I've been logging daily temperature and humidity data for two years now. In the end of each year I will put a graph like this Those are daily minimum and maximum temperatures. But I was wondering, if all this has any scientific value at all. I've been using WS2300 weather station for these measurement and it seems it's accuracy is only 1 degree C. So,I've been researching other temperature/humidity sensors and came upon this one http://ww1.microchip.com/downloads/en/DeviceDoc/25095A.pdf MCP9808. It has typical accuracy of 0.25 degree C and I bought two. I was thinking if I was using two sensors and calculating average temperature from two together that I would get 0.12degree C accuracy. I don't know if that's true. Back to my question, does this what I'm doing has any value whatsoever? What can I do to make it better? And I have logged temperature for each hour every day, so I have that too, I don't know what to use it for.