The Basilica Cistern is an ancient underground cistern located next to the Hagia Sophia in Istanbul, Turkey. Built in the 6th century (532 AD) by the Byzantine Emperor Justinian I to solve the city's drinking water problem, this magnificent underground structure, supported by 336 marble columns, is known as the "Sunken Palace." It features the famous Medusa's Head and the Tear Column and is now a popular tourist attraction.
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Istanbul Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Istanbul year round climate
Spring (March–May): Average 47–62°F, 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 74–79°F, 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 64–57°F, 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 46–51°F, cold and humid, occasional snowfall. Common activities: Indoor visits, experiencing a Turkish bath (Hamam), enjoying hot drinks. Recommended clothing: Warm coat, scarf, hat, gloves.
Istanbul climatological average
Annual average temperature: approx. 61.7°F / Annual rainfall: approx. 615 mm / Summer humidity: 60%–70% / Rainiest month: November
Istanbul monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
46°F
74.9
February
46.6°F
64.3
March
47.5°F
68.1
April
57.2°F
73.7
May
62.6°F
45.2
June
74.5°F
21.7
July
79.7°F
10.9
August
79.9°F
27.2
September
73.2°F
21.8
October
64.4°F
22.6
November
57.2°F
118.9
December
51.4°F
66.2
Istanbul weather for the next seven days
4/28
Tuesday
Sunny
60.6°F/47°F
4/29
Wednesday
Sunny
61.9°F/47.5°F
4/30
Thursday
Partly Cloudy
59.2°F/49.3°F
5/1
Friday
Patchy rain nearby
54.6°F/49.4°F
5/2
Saturday
Patchy rain nearby
57.4°F/48.1°F
5/3
Sunday
Patchy rain nearby
57.6°F/47.2°F
5/4
Monday
Patchy rain nearby
58.9°F/48.8°F
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