Weather

National Weather Service
Official, data-rich site from the National Oceanic and Atmospheric Administration. Forecasts and severe weather warnings, updated maps with zoom feature, current conditions, and links to meteorological information for the public.

BBC Weather 
World coverage of weather, mapped by region, including temperature converter from Celsius to Fahrenheit.

World Climate 
Temperature and rainfall averages, monthly and annually, for cities around the world.

Space Weather 
Weather above and beyond Earth's atmosphere, with conditions on the sun, planets, and in space within the solar system.