Avg high
21°C
Avg low
14°C
Rainfall
53 mm
Rain days
8.8
Sunshine
11.8 h/day
Daylight
14.3 h
What to pack for Istanbul in May
- t-shirts and light layers
- a light jacket for evenings
- a packable rain layer
Humidity averages 76%; max daily wind around 21 km/h.
How May compares
Best months in Istanbul: May–October. See the full best time to visit Istanbul guide.
Istanbul in May: the details
In May, Istanbul sees average daytime highs of 21°C (70°F) and overnight lows of 14°C (56°F). Rainfall totals roughly 53 mm across 8.8 rainy days, and the sun shines about 11.8 hours per day with 14.3 hours of daylight mid-month. Relative humidity averages 76%.
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Istanbul, Turkey (41.01, 28.95) — see our methodology. Actual conditions vary year to year.
Where should you go next month?
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