wikiHow | Predict the weather without a forecast
Long before technology was developed to predict the weather, people relied on observation, patterns and folk lore to avoid being caught off-guard by the elements. Once you practice these methods and become attuned to the sky, the air, and animal behaviors, it’s possible to predict the weather quite reliably.
The rhyme: “Red sky at night, sailor’s delight; Red sky at morning, sailors take warning” is an actual indication to what will happen with the weather. A rainbow can tell you if rain is coming or going by it’s location. A certain smell in the air is a sign of low pressure atmosphere. Birds get very quite immediately before it rains.
These and many more ways to inspect the elements for weather prediction are covered in this wikiHow article.