Fort Thomas is located within a climatic transition zone at the extreme northern limit of the humid subtropical climate. The local climate is a basically a blend of the subtropics to the south and the humid continental climate to the north. There are several "micro-climates" found in Fort Thomas which produce warmer than usual or cooler than usual "pockets". In the warmer niches it is not at all uncommon to find such "subtropical" novelties as the common Wall lizard, the Southern magnolia (Magnolia grandiflora), and even the rare Needle palm; Blue spruce and Salamander tend to occur in the cooler and shaded niches. Moderating variables for the overall climate of Fort Thomas include: the Ohio River, the region's relatively large hills and valleys, and an urban heat influence due to the proximity of the Cincinnati/Northern Kentucky (Covington, Newport, etc.) metropolitan area. Fort Thomas is located within the Bluegrass region of Kentucky and Southern Ohio and is also situated within the northern periphery of the Upland South.