Last updated: August 27, 2025
May in Istanbul is a delightful blend of warm temperatures and vibrant springtime vibes. With maximums reaching 27°C (82°F) and an average of 17°C (63°F), this month invites residents and visitors alike to bask in the pleasant weather. However, be prepared for the occasional rain, as 50 mm (2.0 in) of precipitation is spread over about 8 rainy days. The air carries a notable humidity level of 77%, creating a refreshing atmosphere throughout the city. Whether you enjoy wandering through historic streets or relaxing in lush gardens, May presents a beautiful backdrop for experiencing all that Istanbul has to offer.
In May, Istanbul experiences a delightful transition into warmer weather, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 27°C (82°F). This month marks a significant increase from the cooler spring months, boasting an average temperature of 17°C (63°F), which invites residents and visitors alike to embrace outdoor activities and enjoy the city's vibrant atmosphere. As the days grow longer and sunnier, May serves as a perfect precursor to the summer heat, making it an ideal time to wander through Istanbul's historic sites or relax by the Bosporus. With the comfortable warmth and budding greenery, May truly showcases the charm of this captivating city as it awakens from its winter slumber.
In May, Istanbul experiences a charming blend of mild weather and gentle rains, marked by an average precipitation of 50 mm (2.0 in) distributed over 8 days. This is a slight increase compared to April's 49 mm, reflecting the transition into warmer months while still benefiting from refreshing showers. As spring unfolds, the city enjoys a balance between sun-drenched days and occasional drizzles, setting the stage for vibrant outdoor activities. Notably, this month acts as a precursor to the drier summer months ahead, while also contributing to the city's lush landscapes, making May a delightful time to explore Istanbul’s parks and gardens.
In May, Istanbul experiences a humidity level of 77%, which reflects a subtle dip from the wetter months of winter and early spring. This trend indicates a gradual transition towards the drier summer months ahead, as humidity rates decrease significantly in June to 70%. The pleasant balance of warmth and moisture in May creates an inviting climate for both locals and tourists, fostering a lively atmosphere throughout the city. As the vibrant blooms of spring begin to fade, May serves as a gentle reminder of the beautiful transformation leading into the sun-soaked days of summer.
As the month of May approaches, Istanbul experiences a notable shift in its UV Index, soaring to 8, which falls into the very high exposure category. This marked increase from April’s 7 signals that sun protection becomes crucial, with a significantly reduced burn time of just 15 minutes. The trend highlights a transition into the summer months, where UV levels remain elevated, peaking in June. As daylight grows longer and stronger, both locals and visitors should take heed of the rising UV Index; after May, July and August continue to show levels of 9, so planning sun safety is essential. To stay informed about the UV index throughout the year, check out Istanbul UV Index.
UV Risk Categories
May in Istanbul is a splendid showcase of sunshine, with an impressive 401 hours of radiant daylight illuminating the city's historic streets and vibrant culture. This month marks a peak in the gradual increase of sunlight that begins in January with a modest 159 hours. As spring unfolds, the sunshine steadily climbs, reaching its zenith in May before transitioning into the sultry days of summer. The warm embrace of the sun in May not only signals the onset of a lively season but also invites locals and tourists alike to bask in the beauty of Istanbul’s parks, waterfronts, and captivating architecture. As the sun continues to shine brighter through June and July, the city becomes a canvas of light, perfectly complementing its rich tapestry of history and life.
As spring unfolds in Istanbul, the likelihood of sunny weather significantly increases, with May boasting a promising 57% chance of sunshine. This marks a notable rise from the cooler months of the year, where January and February linger below 45%. By April, the trend continues upward, reaching 43%, but it is in May that the city truly begins to bask in the warm embrace of the sun. Following May, the sunshine percentage climbs even higher in June and July, peaking at an impressive 79% and 82%, respectively. This steady progression not only signifies the arrival of summer but also invites both locals and tourists to revel in outdoor activities against Istanbul’s beautiful backdrop.
As spring unfolds in Istanbul, May brings a delightful increase in daylight, offering 14 hours of sunshine. This follows a gradual rise from 9 hours in January, signaling the end of winter's gloom. The trend of longer days continues into June, where daylight peaks at 15 hours, creating an inviting atmosphere for outdoor activities and cultural exploration. As summer transitions to fall, daylight begins to wane, with July and August seeing a slight drop to 14 and 13 hours, respectively. By the time October arrives, daylight slips back to 11 hours and continues to decline into the winter months. Each change in daylight not only marks the passage of seasons but also enhances the vibrant life of the city, making every month a unique experience in this bustling metropolis.
In Istanbul, the month of May often heralds the transition to warmer days, but the average wind speed of 4.0 m/s (9 mph) suggests a slight calm amidst the city's bustling energy. This gentle breeze marks a notable decrease from the previous months, particularly April's 4.1 m/s, and offers a moment of respite as the temperature begins to rise. As summer approaches, it’s interesting to note that the winds typically pick up in July and August, both averaging 4.4 m/s (10 mph). Overall, May serves as a delicate interlude, where the city's famous charm is complemented by a tranquil atmosphere, setting the stage for the vibrant summer ahead.
Weather in Istanbul varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Istanbul, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January exhibit strikingly different weather patterns. In May, temperatures range from a cool 8°C (46°F) at night to a warm 27°C (82°F) during the day, with an average of 17°C (63°F). The month experiences approximately 50 mm (2.0 in) of precipitation over about 8 days, accompanied by a humidity level of 77%. In contrast, January is much colder, with temperatures dipping to a minimum of -3°C (27°F) and peaking at 16°C (62°F), averaging around 7°C (45°F). This winter month sees more considerable rainfall, totaling 102 mm (4.0 in) over 13 days, along with a higher humidity of 84%. For a closer look at the January climate, check out Istanbul weather in January.
When comparing the weather in May and February, it's clear that May offers a much warmer experience. Average temperatures in May reach 17°C (63°F), with highs of 27°C (82°F), while February's average is a cooler 8°C (46°F), peaking at 17°C (62°F). Precipitation is slightly lower in May, with 50 mm (2.0 in) over about 8 days compared to February's 66 mm (2.6 in) spread over 12 days. Additionally, May experiences lower humidity at 77% compared to February's 84%, creating a more comfortable atmosphere as spring unfolds. For more detailed insights, you can check out Istanbul weather in February.
In comparing the weather of March and May, there is a notable shift in temperatures and conditions. March experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (47°F), while May sees more pleasant warmth, ranging from a minimum of 8°C (46°F) to an average of 17°C (63°F). Precipitation is higher in March, totaling 82 mm (3.2 in) over 12 days, compared to May's 50 mm (2.0 in) over just 8 days, indicating that May tends to be drier. Furthermore, humidity levels are slightly higher in March at 83%, while May's humidity sits at 77%. For those interested in the details of March weather, you can find more information here: Istanbul weather in March.
In comparing the weather of May and April, we see a notable increase in temperatures. May features a minimum temperature of 8°C (46°F) and averages around 17°C (63°F), peaking at 27°C (82°F), whereas April has a cooler minimum of 4°C (40°F) and an average of 12°C (53°F), with a maximum of 23°C (73°F). Both months experience similar precipitation levels, with May seeing 50 mm (2.0 in) and April having slightly less at 49 mm (1.9 in), each with rain over 8 days. Humidity remains relatively consistent, with May at 77% and April at 76%. For more details on April's weather, you can visit Istanbul weather in April.
May and June in Istanbul exhibit a noticeable shift in weather patterns. In May, average temperatures range from a minimum of 8°C (46°F) to a maximum of 27°C (82°F), with an average temperature of 17°C (63°F). The month experiences about 50 mm (2.0 in) of precipitation over 8 days, coupled with relatively high humidity at 77%. In contrast, June brings warmer temperatures, with a minimum of 13°C (56°F), an average of 22°C (71°F), and a maximum of 30°C (86°F). Precipitation decreases slightly to 40 mm (1.6 in) over 7 days, and humidity levels drop to 70%. This transition highlights the onset of summer, characterized by warmer and drier conditions. For more detailed insights on June's weather, check out Istanbul weather in June.
May and July present distinct contrasts in weather. In May, temperatures range from a cool 8°C (46°F) to a pleasant 27°C (82°F), with an average temperature of 17°C (63°F). The month experiences about 50 mm (2.0 in) of precipitation over 8 days, contributing to a higher humidity level of 77%. In comparison, July heats up significantly, showing temperatures from a minimum of 18°C (65°F) to a scorching maximum of 33°C (92°F), averaging around 24°C (76°F). Precipitation slightly increases to 53 mm (2.1 in) but occurs over only 5 days, leading to a drier atmosphere with humidity dropping to 63%. For more detailed insights on the July weather in Istanbul, check out Istanbul weather in July.
May and August present notably different weather patterns. In May, temperatures range from a cool minimum of 8°C (46°F) to a moderate maximum of 27°C (82°F), with an average of 17°C (63°F). The month experiences around 50 mm (2.0 in) of rainfall over 8 days, accompanied by a higher humidity level of 77%. In contrast, August boasts warmer temperatures, with a minimum of 19°C (66°F) and a maximum reaching up to 34°C (93°F), averaging 25°C (77°F). Precipitation is significantly lower at just 18 mm (0.7 in) over 3 days, and humidity drops to a more comfortable 55%. For more detailed information, check out Istanbul weather in August.
May and September present contrasting weather patterns. In May, temperatures range from a chilly minimum of 8°C (46°F) to a pleasant average of 17°C (63°F), peaking at 27°C (82°F). The month is relatively humid, with an average humidity of 77% and about 50 mm (2.0 in) of precipitation occurring over 8 days. In contrast, September enjoys warmer conditions, with minimum temperatures starting at 13°C (57°F) and averaging 22°C (72°F), reaching up to a maximum of 32°C (90°F). Precipitation decreases to 36 mm (1.4 in) over 6 days, and humidity drops to 60%, making for a more comfortable atmosphere. For more details on September's climate, check out Istanbul weather in September.
May and October exhibit similar temperature ranges, with May offering a slightly warmer average of 17°C (63°F) compared to October's 18°C (64°F). Both months experience a maximum temperature of around 27-28°C (82°F), highlighting a consistent climate as summer transitions into autumn. Precipitation levels are relatively close, with May receiving 50 mm (2.0 in) and October slightly increasing to 56 mm (2.2 in), both spread over approximately 8 days. Humidity is marginally higher in May at 77% compared to October's 73%, contributing to a more refreshing feel in the fall. For a more detailed look at October's weather, you can visit Istanbul weather in October.
In May, the weather is generally warmer with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 27°C (82°F), offering pleasant conditions for outdoor activities. The month sees around 50 mm of precipitation over approximately 8 days, accompanied by a humidity level of 77%. In contrast, November's climate is cooler, with average temperatures ranging from a minimum of 7°C (44°F) to a maximum of 22°C (72°F). This month experiences slightly more rainfall, totaling about 63 mm across around 10 days, along with a humidity level of 82%. The transition from May’s warmth to November’s cooler and wetter atmosphere brings a noticeable shift in the weather dynamic. For more detailed information, you can check Istanbul weather in November.
May and December present stark contrasts in weather patterns. In May, temperatures range from a pleasant minimum of 8°C (46°F) to a warm maximum of 27°C (82°F), with an average of 17°C (63°F). Rainfall is relatively light at 50 mm (2.0 in) over about 8 days, contributing to a humidity level of 77%. In contrast, December experiences cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 18°C (64°F), averaging only 10°C (50°F). Precipitation increases significantly to 108 mm (4.2 in) over 15 days, resulting in a higher humidity of 85%. For more details on weather conditions during this month, check out Istanbul weather in December.
As May unfolds in Istanbul, the city experiences a delightful shift from the cooler days of spring to a more temperate climate, making it a prime time for exploration. With average temperatures rising to a comfortable 17°C, visitors can enjoy outdoor activities without the sweltering heat of summer. While occasional rain graces the month, bringing about 50 mm of precipitation over roughly 8 days, the overall atmosphere remains vibrant and inviting, perfectly balanced by 77% humidity. This combination sets May apart from both the chill of early spring and the heat of summer, making it an ideal time to soak in the rich culture and history of this enchanting city. For a deeper insight into Istanbul's climate nuances, explore Istanbul Climate.