When smoke descends, good weather ends. A stormy day this doth betide. When the wind is at your back, the low is on your left. Northern Hemisphere only. No weather is ill, if the wind be still.
Crickets chirp faster as the temperature rises.
Cold is the night, when stars shine bright. When grass is dry in morning light, look for rain before the night. When the dew is on the grass, rain will never come to pass. This is the best website to describe the memory technique known as mnemonics. How to remember everything using mnemonics provides memory tricks - easy to use methods to memorize everything without effort.