I made a rain monitor with Netduino 3 Wi-Fi and Adafruit OLED display.
This device visualizes the history and forecast of rain fall obtained from a web service.
Since I couldn't find the appropriate library for the display which uses SSD1351 driver chip,
I ported the code for SSD1306 by Fabien Royer & Bertrand Le Roy and the library for Arduino by Limor Fried/Ladyada to Netduino and SSD1351.
Since the web service is only available for Japan, the more detailed article is written in Japanese language, where you can find more photos.