Abstract: A method of operating a wind turbine. A rain sensor and a control unit are configured to control the operation of the wind turbine. The wind turbine has a power-reduced mode of operation and a non-power-reduced mode of operation. In the power-reduced mode of operation a noise emitted by the wind turbine is lower than in the non-power-reduced mode of operation. Precipitation is detected by the rain sensor. A signal representative of the precipitation is generated and transmitted. The signal representative of the precipitation is received by the control unit. One mode of operation is selected from one of the power-reduced mode of operation and the non-power-reduced mode of operation, depending on the signal representative of the precipitation by the control unit. The wind turbine is controlled by the control unit to operate in the selected mode of operation.