May · Turkey
Best time to visit Istanbul in May Weather, crowds & prices
Weather in Istanbul in May
Average temperature 17°C, 57 mm of rain, about 27 days with 6+ hours of sunshine and 73% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
9.1/10
Ranked #3 of 12 months
- Avg temp
- 17°C
- Rainfall
- 57 mm
- Humidity
- 73%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Istanbul scores 9.1/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 17°C, 57 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Bosphorus ferries and storied quarters shine brightest in mild April through June.
May is one of the strongest months in Istanbul (3rd)
May averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 57 mm, so plan one flexible day in three; you still get about 27 days with 6+ hours of sunshine and 14.5 hours of daylight.
A 9.1/10 puts this among the year's best months in Istanbul (3rd of 12); only June scores higher, at 9.4/10.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Plan for mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Istanbul in May?
- In May, Istanbul averages 17°C, 57 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 9.1/10.
- Is May a good time to visit Istanbul?
- May earns a 9.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Istanbul in May?
- Expect about 57 mm of rain in May. Average humidity is 73% and there are about 27 days with 6+ hours of sunshine.
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