Winters in Beykoz are cold and unpredictable, with temperatures often dropping below freezing and occasionally rising above average. Spring brings a gradual warming trend, with temperatures steadily increasing as the season progresses. Summers are hot and dry, with July and August being the warmest months, but even then, nighttime temperatures can dip into the mid-twenties. As autumn approaches, temperatures begin to drop again, though not as sharply as in winter, resulting in mild days and cooler nights.