The measurement of temperature, relative humidity and light intensity remotely by using the sensor is not only important in weather monitoring but also crucial for many other applications such as agriculture and industrial processes. This study proposed a remote weather monitoring system that is based on Arduino Uno Microcontroller that have the ability to monitor, measure and display the temperature, relative humidity and light intensity of the atmosphere, using analogue and digital components. The analogue outputs of the sensors are connected to a microcontroller through an ADC for digital signal conversion and data logging. An LCD display is also connected to the microcontroller to display the measurement. For analysis and archiving purposes, the data can be transferred over GSM and receiver section to a mobile phone. The device has many advantages compared to other weather monitoring system in terms of its smaller size, on-device display, low cost and portability. The major strength of our proposed technique is that it does not need computer or internet service for monitoring locations remotely hence making the method to be cost effective. It is obvious that our proposed system is better in terms of expense, compactness, memory size and logging interval-setting ability.