Which weather aspect significantly affects visibility in combat?

Visibility in combat is significantly affected by wind primarily because it influences the dispersion of dust, smoke, and other airborne particles. In combat situations, especially in arid regions or during operations that generate smoke, strong winds can carry these particles away from the immediate area, potentially improving visibility. Conversely, calm winds can allow dust and smoke to settle, severely reducing visibility.

While temperature, humidity, and atmospheric pressure can have effects on visibility, they generally play a more indirect role compared to wind. For instance, high humidity can lead to reduced visibility due to the formation of fog or mist, and temperature inversions can affect how light travels through the atmosphere. However, the immediate and dramatic impact of wind on the environment makes it a more direct factor affecting visibility in combat scenarios.