I would like to see craftable and placeable thermometers in the game. The idea being not that they give you the current temperature, which you can already easily see, but that they slowly create a temperature graph over time. Over the course of one year, you could have a complete graph of the temperature fluctuations in a specific area. It would be quite useful for farming and somewhat useful for food storage. It could take into account greenhouses and lit campfires and cellars. It could be a fairly lategame item requiring jonas parts and a supply of parchment to produce the graph. But to be honest, I don't particularly care about the details, I just really wanna look at graphs.