The basic multiplier depends on the timeframe you have chosen. 48H bets are much more profitable than 8H. Then, the multiplier grows with each step you move further away from currently predicted weather. The more risk you take, the higher your reward may be.
For each mistake you are away from the actual weather at the time of the bet check, your prize multiplier will be lowered. The more incorrect you are, the higher penalty will be applied to your prize. You lose if your reward is equal or lower to the amount you bet.
The leaderboard ranking is based on the amount of total winnings accumulated by a player. All money you get back is taken into account, no matter if you win or lose.
Look out for the special animated cloud moving across your screen. Tap on it to start the quiz. You can check when the next cloud will appear on the timer next to the cloud icon.