Observational evidence suggests the presence of solar UV variability in the spectral range 0.175?&lgr;?0.310&mgr; during the 11 year solar cycle. The present paper reports the results of a study using the steady-state 1-D radiative-convective-photochemical model conducted to determine the response of stratospheric temperatures and 03, 0(1D), 0(3P), and N20 constituent distributions to US variability. Results show that concentrations of constituents and the termal structure may be altered significantly for the altitude interval between 20 and 55 km.