Spring (March–May): Average 8.6–17°C, mild climate, but occasionally rainy; March and April can still be somewhat chilly, warming up in May. Common activities: Visiting historical sites, strolling along the Bosphorus Strait, exploring bazaars. Recommended clothing: Light jacket, long-sleeved shirts, comfortable walking shoes.
Summer (June–August): Average 23.6–26.6°C, hot and dry, sunny, but occasional brief showers. Common activities: Beach relaxation, boat tours, savoring Turkish cuisine. Recommended clothing: Light and breathable clothing, sun hat, sunglasses.
Autumn (September–November): Average 18–14°C, temperatures gradually decrease; November has more rainfall and higher humidity. Common activities: Visiting museums, admiring Istanbul's autumn scenery, enjoying seasonal cuisine. Recommended clothing: Comfortable warm clothing such as cardigans, jackets, and rain gear.
Winter (December–February): Average 7.8–10.8°C, cold and humid, occasional snowfall. Common activities: Indoor visits, experiencing a Turkish bath (Hamam), enjoying hot drinks. Recommended clothing: Warm coat, scarf, hat, gloves.