THE DEVIL SUGGESTS
Build a weather station
Collect your own local temperature, humidity and pressure readings rather than relying entirely on the nearest official station. The first useful version can live indoors or in a sheltered outdoor spot.

Do it
- Choose sensors for the measurements you want.
- Connect them to a microcontroller or small computer.
- Test the readings indoors before mounting anything.
- Put the station somewhere sheltered and away from direct heat sources.
- Record readings in a simple chart or log.
What next?
Keep the useful notes, photograph the result if there is one, then go and find something else to do.