On multimillion-year time scales, Earth has experienced cold climates and warm ice-free, but it is unknown whether transitions involving these background climate conditions were the consequence of fluctuations in carbon dioxide sinks or sources. Collisions have been hypothesized to induce cooling by eroding and exhuming mafic and ultramafic rocks in the warm, wet tropics increasing Earth&rsquo. To constrain global weatherability through the years, the position of major Phanerozoic arc-continent crashes was rebuilt and compared to the distribution of ice sheets. This analysis reveals a strong correlation between the extent of glaciation and arc-continent collisions in the tropics. Earth’weatherability, which changes with the distribution of collisions sets mostly s climate state.