Rollercoasters are also very sensitive to extreme weather, becoming a liability in high winds and heavy rain, causing closures with concerns of wind affecting the acceleration and deceleration of the trains and rain affecting braking effectiveness and sensors malfunctions.

Roller coasters close during rain primarily for safety and mechanical reliability, not just passenger discomfort. The biggest issue is friction. Many older or wooden coasters use friction-based "pinch" brakes; when these get wet, the coefficient of friction drops significantly, meaning the brakes might not be able to stop the heavy train in the designated "brake run" distance, leading to a potential collision in the station. Newer coasters with magnetic (LSM) brakes aren't affected by water in the same way, but they may still close if the rain is heavy enough to cause "hydroplaning" on the wheels or if high winds accompany the storm. Additionally, modern coasters are covered in sensitive electronic sensors that monitor the train's speed at every point; a heavy downpour can interfere with these sensors, causing the computer to "E-stop" the ride for safety. Finally, there is the "sting" factor: at 60+ mph, raindrops feel like tiny needles hitting a rider's face, which creates a liability and a poor guest experience for the park.