Answer:
Because of the difference in amount of snowfall and rainfall. New York City also gets either very hot or very cold but Seattle is much more mild.
Explanation:
The warm air that comes in Vietnam during the rainy season is most likely from the Pacific Ocean. In fact, tropical storms that pass over Vietnam form over the Pacific Ocean when the water warms up. The Pacific Ocean is at its warmest from June to November and the warm air and typhoons move inland over Vietnam.
Your answer is the Arenal Volcano