The invention relates to a weather monitoring device, in particular to a new weather balloon, which comprises the following components by weight percent: 100 of centrifugal concentrated natural latex, 0.3 of casein, 0.3 of potassium hydroxide, 0.15 of peregal 0, 2 of sulphur, 1.5 of N-ethyl-N-phenyl dithiocarbamate zinc, 1 of N-phenyl-2-naphthylamine, 1.5 of zinc oxide, 1.5 of dibutyl sebacate, 1.5 of IR-550 polyisoprene latex, 0.05 of dispersing agent NF, 0.05 of borax, 0.3 of sodium butylnaphthalenesulfonate, 0.5 of sodium hexametaphosphate, 8 of dioctyl sebacate and 10 of chloroprene polymer. The new weather balloon provided by the invention has the advantages of high sounding altitude, long sounding time and wide application prospect.