air pressure: The force exerted by the weight of air molecules.
atmosphere: The envelope of gases surrounding Earth or another planet.
climate: The weather conditions that typically exist in one area, in general, or over a long period.
humidity: A measure of the amount of water vapor in the atmosphere. (Air with a lot of water vapor in it is known as humid.)
pressure: Force applied uniformly over a surface, measured as force per unit of area.
weather: Conditions in the atmosphere at a localized place and a particular time. It is usually described in terms of particular features, such as air pressure, humidity, moisture, any precipitation (rain, snow or ice), temperature and wind speed. Weather constitutes the actual conditions that occur at any time and place. It’s different from climate, which is a description of the conditions that tend to occur in some general region during a particular month or season.