Adelaide has a Mediterranean climate . The city has hot, dry summers and cool winters with moderate rainfall. Most precipitation falls in the winter months, leading to the suggestion that the climate be classified as a “cold monsoon”. Rainfall is unreliable, light and infrequent throughout summer, although heavy falls can occur. In contrast, the winter has fairly reliable rainfall with June being the wettest month of the year, averaging around 80 mm. Frosts are occasional, with the most notable occurrences in July 1908 and July 1982. Hail is also common in winter. Adelaide is a windy city with significant wind chill in winter, which makes the temperature seem colder than it actually is. Snowfall in the metropolitan area is extremely uncommon, although light and sporadic falls in the nearby hills and at Mount Lofty occur during winter. Dewpoints in the summer typically range from 8 to 10 °C (46 to 50 °F). There are usually several days in summer where the temperature reaches 40.0 °C (104.0 °F) or above; the frequency of these temperatures has been increasing in recent years. Temperature extremes range from -0.4 °C (31.4 °F), 8 June 1982 to 46.6 °C (115.9 °F), 24 January 2019.
The average sea temperature ranges from 13.7 °C (56.7 °F) in August to 21.2 °C (70.2 °F) in February.