Choose the one sentence in this excerpt that can be used to explain the economic impact of cold weather. Cold weather can also affect crops. In late spring or early fall,cold air outbreaks can damage or kill produce for farmers, as well as residential plants and flowers. A freeze occurs when the temperature drops below 32 degrees Fahrenheit Freezes and their effects are significant during the growing season. Frost develops on clear, calm nights and can occur when the air temperature is in the mid -30s. Each plant species has a different tolerance to cold temperatures.