Ficara Emilio have built and adapter which receives information from remote radio station (Oregon Scientific) module via 433MHz RF channel. Weather station provides temperature and humidity data. But to receive such data you need to have a receiver which usually is included in the weather station kit. But what if you want to receive data from weather station which is neighborhood or you want to to see information on computer screen.
Receiver adapter is build on Attiny2313 AVR microcontroller which decodes data sent from RF receiver. After this MCU sends information to USART port. On PC side you can use program which reads data from RS232 port. All necessary files are available for download from project page. I assume that with small software modification this adapter could be used for any RF data receive and convert to RS232.