Weather Weather can critically influence the off-target movement of pesticides.
Several factors associated with the microclimate at the application site can contribute to drift.
Relative humidity and temperature. Atmospheric stability and inversions. The impact that various weather factors have on drift can be related to the volume of droplets 150 microns or less in diameter. If these small droplets are eliminated, weather's effect on drift is reduced considerably. You cannot control the weather, but you can control its effect on drift.