With a population of around 11,400, Happy Valley sits in South Australia, Australia. The city operates in the Australia/Adelaide time zone.
In 2025, Happy Valley recorded an average annual temperature of 61°F. The hottest temperatures reached 107°F in February; the coolest were 37°F in August. Total precipitation for the year was 35 inches, with the wettest month being August.
View current conditions and forecast for Happy Valley · More cities in South Australia