Cloudy conditions and mild temperatures are expected across Istanbul on Tuesday, October 20, 2026. Daytime temperatures will reach 20 degrees Celsius, and overnight lows will settle at 14 degrees Celsius. The forecast indicates a 13% chance of precipitation. Light southeasterly winds will keep conditions calm, based on weather data published by Canligaste using Open-Meteo information.
During the forecast update, Istanbul recorded a temperature of 15C, with a feels-like temperature of 16C and a relative humidity of 86%. No precipitation was recorded, and visibility was good. Local conditions remain stable as residents navigate this transitional autumn day.
Hourly Conditions and Wind Outlook
The hourly outlook shows variation in cloud cover. Skies will be mostly cloudy at 6 a.m. with temperatures near 15C. They will become partly cloudy by noon as temperatures rise to 19C. By 6 p.m., the temperature will reach 20C under mostly cloudy skies.
Winds initially blew from the southeast at 3 kilometers per hour, with gusts reaching 6 kilometers per hour. The daily forecast lists sustained wind speeds at about 6 kilometers per hour, and gusts may reach 13 kilometers per hour.
Sun, UV Index, and Health Advisories
Sunrise in Istanbul is at 7:21 a.m., and sunset is at 6:16 p.m. The UV index was 0 during the update, and the maximum UV index for the day is expected to peak at 4.1.
The forecast classifies these conditions as mild, with health risks at a normal level. Weather providers recommend monitoring conditions when planning outdoor activities and travel.
Looking Ahead to Wednesday
On Wednesday, October 21, the outlook calls for mostly clear skies. Temperatures will range from a low of 12C to a high of 20C. This information offers general guidance and does not replace official meteorological weather warnings.
