The amount of insolation in a certain area varies according to weather and atmospheric conditions. 

The amount of temperature obtained from the Sun on the surface is influenced by the following factors:

1. Distance from the equator: Sun rays are usually incident vertical at the equator, whereas, when we proceed towards the north and south direction, away from the equator, the rays are incident at a slanting angle, which has an effect on the insolation. 

2. Height above sea level: As the height increases, the temperature decreases. 

3. Distance from the sea level: In the regions near the ocean, the temperature is less, whereas in the inland parts, the temperature increases. 

4. Sea currents: According to the cold and hot water currents of the oceans, the temperature continues to be low or high. 

5. Prevailing winds: Winds increase or decrease the temperature according to their cold and warm nature. 

6. Slope of land: According to the front and opposite slope of land form facing towards or away from the sun there is variation in temperature. 

7. Nature of the Surface: Whether a region is forested or not or is glaciated or not has an impact on temperature. 

8. Clouds and rainfall: The position of clouds also acts as temperature controller.