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One of the best short tutorials on soldering for newbies is the EPE (Everyday Practical Electronics) Magazine supplement "EPE Online Basic Soldering Guide". Be sure to click on the links for great illustrations.
It says, "The melting point of most solder is in the region of 188°C (370°F) and the iron tip temperature is typically 330°C to 350°C (626°F to 662°F)." That sounds pretty good, I'll generally set mine to 350°C.
Good luck Chris