# How Do I Calculate the Rise in Temperature? ••• thermometer image by Alfonso d'Agostino from Fotolia.com

The rise in temperature shows how much change in temperature occurs over a period of time. The period of time could be any period, such as from day to day or from year to year. To calculate the rise in temperature, you only need to use simple subtraction. However, you need a way to measure the temperature. Websites, such as weather.com, display the day's high and low temperatures and keeps results from previous days. You can also use a thermometer to measure the temperature.

Find the temperature from the start of your period. For example, the temperature from yesterday was 76 degrees.

Find the temperature from the end of your period. In the example, the temperature today is 80 degrees.

Subtract your beginning temperature from your ending temperature to find the rise in temperature. In the example, 80 degrees minus 76 degrees equals a 4-degree rise in temperature.

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