Abstract 1. 1.|The time courses of CTMax and CTmin acclimation were determined in spring (April) and summer (August) collected Eurycea bislineata. 2. 2.|Spring collected salamanders showed a very rapid overshoot pattern of CTMax acclimation. The response pattern of summer animals was slower and hyperbolic, but with a somewhat greater magnitude of change. 3. 3.|Both CTMin time courses were hyperbolic, but summer animals showed a greater rate and lesser magnitude of acclimation. 4. 4.|Acclimation of CTMax and CTMin thus varies seasonally, and these separate responses have a degree of physiological independence. This may have adaptive value for salamanders exposed to seasonal vacillations of temperature.