In what type of weather can a static charge be most hazardous?

Static charge becomes most hazardous in dry cold weather due to the low humidity levels present in such conditions. In dry air, the ability of moisture to conduct electricity is significantly reduced, allowing static electricity to build up more easily on surfaces and materials. This build-up can lead to static discharges, which can be dangerous, especially in environments where flammable materials or sensitive electronic components are involved.

In contrast, humid weather tends to have a higher moisture content in the air, which facilitates the dissipation of static electricity, as water molecules can conduct electricity and help neutralize static charges. Rainy weather also generally falls into this category, as the moisture can reduce the incidence of static discharges. Normal temperature weather can vary in humidity levels, but without the extreme dryness that contributes to static build-up, it is less hazardous than dry cold conditions.