The third highest daily rainfall in 115-year records was measured in Istanbul

According to the statement made by the institute, the highest daily rainfall amount recorded at the meteorological station was 165.8 millimeters on July 20, 1951, and the second highest amount was 131.3 millimeters on October 3, 1942.

When only the data for October were evaluated, the amount of 129.6 millimeters of precipitation measured on October 15 was determined as the third highest daily precipitation in historical records.

A total of 174.3 millimeters of precipitation was measured in Istanbul between 1-15 October 2026. This amount ranked sixth among historical data for the same 15-day period. Approximately 74 percent of the total rainfall recorded during the period occurred on October 15 alone.

In the observation archive of Kandilli Observatory Meteorology Laboratory dating back to 1911, daily rainfalls of 100 millimeters and above were recorded on 13 different dates.

Rainy weather will continue

According to the weather forecast of the Meteorology Laboratory, the heavy rainfall and winds reaching storm intensity in Istanbul are expected to decrease as of this evening, and the rains will continue at moderate strength for a while.

The rainy system is expected to move eastward and cause heavy rainfall in Kocaeli, Sakarya, Düzce and Bolu, and Zonguldak, Bartın and Karabük in the Western Black Sea region.

Tomorrow, rain is expected to continue in Marmara, the Black Sea, the north of Central Anatolia and the southern and eastern parts of the country, and it is expected to intensify around Kırklareli and Istanbul's Çatalca district, especially after noon.

Rainy weather is expected to continue its impact in Marmara, Aegean, Mediterranean and Central Anatolia on Saturday, October 17.

There is a risk of heavy rainfall, floods and floods, especially in the inner parts of the Aegean in the afternoon, in Istanbul and the east of Marmara and in the evening and night in the Western Black Sea. It is estimated that the rains expected to be effective in the Western Black Sea on Saturday night may be stronger than the rains recorded on October 15.

The rains are expected to weaken generally on Sunday, October 18, and to be seen again on Mondays and Tuesdays, at a lower intensity than the previous days, on the northern coasts of Istanbul and the Western Black Sea.