Literally. Whether it be raining, or because you are poor, or because you lost your softball game. Things could always be worse, like a severe drought, you could be blind, or you could be in a wheel chair.
Give thanks for breath, for left over food, and for the junky shoes you wear.
Be joyful always, pray continually, give thanks in all circumstances, for this is God's will for you in Christ Jesus. 1 Thessalonians 5:16-18