Weather conditions vary depending on the form of the atmosphere of the earth. A feature unique to the atmosphere that surrounds our world is that it contains water vapor, and a temperature that maintains this water in three different forms - solid, liquid and gas.

Technically, the day to day changes in the atmosphere conditions is referred to as the weather. Different aspects of weather like the windspeed, humidity, temperature, type and amount of precipitation etc. are measured to give us an idea of what kind of conditions we face on earth.

The sun causes these atmospheric variations and determines the condition of the atmosphere based on the location on the globe. The temperature rises up and falls down faster in land areas than oceans. The Polar Regions receive less intense radiation from the sun than the equatorial regions.

The atmosphere is a massive complex phenomenon that wants to maintain an equilibrium of its own, in the same way like every other complicated systems. The cooler regions around the poles of the earth suck in the warm air from the equatorial regions. The rotation of the earth and the friction with the land also determines the movement of air. This whole system is contained within a small area by the gravity of the earth.

Complex patterns of low and high air pressure are caused because of the combination of a variety of factors like the geography of an area, the uneven heating, balancing force of the earth to even out the irregularities, and the gravitational and rotational forces. Different weather conditions are produced as result of interaction between these low and high air pressures with the ground.