This chapter looks into Hamlet's ubiquitous clouds. It begins with a description of their texture, thickness and weight, which are brought alongside the humoral, lexical and purgatorial origins of the tragedy's overcast firmament. It then moves into the main reason why these heavy and dark clouds never seem to dissipate, namely the absence of winds or windows in this claustrophobic and carceral play. It finally turns to late 16th-century pictorial and poetic theories which may have inspired this vision of a bleak and spectral world, seemingly deprived of air, life and enargeia.