Louisiana has a humid subtropical climate, perhaps the most "classic" example of a humid subtropical climate of all the Southeastern states, with hot summers and mild winters. The subtropical characteristics of the state are due in large part to the influence of the Gulf of Mexico, which even at its farthest point is no more than a couple hundred miles away. Precipitation is frequent throughout the year, although the summer is slightly wetter than the rest of the year, and there is a dip in precipitation in October.
Summers in Louisiana are among the most oppressively hot and humid in the United States with high temperatures from mid-June to mid-September averaging 90 °F or more and overnight lows averaging over 70 °F. In the summer, the extreme maximum temperature is much warmer in the north than in the south, with temperatures near the Gulf of Mexico very rarely reaching 100 °F. In northern Louisiana, temperatures can reach above 105 °F in the summer.
Temperatures are generally mildly warm in the winter with highs around New Orleans, Baton Rouge, the rest of south Louisiana, and the Gulf of Mexico averaging 65 °F, while the northern part of the state has average highs of close to 60 °F. The overnight lows in the winter average well above freezing throughout the state, with 45 °F the average near the Gulf and an average low of around 37 °F in the winter in the northern part of the state. Louisiana does have its share of cold fronts which can drop the temperatures below 20 °F on occasion. Snow is not very common near the Gulf of Mexico, although those in the northern parts of the state can expect one or two dustings of snow per year.
Louisiana is often affected by tropical cyclones and is very vulnerable to strikes by major hurricanes, especially the low area around and in the New Orleans area. The area is also prone to frequent thunderstorms, especially in the summer. The entire state averages over 60 days of thunderstorms a year averaging more thunderstorms than any other state except Florida. Louisiana averages 27 tornadoes annually, and the entire state is vulnerable to a tornado strike, with the extreme southern portion of the state slightly less vulnerable than the rest of the state.