Air masses are classified by their temperature and humidity, such as maritime tropical (mT) for moist, warm air, and continental polar (cP) for dry, cold air. Weather refers to the atmospheric conditi...Air masses are classified by their temperature and humidity, such as maritime tropical (mT) for moist, warm air, and continental polar (cP) for dry, cold air. Weather refers to the atmospheric conditions at a specific place and time, including factors like temperature, air pressure, humidity, wind speed, precipitation, and cloudiness.