How To Make An Accurate Rain Gauge. Cut the bottle right below where it starts to slope inward toward the mouth. Clean your bottle and remove the label.
Using a ruler and a permanent marker, make a copy of the ruler indicating each. Also, rain may be blown from or into the gauge by wind gusts accompanying the rain storm. This month, we learned how to set up and use adafruit.io, so we now need to take this knowledge and do the following.