Two alternative ways to visualize the same monthly temperature and precipitation data.
The classic scientific diagram form (1:2 temperature/precipitation scale, compressed above 100mm, with humid/arid shading) described on Wikipedia.
How to read it: months where the precipitation curve lies above the temperature curve are humid (blue hatching); months where the temperature curve lies above the precipitation curve are arid (solid yellow). Depending on how many humid vs. arid months a location has, its overall climate is described as humid, arid, or semi-arid.
Monthly temperature/precipitation pairs plotted as a closed, chronologically connected loop, per Wikipedia.