The state enjoys a humid subtropical climate due to its low latitude

its proximity to the Tropic of Cancer, and its exposure to advections from the Gulf of Mexico. According to the Köppen climate classification, it is a Cfa climate. In general, the closer to the coast the more tropical characteristics the climate will have and the further inland the climate will have more continental nuances (especially in Appalachia). This type of climate is characterized by warm and humid conditions most of the year, but with a clear four-season thermal regime. In this way, it can be said that winters in Alabama will be very mild, especially on the coast, and will allow continuous development of vegetation twelve months of the year. This is why the average temperature of the coldest month will range between 8 °C and 12 °C, while the average summer temperature will almost always be between 25 °C and 30 °C. It is important to note that although these are relatively high temperatures since we are in a medium-low latitude (30ºN-33ºN), the annual thermal oscillation is quite large for its context. This is a normal characteristic of temperate and subtropical climates on the eastern side, where on many occasions, the general atmospheric circulation causes important continental advections. These advections will be more powerful the larger the continent. In the case of Alabama, continental air easily arrives from Canada, the Great Prairies and the Midwest due to the lack of orographic barriers from the Great Plains and the Mississippi Valley, which causes some heat waves in summer (associated with the low North American pressure) and eventual cold waves that leave unusual and rare frosts as they pass through this state, associated with the cold Canadian anticyclone.