May Weather in Suwon, South Korea

Last updated: October 30, 2025

May in Suwon, South Korea presents a delightful blend of spring warmth and vibrant greenery. With maximum temperatures reaching 31°C (89°F) and an average of 18°C (64°F), residents and visitors alike enjoy the pleasant climate. However, the month also sees some variability, as temperatures can dip to a minimum of 6°C (42°F). Rainfall is moderate, with 98 mm (3.9 in) spread over approximately 8 days, contributing to the region's lush landscapes. The humidity levels hover around 81%, enhancing the overall experience of this charming city during one of the most picturesque times of the year.

May Temperature in Suwon

In Suwon, South Korea, the month of May brings a delightful shift towards warmer weather, with temperatures ranging from a minimum of 6°C (42°F) to a maximum of 31°C (89°F). The average temperature reaches a comfortable 18°C (64°F), making it an ideal time for outdoor activities and enjoying the blossoming scenery. This notable increase from the cooler April, where temperatures peak at 28°C (82°F), signals a transition into the summer months. As the days grow longer and sunnier, May sets the stage for the vibrant energy of summer, encouraging both residents and visitors to embrace the lush landscapes and cultural festivities that define this dynamic city.

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

The chart illustrates May temperature patterns in Suwon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Suwon, May typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (89°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec293244546472798071594632
Data source: Temperature data for Suwon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Suwon

May marks a significant shift in Suwon, South Korea’s climatic pattern, as it welcomes the onset of the wet season. With precipitation soaring to 98 mm (3.9 in) across 8 days, May stands out as one of the rainiest months of the year. This increase in rainfall follows a steady rise from the drier winter months—January and February recorded a mere 21 mm and 23 mm respectively—moving through the spring with larger accumulations in March and April. As summer approaches, the precipitation peaks dramatically, with months like July and August receiving an impressive 235 mm and 255 mm respectively. The trends clearly indicate that May serves as a precursor to the heavier rains that characterize the following summer months, making it a pivotal time in Suwon's climate calendar.

May Precipitation Trends in Suwon

The chart displays monthly precipitation patterns in Suwon, 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 Suwon, May typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec212347549880235256136625426
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Suwon

In Suwon, South Korea, the month of May marks a notable increase in humidity, averaging around 81%, as spring transitions into the warmer months. This rise is part of a broader trend, with humidity levels progressively climbing from 71% in January to 85% in June. Interestingly, May serves as a pivotal point as the air becomes notably thicker and more moist, setting the stage for the sweltering humidity of summer, which peaks in July and August. Overall, May’s humidity reflects the shifting climate, hinting at the impending heat while still retaining the freshness of spring.

May Average Humidity in Suwon

This chart illustrates the average monthly humidity levels in Suwon, 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 Suwon is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%65%65%75%81%85%91%91%77%79%80%74%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Suwon

As May unfolds in Suwon, South Korea, the UV Index peaks at a striking 9, categorizing it as very high and signaling an important need for sun protection. This trend continues from April’s 8, marking a noticeable escalation in UV intensity as spring transitions into summer. With a burn time of just 15 minutes, outdoor enthusiasts should be cautious during this month’s bright days. The increasing UV levels are a precursor to the extreme conditions in the upcoming summer months, which reach an Index of 11 in both July and August. It's essential to stay informed about UV exposure to enjoy the outdoors safely. For detailed information on UV levels, visit Suwon UV Index.

Maximum UV Index Levels in Suwon for May

The chart shows the monthly maximum UV Index (UVI) for Suwon 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 Suwon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891011119643
Data source: Suwon 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 Suwon

In Suwon, South Korea, May heralds the arrival of vibrant sunshine, boasting an impressive 315 hours of sunlight—the highest for the year. This surge in daylight marks a delightful transition from the cooler months, as January's 198 hours and February's 242 hours gradually give way to brighter days. By the time we reach April, days are longer and sunnier with 289 hours, setting the stage for May’s radiance. Following May, June slightly eclipses it with 318 hours, but the overall trend remains clear: as spring unfolds into summer, Suwon basks in an increasingly warm and luminous glow, creating the perfect backdrop for outdoor activities and cultural festivities.

Monthly Sunshine Duration in Suwon: May Highlighted

The May sunshine duration represents the total number of hours Suwon 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.
JanFebMarAprMayJunJulAugSepOctNovDec198h242h283h289h315h318h293h290h261h266h231h235h
Data source: Suwon May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Suwon During May

As May arrives in Suwon, South Korea, the likelihood of sunny weather dips slightly to 38%, continuing a trend observed since the warmer months began. This is in contrast to the earlier spring months, April and March, which boast slightly higher chances of sunshine at 43%. While the temperature rises, the percentage of clear skies tends to fade, suggesting that May is often marked by the transition into the humid summer months. Interestingly, this trend reflects a broader pattern seen from January through July, where the chances of sun generally fluctuate, peaking in the cooler months of late autumn and winter. As summer approaches, the anticipation of more sunny days remains, even though May might not be the sunniest month in Suwon.

Percentage of Sunny Days in May in Suwon

The chart illustrates the percentage of sunny days in Suwon 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 Suwon experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%53%43%43%39%40%30%31%39%47%57%63%
Data source: Suwon May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Suwon in May

As the year unfolds in Suwon, South Korea, daylight duration experiences a dynamic transformation, highlighting the gradual shift from winter's brevity to summer's abundance. Starting with a modest 9 hours of daylight in January, the days progressively lengthen, reaching 11 hours by March. The heart of spring brings a burst of brightness in April with 13 hours, paving the way for May's peak, where daylight stretches to 14 hours—the longest duration of the year. This richness of sunlight continues into June and July, before gradually tapering off in late summer. By August, the daylight begins to recede slightly to 13 hours, continuing this decline through September to 12 hours, and ultimately returning to 9 hours by the end of December. This rhythmic pattern not only marks the changing seasons but also enriches the daily lives of residents, inviting an array of outdoor activities as daylight flourishes in the warmer months.

Average Daylight Hours in Suwon for May

The chart illustrates the variation in daylight duration in Suwon throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 53m10h 48m11h 57m13h 9m14h 9m14h 40m14h 24m13h 32m12h 23m11h 12m10h 9m9h 37m
Data source: Suwon daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Suwon

In May, Suwon experiences a gentle embrace from the winds, with an average speed of 2.9 m/s (6 mph) that mirrors the mild breezes of April. This moderate wind pattern sets the stage for pleasant outdoor activities, as the air remains calm enough for leisurely strolls and blossoming nature walks. Following a slight dip in wind speeds in the summer months, particularly in July and August, it's interesting to note that May maintains a consistent airflow, keeping the atmosphere fresh and invigorating. As spring gracefully transitions into summer, the winds serve as a reminder of the vibrant life blooming in Suwon, contributing to a lively and refreshing backdrop for residents and visitors alike.

Average May Wind Speed in Suwon

The chart displays monthly wind speed patterns in Suwon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.13.42.72.92.9 m/s2.22.02.32.72.42.72.9
Data source: Suwon May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Suwon Compares to Other Months

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

The weather in May contrasts sharply with that of January, reflecting the transition from spring to winter. In May, temperatures range from a minimum of 6°C (42°F) to a maximum of 31°C (89°F), with an average of 18°C (64°F). The month also sees considerable precipitation, measuring 98 mm (3.9 in) over about 8 days, coupled with a high humidity level of 81%. In contrast, January experiences much colder temperatures, with highs only reaching 13°C (55°F) and lows plunging to -17°C (2°F), resulting in an average temperature of -2°C (29°F). Precipitation in January is significantly lower, totaling just 21 mm (0.8 in) over 2 days, and the humidity is comparatively lower at 71%. For more detailed information on January weather, you can visit Suwon weather in January.

The weather in May is significantly warmer and more humid compared to February. With temperatures ranging from a minimum of 6°C (42°F) to a maximum of 31°C (89°F), May offers an average warmth of 18°C (64°F). In contrast, February has much cooler temperatures, with a minimum of -15°C (4°F) and an average of 0°C (33°F), reaching a maximum of 18°C (65°F). Additionally, May experiences higher precipitation levels, with 98 mm (3.9 in) over 8 days, compared to February's 23 mm (0.9 in) over 4 days. The humidity is also notably higher in May at 81%, compared to February's 65%. For more details, check out Suwon weather in February.

Comparing the weather in May and March reveals significant differences in temperature and conditions. In March, temperatures range from a chilly -6°C (21°F) to a maximum of 21°C (70°F), with an average of just 7°C (44°F). The month experiences less precipitation, totaling 47 mm (1.9 in) over 5 days and a lower humidity level of 65%. Conversely, May sees much warmer temperatures, with a minimum of 6°C (42°F) and an average high of 31°C (89°F). Rainfall increases to 98 mm (3.9 in) over 8 days, and humidity rises to 81%, creating a much more humid environment. For a more detailed look at March weather, visit Suwon weather in March.

In comparing the weather of May and April, it’s evident that May experiences warmer temperatures overall, with a minimum of 6°C (42°F) to an average of 18°C (64°F), peaking at a high of 31°C (89°F). In contrast, April starts cooler, with temperatures ranging from a minimum of -1°C (30°F) to an average of 12°C (54°F) and a maximum of 28°C (82°F). Precipitation also increases in May, with 98 mm (3.9 in) recorded over 8 days, while April sees less rain at 54 mm (2.1 in) across just 5 days. Additionally, May has a higher humidity level at 81%, compared to April's 75%. For more detailed insights on April weather, you can check Suwon weather in April.

In comparing the weather between May and June, we see a noticeable increase in average temperatures. May experiences a minimum of 6°C (42°F) and averages around 18°C (64°F), with a maximum reaching 31°C (89°F). In contrast, June starts off warmer with a minimum of 12°C (53°F) and an average temperature of 22°C (72°F), peaking at 33°C (91°F). Additionally, June has slightly lower precipitation, with 80 mm (3.1 in) over 7 days compared to May's 98 mm (3.9 in) spread over 8 days. Humidity also increases slightly, from 81% in May to 85% in June. For more specific insights about June weather in Suwon, you can visit Suwon weather in June.

In May, temperatures in Suwon range from a cool minimum of 6°C (42°F) to an enjoyable average of 18°C (64°F), peaking at a warm 31°C (89°F). The month also sees moderate precipitation of 98 mm (3.9 in) over approximately 8 days, with humidity levels around 81%. In contrast, July brings noticeably warmer weather, with minimum temperatures of 18°C (65°F), an average of 26°C (79°F), and maximums soaring up to 36°C (98°F). However, July is also characterized by increased rainfall, accumulating 235 mm (9.3 in) over 14 days, and higher humidity of 91%. For more detailed information about the weather patterns in July, check out Suwon weather in July.

In May, the weather tends to be mild with temperatures ranging from a cool 6°C (42°F) at night to a warm 31°C (89°F) during the day, averaging around 18°C (64°F). The month sees an average precipitation of 98 mm (3.9 in) spread across about 8 days, with humidity levels sitting at 81%.

In contrast, August experiences significantly warmer weather, featuring minimum temperatures of 16°C (61°F) and maximums reaching up to 38°C (101°F), with an average of 27°C (80°F). However, it is also much wetter, with precipitation totaling 255 mm (10.1 in) over approximately 14 days, and humidity increasing slightly to 91%. The stark differences in temperature and rainfall between these two months highlight the transition from spring to the peak of summer. For more details, visit Suwon weather in August.

May and September offer distinct weather experiences, with May showcasing a wider range of temperatures, from a cool minimum of 6°C (42°F) to a warm maximum of 31°C (89°F). The average temperature in May is around 18°C (64°F), coupled with a notable humidity level of 81% and 98 mm (3.9 in) of rainfall over approximately 8 days. In contrast, September features slightly higher minimum and average temperatures, with a minimum of 9°C (48°F) and an average of 22°C (71°F), while still reaching a similar maximum of 31°C (88°F). However, September experiences more rainfall, with 136 mm (5.4 in) over 9 days and a lower humidity of 77%. This makes September feel warmer and a bit wetter than May. For more detailed information about the weather in September, you can check Suwon weather in September.

In May, temperatures in Suwon can range significantly, with lows around 6°C (42°F) and highs reaching up to 31°C (89°F), averaging 18°C (64°F). The month experiences relatively high humidity at 81% and sees about 98 mm (3.9 in) of precipitation over approximately 8 days. In contrast, October's weather is much cooler, with minimum temperatures dropping to 1°C (33°F) and maximums around 29°C (84°F), averaging 15°C (59°F). October is also characterized by lower precipitation, totaling 62 mm (2.5 in) over just 5 days and slightly drier air at 79% humidity. For more detailed information on the October weather in Suwon, you can visit Suwon weather in October.

May and November present contrasting weather conditions. In May, temperatures range from a mild 6°C (42°F) to a warm 31°C (89°F), averaging around 18°C (64°F). The humidity is quite high at 81%, and the month sees about 98 mm (3.9 in) of rainfall over roughly 8 days. In contrast, November experiences cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 21°C (70°F), leading to an average of 8°C (46°F). Precipitation drops to 54 mm (2.1 in) over just 5 days, and humidity remains relatively constant at 80%. For more details on November's climate, check out Suwon weather in November.

May and December present strikingly different weather conditions. In May, temperatures range from a minimum of 6°C (42°F) to a warm average of 18°C (64°F), with highs reaching up to 31°C (89°F). The month sees considerable precipitation, averaging 98 mm (3.9 inches) over 8 days, and humidity levels are relatively high at 81%. In contrast, December experiences much colder conditions, with temperatures dropping to a minimum of -14°C (8°F) and an average of 0°C (33°F), peaking at 13°C (56°F). Precipitation is significantly lower at 26 mm (1.0 inch) over 5 days, and humidity decreases to 74%. For more detailed insights, you can check Suwon weather in December.

Compare Suwon's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Suwon

As spring transitions into early summer, May in Suwon presents a delightful contrast to the cooler months. With a comfortable average temperature around 18°C, days can reach a maximum of 31°C, providing plenty of opportunities for outdoor activities. Unlike the chill of earlier months, May's weather is characterized by a mild warmth; however, it's also accompanied by higher humidity levels at 81%. While this month sees an uptick in precipitation, with about 8 rainy days, the overall climate remains inviting, making it a perfect time to explore the beauty of Suwon. For more detailed insights, check out Suwon Climate.