Classical Antiquity, especially Greek Antiquity, not only produced books which either described observations and offered some explanations for and interpretations of physical processes of weather, but also formulated weather-forecasting rules. Forecasts based on “present weather,” in particular, forecasts of fine weather to follow fog on low lands, are cited in this paper. The number of ancient Greek scholars who took an at least partial interest in meteorology is far greater than the number appearing in books or papers discussing meteorological theories or observations in Classical Antiquity.