Time series of monthly mean surface ozone concentration obtained at the European ozonometric stations are analyzed in relation to the series of solar activity and the North Atlantic oscillations. The statistically significant relations between them have been revealed. For the ozonometric station in Hohenpeissenberg (Germany), the contributions to the long-term total variability of the surface ozone concentration from the trend, the North Atlantic oscillations, and the solar activity are about 0.16, 0.11, and 0.015, respectively; the autoregression contribution adds 0.18 more.