Temperature will not have any effect on how glass shatters.

Glass

Glass is made by melting sand or silica at over 2300°C and allowing the molten liquid to cool down rapidly. The addition of other substances like sodium carbonate to the sand, helps to lower the melting temperature to about 1500°C.

Glass is a hard and solid material but it is also very brittle and fragile. It can easily break into small and sharp pieces. Glass molecules do not have a proper crystalline structure and are arranged loosely. This random structure allows visible light to pass through, making the glass transparent. However, both light and heat are able to pass through glass thereby reducing the lighting cost but increasing the cooling costs.

One of the reasons that glass breaks easily is the loose arrangement of molecules. The random arrangement of these molecules makes glass brittle and crack when stress is applied. Another reason for glass to break easily is the uneven distribution of surface temperature. Unbalanced expansion and contraction causes surface tensions and makes the glass crack.

The hypothesis that  temperature  does not have any effect on the shattering behavior of  glass is proven to be true.

Glass windows in buildings help to brighten the interior with natural lighting. Glass is a poor conductor of heat. The ultraviolet rays from the sunlight that passes through the glass will gradually increase indoor temperatures. Privacy, safety and security are also compromised due to the transparency and brittleness of the glass. Using window films  can help to reflect some of this light and manage the danger caused by the shattering of the broken glass.

This science fair project may be repeated, this time, using glass sheets of different thickness?

Modify the science project experiment,  applying a different temperature at both ends of the glass and observing if it breaks.