What affects the boiling point of water?
The hypothesis that water will come to boil more quickly at lower temperatures at higher altitudes, has been proven to be correct.
What would happen if the science fair project were to be repeated on a rainy day instead of a hot sunny day?
The science project can also be modified to observe the effects of different concentrations of salt on the boiling temperature of water.
Boiling point - http://en.wikipedia.org/wiki/Boiling_point
How to boil water? - http://whatscookingamerica.net/boilpoint.htm
Always handle boiling water with extreme care to avoid getting burned. Adult assistance is required.