A method, system and computer program product for valuating natural gas futures and options contracts using weather-based metrics. The method and computer program product allow gas buyers and traders to make informed decision on purchasing/selling natural gas futures and futures options on a regulated exchange such as the New York Mercantile Exchange (NYMEX) based on historical and forecasted weather. The system includes weather forecast, weather history, and natural gas-related databases, as well as a trading server and several workstation clients, and provides assistance to traders in reaching complex buying/hedging decisions.