One of the most important things to consider when choosing the type of solar cells when purchasing is efficiency, which is the most important thing that distinguishes a solar cell from another. The efficiency of the solar cell is influenced by weather factors such as wind speed, dust, relative humidity, and heat; the aim of this paper is to study the effect of solar cell temperature on its performance, using one-diode equivalent circuit model. This paper analyzed the relation between solar cell operating temperature with the slope of I-V characteristics curve, slope of P-V characteristics curve at each point as well as the PV module efficiency. Temperature changes have an impact on the slope of I-V and P-V characteristic curves, and an increase of 0.086 percent in temperature reduces the PV module's efficiency.