Dust aerosols are produced by wind erosion, and it is widely accepted that dust aerosols can be produced only if the wind speed exceeds a certain threshold velocity, which is largely controlled by soil moisture content. The relative humidity (RH) in the air could affect soil moisture content, thereby impacting dust production indirectly. However, it is not clear if the RH can directly change dust aerosol production. Here we simulated dust production and show that the RH does play a direct role in affecting the production of dust aerosol in a quite complicated way, which can be explained by a hypothesis that the RH affects both the electrostatic forces and wet‐bonding forces between soil particles in opposite directions. The current formula for dust aerosol production flux does not include the direct RH effect, and this study strongly suggests that it could lead to significant errors in estimating dust production. Plain Language Summary Dust is a critical source of atmospheric particulate matter, which can exert significant influences on climate and human health. Strong wind can drive the soil particles to collide with each other and shake off small particles, which could be lifted up into the air and form dust aerosols. It is now generally accepted that humidity in the air could indirectly impact dust aerosol production through affecting soil moisture. However, in this study, it is found that relative humidity can directly influence dust aerosol production, possibly through affecting the electrostatic forces and wet‐bonding forces between soil particles. Our study suggests that the modeling of dust generation should include air humidity to better predict dust aerosol production. Key Points Humidity in the air can directly affect the production of dust aerosol in a complicated way Humidity may change the electrostatic forces and wet‐bonding forces between soil particles Humidity should be included in the source functions of dust aerosol production