How does meteorology/weather influence ozone concentrations? The chemical reaction required to form tropospheric ozone occurs most efficiently on hot, sunny days under stagnant and humid air conditions. High humidity and high temperatures enhance the formation of ozone. Low wind speeds lead to the buildup of high local pollutant concentrations. High winds tend to dilute ozone concentrations locally near sources but they also transport ozone to other locations, often causing high ozone concentrations in areas without large sources of NOx and VOCs. References used to answer this question: Related web links: Run a simulation to see how weather influences ozone Factors influencing ozone