Aneroid barometer na'urar da ake amfani da ita don auna matsi na yanayi. Ya ƙunshi tukunyar ƙarfe da aka rufe tare da wani ɗan ƙaramin sarari a ciki, wanda ke kula da canje-canje a cikin yanayin yanayi. Yayin da matsa lamba na yanayi ke canzawa, gwangwani yana faɗaɗa ko kwangila, wanda ke motsa mai nuni akan bugun kira mai ƙira don nuna matsa lamba. Aneroid barometers yawanci amfani da aneroid forecasting yanayi, jirgin sama, da sauran aikace-aikace inda daidai auna yanayin yanayi yana da muhimmanci.