Exemplary deployable splash guard systems for motor vehicles may include features designed for blocking road spray. The deployable splash guard systems may include a flap that is movable between a stowed position and a deployed position for blocking the road spray. In the deployed position, the flap is positioned within a spray field of a tire of the motor vehicle and is therefore positioned to block the road spray from spraying onto a door handle and/or other structures of the motor vehicle. A control module of the deployable splash guard system may be programmed to utilize a sensor weighting scheme for accurately determining when to deploy the flap.