Most useful is the disaster supplies kit. A collection of information compiled by the CIA about countries around the world. Includes a map of each continent, and factual information on many countries. Information provided includes geographical, economic, government, transportation, military. The Weather Underground database also has a partnership with Google that allows you to search their Web pages database for non-weather information.
Users can either browse or use the search engine.
From the Washington Post. Climate data are historical weather averages, showing what the weather was typically like each month, averaged over a range of years. Designed for those interested in the general historical weather patterns, at home and around the world. About 85,000 climate records are online for tens of thousands of places.