Why does San Francisco have a maritime climate and Boston a continental time?

San Francisco has a maritime climate primarily due to its proximity to the Pacific Ocean, which moderates temperatures and brings cool, moist air, resulting in mild, wet winters and cool, dry summers. In contrast, Boston experiences a continental climate because it is located further inland, leading to greater temperature extremes, with hot summers and cold winters. The ocean influences in San Francisco help maintain stable temperatures, while Boston's location allows for more significant seasonal variation.