77%. For more details on the specific conditions during this time, you can check Tsushima weather in October.

May and November present markedly different weather experiences. In May, temperatures range from a minimum of 12°C (53°F) to a pleasant average of 18°C (65°F), peaking at a maximum of 22°C (72°F). This month is relatively wet, receiving 116 mm (4.6 in) of precipitation over eight days, coupled with a high humidity level of 83%. In contrast, November features cooler temperatures, with a minimum of 6°C (44°F) and an average of 16°C (60°F), while still reaching a maximum of 22°C (72°F). The precipitation significantly drops to 44 mm (1.7 in) over the same number of rainy days, and the humidity decreases to 75%. For more detailed weather insights, you can visit Tsushima weather in November.

May and December present quite contrasting weather conditions. In May, temperatures are generally milder, with average highs reaching 22°C (72°F) and a notable humidity level of 83%. Rainfall is also significant during this month, with around 116 mm (4.6 inches) falling over approximately 8 days, contributing to a lush, vibrant landscape.

In contrast, December experiences cooler temperatures, with an average high of 20°C (69°F) and lows dipping down to 0°C (33°F). The precipitation is less intense at 60 mm (2.4 inches) over about 7 days, and humidity drops to 73%, creating a drier atmosphere. For more detailed information, you can check Tsushima weather in December.

Compare Tsushima's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Tsushima

As spring fully unfolds, May brings mild temperatures to Tsushima, offering a pleasant respite compared to the chillier months of early spring. With an average temperature hovering around 18°C, outdoor enthusiasts can relish comfortable days perfect for exploring the island. However, be prepared for some rain, as May typically sees a mix of sunshine and showers, with approximately eight days of precipitation contributing to the lush green scenery. The relatively high humidity of 83% can make the air feel a bit sticky, but it also enhances the vibrant atmosphere of the season. For those curious about what to expect throughout the year, more details can be found in our comprehensive guide to Tsushima Climate.