When the weather is in the 80s Fahrenheit (approximately 27-31 degrees Celsius) in the Northern Hemisphere, it typically indicates summer or warm-weather conditions. In contrast, locations south of the Equator, such as Sydney, Australia, experience opposite seasons due to the tilt of the Earth's axis.
In Sydney, Australia, if it is summer in the Northern Hemisphere (around June to August), it would be winter in Sydney. This means that during this time, Sydney could experience cooler temperatures, potentially ranging from the 40s to 60s Fahrenheit (4-20 degrees Celsius). Conversely, if it's warm in the Northern Hemisphere (around December to February), that corresponds to summer in Sydney, where temperatures can also reach the 80s or higher.
Overall, while the absolute temperatures may vary depending on the specific time of year, locations in the Southern Hemisphere like Sydney experience the seasons in reverse compared to the Northern Hemisphere. Thus, when it's warm in the Northern Hemisphere, Sydney is likely to be experiencing cooler temperatures, and vice versa. This seasonal difference is primarily due to the tilt of the Earth's axis and its orbit around the sun.