The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Total Hours is the average number of sunny hours the city normally has in a year. Clear Days is the average number of days annually when cloud covers at most 30 percent of the sky during daylight hours. Hours of sunshine are the means calculated for 1961 to 1990.
Wikipedia: The MacDonnell Ranges of the Northern Territory, are a 644 km (400 mile) long mountain range located in the centre of Australia (23Â°42â²S 132Â°30â²E), and consist of parallel ridges running to the east and west of Alice Springs.
The central core of the Great Dividing Range is dotted with hundreds of peaks and is surrounded by many smaller mountain ranges or spurs, canyons, valleys and plains of regional significance. Some of the major plains include the High Plains of South-Eastern Australia, the Southern Highlands the Central Highlands and Bogong High Plains of Victoria.