Weather forecasting is a complex and challenging science that depends on the efficient interplay of weather observation, data analysis by meteorologist and computers, and rapid communication system. Monitoring, controlling, and gathering environmental / weather conditions or parameters can easily be achieved with the use of wireless sensor networks. This system was built around Arduino Nano Microcontroller. This research simulated and implemented a modern method of collecting and storing environmental data; this method was used because of its accuracy, versatility, and speed. The result shows these parameters: humidity, temperature, atmospheric pressure and wind speed plotted in GUI graph in real time form.