May Weather in Kalymnos, Greece

Last updated: August 21, 2025

May in Kalymnos, Greece welcomes visitors with mild temperatures and delightful weather. The maximum temperature reaches a pleasant 24°C (75°F), while the average hovers around 19°C (67°F), making it ideal for outdoor activities. With a minimum of 15°C (60°F), evenings remain comfortably cool. Notably, rain is nearly absent, with just 4 mm (0.1 in) of precipitation expected over 0 days, allowing for uninterrupted exploration of the island’s stunning landscapes. The humidity level at 81% adds a refreshing touch to the warm breezes, perfect for enjoying Kalymnos' beautiful beaches and historic sites.

May Temperature in Kalymnos

In May, Kalymnos, Greece, begins to shed its spring attire and welcome the warmth of approaching summer. With minimum temperatures rising to 15°C (60°F) and averaging 19°C (67°F), the island transforms into a pleasant escape, marked by maximum highs of 24°C (75°F). This month not only offers noticeably warmer days compared to the cooler previous months, but it also sets the stage for the steadily rising temperatures that will follow in June and beyond. The refreshing climate makes May an ideal time for outdoor adventures and soaking up the vibrant Mediterranean atmosphere, as the island buzzes with life and color in preparation for the summer season.

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

The chart illustrates May temperature patterns in Kalymnos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kalymnos, 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).
JanFebMarAprMayJunJulAugSepOctNovDec555757616773777875706660
Data source: Temperature data for Kalymnos 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 Kalymnos

In May, Kalymnos experiences a striking transition towards summer, with precipitation plummeting to just 4 mm (0.1 in), marking a significant decline from the preceding months. This change is notable considering that throughout January to April, rainfall had been comparatively abundant, with January alone receiving 150 mm across 13 days. By May, however, the island enjoys clear skies and sunshine, as it transitions into a dry spell, with zero recorded precipitation days. This trend sets the tone for the upcoming summer months, where the island remains largely arid, showing that May serves as a turning point into the typically sun-soaked Mediterranean climate of Kalymnos.

May Precipitation Trends in Kalymnos

The chart displays monthly precipitation patterns in Kalymnos, 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 Kalymnos, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec150977530440043887179
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Kalymnos

In Kalymnos, Greece, the humidity begins to rise noticeably in May, reaching 81%, which marks a peak for the spring season. This increase signals the transition into the warmer months, contrasting with the more stable humidity levels of around 77% observed from January through April. Following May, humidity levels dip to 77% in June and continue their decline through the summer, where they hit a comfortable low of 66% in August. As autumn approaches, humidity rebounds slightly, settling into the 70s again. This trend highlights Kalymnos's dynamic climate, where spring brings a vibrant increase in moisture, setting the stage for the drier, sunnier days of summer.

May Average Humidity in Kalymnos

This chart illustrates the average monthly humidity levels in Kalymnos, 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 Kalymnos is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%77%77%81%77%72%66%70%76%77%78%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Kalymnos

In May, Kalymnos, Greece experiences a notable rise in UV Index, reaching a peak of 10, which falls into the very high exposure category. This surge marks a significant transition from the previous months, as April's UV Index was already a high 8. With a burn time of just 15 minutes, sun safety becomes crucial, urging locals and visitors alike to seek shade or apply sunscreen frequently. As the summer approaches, the UV levels remain elevated, highlighting the need for vigilance during outdoor activities. To stay informed about the UV Index fluctuations throughout the year, check out Kalymnos UV Index.

Maximum UV Index Levels in Kalymnos for May

The chart shows the monthly maximum UV Index (UVI) for Kalymnos 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 Kalymnos typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101010108643
Data source: Kalymnos 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 Kalymnos

In Kalymnos, Greece, May ushers in a vibrant shift, showcasing a remarkable 403 hours of sunshine that set the stage for the summer months ahead. As spring unfolds, the increasing daylight becomes evident, with May experiencing a notable rise from April's 353 hours. This trend of growing sunshine continues seamlessly into June and July, where sunshine peaks at 425 hours. The gradual buildup from a chilly January with just 214 hours accentuates the island’s alluring transformation, transitioning from winter's restraint to the warmth of summer's embrace. As summer gives way to fall, the sunshine begins to wane but remains generous through September and October, ensuring Kalymnos remains a bright escape for sun seekers throughout the year.

Monthly Sunshine Duration in Kalymnos: May Highlighted

The May sunshine duration represents the total number of hours Kalymnos 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.
JanFebMarAprMayJunJulAugSepOctNovDec214h271h334h353h403h412h425h396h350h326h277h268h
Data source: Kalymnos May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Kalymnos During May

In Kalymnos, Greece, the likelihood of sunny weather in May reaches an impressive 78%, marking a significant increase from the preceding months. This trend reflects the gradual warming as spring transitions into summer, with May standing out as a particularly favorable time for sun-seekers. As temperatures rise and the days lengthen, it’s clear that locals and visitors alike can anticipate more bright, sunlit days. Following May, the sun's presence becomes nearly constant, with June soaring to 94% and July and August nearing a perfect 99%. This progression not only highlights Kalymnos as a prime destination in the late spring but also sets the stage for a sun-drenched summer ahead.

Percentage of Sunny Days in May in Kalymnos

The chart illustrates the percentage of sunny days in Kalymnos 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 Kalymnos experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec39%67%68%55%78%94%99%100%96%80%48%44%
Data source: Kalymnos May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Kalymnos in May

As spring unfolds in Kalymnos, Greece, the daylight gradually blooms, creating an inviting atmosphere that sets the stage for the summer months ahead. January begins with a modest 9 hours of daylight, which steadily increases to 10 hours in February and reaches 11 hours in March. By April, the days stretch to 13 hours, heralding the vibrant arrival of May with an impressive 14 hours of sunlight—the same duration that will linger through June and July. This consistent daylight enables residents and visitors alike to fully embrace the island's outdoor beauty. As summer gives way to autumn, daylight gently recedes, tapering to 13 hours in August before settling into a more subdued 12 hours in September and gradually reducing to 10 hours in November. This rhythmic ebb and flow of daylight reflects the island's captivating seasonal transformation, inviting all to relish the warmth and beauty of each day.

Average Daylight Hours in Kalymnos for May

The chart illustrates the variation in daylight duration in Kalymnos throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 55m10h 49m11h 58m13h 9m14h 8m14h 38m14h 22m13h 30m12h 22m11h 12m10h 10m9h 39m
Data source: Kalymnos daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Kalymnos

In Kalymnos, Greece, the winds of May offer a gentle respite after a breezy start to the year. With an average wind speed of 6.2 m/s (14 mph), May marks a noticeable dip from the more robust winds experienced in the earlier months. Following the peak winds of 8.5 m/s (19 mph) in March, the air becomes softer and more inviting, setting the stage for outdoor adventures and leisurely days by the sea. As summer approaches, June sees a slight uptick to 7.7 m/s (17 mph), suggesting a pattern where late spring brings milder breezes before the winds gain strength again in July and August. This trend emphasizes May as a transitional month, perfectly balancing wind with blissful Mediterranean warmth.

Average May Wind Speed in Kalymnos

The chart displays monthly wind speed patterns in Kalymnos, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8.38.38.58.46.2 m/s7.78.48.28.06.46.18.4
Data source: Kalymnos May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Kalymnos Compares to Other Months

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

May and January exhibit stark contrasts in weather conditions. In May, temperatures range from a pleasant 15°C (60°F) at their lowest to a warm 24°C (75°F) at their peak, with an average temperature of around 19°C (67°F). The month is relatively dry, with only 4 mm (0.1 in) of precipitation and no rainy days, making it a great time for outdoor activities. In contrast, January experiences much cooler weather with minimum temperatures dropping to 5°C (42°F) and maximums reaching only 19°C (66°F), providing an average of 13°C (56°F). It is also quite wet, with a substantial 150 mm (5.9 in) of rainfall spread over 13 days. Despite the lower humidity at 77% compared to May's 81%, the chilly temperatures and frequent rain make January feel quite different. For more details, check Kalymnos weather in January.

May and February present distinctly different weather patterns. In May, temperatures are generally milder, with a minimum of 15°C (60°F) and an average of 19°C (67°F), peaking at 24°C (75°F). The month is characterized by minimal precipitation, receiving only 4 mm (0.1 in) across no rainy days and maintaining a relatively high humidity of 81%. In contrast, February experiences cooler temperatures, ranging from a minimum of 5°C (41°F) to a maximum of 19°C (66°F) with an average of 14°C (57°F). It is also much wetter, accumulating 97 mm (3.8 in) of rainfall over 10 days and a slightly lower humidity of 76%. For more details, you can check Kalymnos weather in February.

When comparing the weather in May and March, it’s clear that May offers a more temperate climate. May boasts an average temperature of 19°C (67°F), with highs reaching 24°C (75°F) and very little precipitation, only 4 mm over the month and no rainy days. In contrast, March features cooler temperatures, averaging around 14°C (58°F), with a maximum of just 18°C (65°F), and significantly more rainfall totaling 75 mm across 7 rainy days. Additionally, humidity levels are slightly higher in May at 81%, compared to 77% in March. For a deeper look at March weather, check out Kalymnos weather in March.

In comparing the weather of April and May, it's clear that May offers warmer temperatures with a minimum of 15°C (60°F) and an average of 19°C (67°F), compared to April's minimum of 10°C (50°F) and average of 16°C (61°F). Additionally, May boasts significantly less precipitation, with just 4 mm (0.1 in) over 0 days, whereas April experiences 30 mm (1.2 in) across 4 days, leading to a drier climate as spring progresses. Humidity levels also rise slightly in May to 81%, compared to April's 77%. For a more detailed look at April's weather, you can visit Kalymnos weather in April.

May and June present a gradual transition in weather, with June typically being warmer. In May, temperatures range from a minimum of 15°C (60°F) to a maximum of 24°C (75°F), with an average of 19°C (67°F) and a humidity level of 81%. Rainfall is minimal, with no recorded precipitation days. In contrast, June sees slightly higher temperatures, with a minimum of 16°C (61°F), an average of 23°C (73°F), and a maximum of 27°C (82°F). Although June experiences a bit more humidity at 77% and a single day of precipitation totaling 4 mm (0.1 in), it still maintains a generally dry profile. For more detailed insights, you can check Kalymnos weather in June.

In May, temperatures in Kalymnos are generally milder, with a range from a minimum of 15°C (60°F) to a maximum of 24°C (75°F), and an average of 19°C (67°F). This month experiences some humidity at 81% and light precipitation of about 4 mm, although it typically sees no rainy days. In contrast, July brings warmer and drier conditions, featuring temperatures that range from a minimum of 22°C (71°F) to a maximum of 29°C (84°F), with an average of 25°C (77°F). July is characterized by a complete absence of rainfall and a lower humidity level at 71%. For more detailed information, you can check Kalymnos weather in July.

The weather in May features milder temperatures, with a minimum of 15°C (60°F) and an average of 19°C (67°F), reaching a maximum of 24°C (75°F). Additionally, May sees minimal precipitation, averaging just 4 mm (0.1 in) with no rainy days, but the humidity is relatively high at 81%. In contrast, August experiences warmer conditions, boasting a minimum temperature of 23°C (73°F), an average of 25°C (78°F), and a maximum of 29°C (85°F). Notably, August is completely dry, with no recorded precipitation and lower humidity at 66%. For more details about the weather in August, you can check out Kalymnos weather in August.

In May, the weather is characterized by milder temperatures, with daily averages around 19°C (67°F) and a maximum of 24°C (75°F). The humidity is relatively high at 81%, but the month enjoys almost no rainfall, making it a great time for outdoor activities. In contrast, September boasts warmer temperatures, with a minimum of 19°C (66°F) and an average high reaching 28°C (83°F). Despite its slightly lower humidity of 70%, September also experiences very little precipitation, providing excellent conditions for exploration. For more insights into September weather, you can check Kalymnos weather in September.

May and October present a delightful transition in weather patterns. In May, temperatures range from a mild 15°C (60°F) to a pleasant 24°C (75°F), with low humidity at 81% and virtually no precipitation, making it an ideal time for outdoor activities. In contrast, October offers slightly warmer average temperatures, peaking at 25°C (77°F), but comes with increased moisture, evidenced by 38 mm (1.5 in) of rain over about four days. Despite this, the lower humidity at 76% still maintains a comfortable atmosphere. For more details on October weather, you can visit Kalymnos weather in October.

In May, the weather is characterized by milder temperatures, with a minimum of 15°C (60°F) and a pleasant average of 19°C (67°F), peaking at 24°C (75°F). The month sees minimal precipitation, with only 4 mm recorded over zero rainy days and an average humidity of 81%. In contrast, November presents a cooler climate, with temperatures slightly dropping to a minimum of 12°C (53°F) and a similar average of 19°C (66°F), while the maximum reaches 23°C (74°F). However, this month experiences significantly more rainfall, totaling 87 mm over eight days, and slightly lower humidity at 77%. For more detailed information, check out Kalymnos weather in November.

May and December present quite contrasting weather conditions. In May, temperatures are pleasantly warm, with averages around 19°C (67°F), peaking at 24°C (75°F), and the month sees minimal precipitation, with just 4 mm falling over 0 days. Humidity levels are relatively high at 81%, contributing to a comfortable environment for outdoor activities. In stark contrast, December experiences cooler temperatures, ranging from a minimum of 9°C (48°F) to an average of 15°C (60°F) and a maximum of 21°C (69°F). This month is significantly wetter, with 179 mm of rainfall spread over 15 days and humidity levels slightly lower at 78%. For a more detailed look at December's weather in Kalymnos, visit Kalymnos weather in December.

Compare Kalymnos's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Kalymnos

As May graces Kalymnos, the island transitions into a delightful spring, showcasing pleasant temperatures that average around 19°C (67°F) with maximums reaching up to 24°C (75°F). This month stands out due to its remarkably low precipitation, boasting 0 rainy days and only 4 mm of rainfall, making it perfect for outdoor activities and exploration. The increased humidity at 81% feels refreshing rather than stifling, creating ideal conditions for enjoying the stunning landscapes and charming scenery. If you're curious to learn more about the island's weather trends, check out Kalymnos Climate.