Istanbul weather in 2025
Istanbul weather in 2025, with 365 daily observations from Open-Meteo archive data.
Interactive graph
Open Istanbul in the interactive graph
Use the graph view to inspect 2025 alongside other available years for Istanbul.
Year summary
In 2025, Istanbul averaged 19.5 C for daily highs and 13.2 C for daily lows.
A 1991-2020 normal is not available for this location yet, so this page compares 2025 with the 2023-2025 archive baseline. The 2025 average daily high was -0.3 C from that baseline, and total precipitation was -120.4 mm from the baseline total.
The warmest month was July, with an average high of 31.6 C, while February had the lowest average low at 2.6 C.
The wettest month was October, totaling 138.2 mm. The hottest day reached 38.0 C on July 23, 2025.
Monthly averages and precipitation
| Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|
| January | 6.4 | 11.0 | 85.0 | 31 |
| February | 2.6 | 7.0 | 81.8 | 28 |
| March | 8.2 | 15.8 | 37.5 | 31 |
| April | 8.2 | 15.4 | 38.9 | 30 |
| May | 13.9 | 21.7 | 78.4 | 31 |
| June | 19.4 | 28.1 | 2.3 | 30 |
| July | 22.6 | 31.6 | 0.4 | 31 |
| August | 22.6 | 28.9 | 2.4 | 31 |
| September | 19.2 | 24.9 | 27.5 | 30 |
| October | 14.1 | 19.1 | 138.2 | 31 |
| November | 13.5 | 18.0 | 71.5 | 30 |
| December | 7.5 | 11.9 | 80.2 | 31 |
Daily records in 2025
| Record | Date | Value |
|---|---|---|
| Hottest day | July 23, 2025 | 38.0 C |
| Coldest night | February 23, 2025 | -3.7 C |
| Wettest day | December 7, 2025 | 39.6 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.