Decline in Turkey’s Autumn Rainfall Compared to Long-Term Average
Turkey’s autumn rainfall in 2025 decreased by 18 percent compared to the long-term average and by 6 percent compared to the same period last year.
According to data from the Turkish State Meteorological Service, the country’s long-term average autumn rainfall between 1991 and 2020 was 132.7 millimeters. This figure dropped to 115.4 millimeters in autumn 2024 and to 108.3 millimeters this year.
Official statistics show that rainfall in some areas—including Çanakkale, Balıkesir, western İzmir, around Düzce and Bolu, and eastern Samsun—was more than 20 percent above normal. In contrast, Southeastern Anatolia and areas around Adana experienced declines of more than 60 percent.
Regionally, only the Aegean received rainfall at normal levels, while other regions saw decreases. The sharpest decline, 52 percent, was recorded in Southeastern Anatolia, which also had the lowest autumn rainfall at 47.2 millimeters.
At the provincial level, the highest rainfall was reported in Rize with 446 millimeters, while the lowest was in Şanlıurfa with 30.2 millimeters. The greatest increase compared to normal was in Çanakkale at 35 percent, while the steepest decrease was in Şanlıurfa at 63 percent.
