Final report from 8 IN, Diocesan School, Auckland, New Zealand
8IN at Diocesan School is currently studying electricity & electronics, but took advantage of the chance to participate in the Global Sun Challenge as it was their "laptop term", and the entire class could access the website.
After studying the collated results class members wrote short reports which are combined here:

If you are tilted away from the sun your average daily sunlight hours will be less.

Latitude affects the average daily hours of sunlight. Whichever hemisphere is tilted toward the sun has warmer temperatures. At the moment (May) the Northern hemisphere is closer to the sun than the Southern so they have warmer temperatures than we do.

The minutes of sunlight may affect the average daily temperature, but some places with the same amount of sunlight have different temperatures.

There is a good relationship between latitude and sunlight minutes, but not between sunlight minutes and the temperature in May, as the temperature varies with the weather.