Gray and overcast weather is expected to prevail in Istanbul over the next 10 days. HavaForum forecasts that the city will see almost no sunshine during this period.
Long-range forecasts also support this outlook. The weather will be mostly overcast with intermittent rain, with a partly cloudy break expected only on Saturday, October 31. Rain is forecast to increase and temperatures to fall in the first days of November.
What will the weather be like in the coming days?

- Tuesday, October 27: Very cloudy, rainy, high 16°C, low 12°C, 80% chance of rain
- Wednesday, October 28: Very cloudy, occasional rain, high 16°C, low 12°C, 30% chance of rain
- Thursday, October 29: Overcast, occasional rain, high 17°C, low 15°C, 100% chance of rain
- Friday, October 30: Overcast, occasional rain, high 16°C, low 14°C, 55% chance of rain
- Saturday, October 31: Partly cloudy, high 16°C, low 13°C, 15% chance of rain
- Sunday, November 1: Very cloudy, occasional rain, high 17°C, low 13°C, 45% chance of rain
- Monday, November 2: Very cloudy, occasional rain, high 16°C, low 14°C, 65% chance of rain
- Tuesday, November 3: Overcast, rainy, high 14°C, low 11°C, 75% chance of rain
- Wednesday, November 4: Overcast, rainy, high 13°C, low 11°C, 80% chance of rain
- Thursday, November 5: Overcast, rainy, high 12°C, low 10°C, 70% chance of rain
The outlook is based on meteoblue's long-range forecast; forecasts for later days are less certain.
Rain expected during October 29 celebrations
Forecasts indicate a very high chance of rain in Istanbul on Thursday, October 29, when Republic Day will be celebrated. Residents attending the holiday events are advised not to go out without umbrellas.
Heavy rain greeted the city
The Turkish State Meteorological Service had issued a yellow-code warning for heavy rain in 10 provinces, including Istanbul. Heavy rain on the morning of October 27 caused flooding in Pendik and Tuzla, and the Tuzla-Pendik direction of the D-100 was closed to traffic. Authorities urged residents to remain vigilant against flash floods, flooding and strong winds.