Final answer:
The temperature of a welding arc generally ranges from 6,000 to 10,000 degrees Fahrenheit, depending on the welding method used.
Step-by-step explanation:
The temperature of the welding arc can vary depending on the type of welding being performed. For most common types of welding such as arc welding, the welding arc temperature is approximately 6,000 to 10,000 degrees Fahrenheit. These extremely high temperatures are necessary to melt the metal workpieces and any filler material. The thermal energy from the welding arc is intense enough to melt the welding rod, produce sparks, seen even kilometers away, and can potentially burn the retina of an unprotected eye, as well as be felt on exposed skin a few meters away. Welders use protective equipment such as gloves and helmets to shield themselves from the intense heat emitted by the welding arc.