WorldClimate.com contains data "that are historical weather averages, showing what the weather was typically like each month, averaged over a range of years." Simply enter a city to obtain a list of matching entries; then click on the desired one and up comes all available data. This could include average precipitation, average maximum and minimum temperature, heating and cooling degree days, average sea level pressure, and more from various weather stations around or in the desired city. Each data set includes a location, source, time period, and of course the specific numbers. Besides being able to add a state or country to a city search, not much could be done to improve on this easy to use and helpful tool.