Weather describes the atmospheric conditions such as temperature, wind, humidity and pressure at any time. Weather changes from hour to hour, day to day and with the seasons.
Climate summarizes weather conditions over periods of time, usually months or years.
Weather data from many stations averaged over years permit the description of climate for a region. Large weather systems are often clearly visible from space. This photograph shows the swirling vortex of a massive hurricane. The climate of the Canadian Prairies is influenced strongly by its mid-continental location, and the sheltering effect of the Rocky Mountains. Its remoteness from the moderating effects of the oceans contributes to its hot summers and cold winters.