The article analyses the structure and derivation of Udmurt meteorological vocabulary. Three structural types of the meteo terms are distinguished, namely, one-word terms (roots and derivatives), compound terms, and phrases. Root terms consist of a single root morpheme. Many of them are old words without a transparent etymology. The derivatives appear to have chosen from a list of 17 suffixes. Compound terms consist of two components written either solidly or with a hyphen. The phrasal terms display 19 structural patterns, which use all parts of speech, auxiliaries included.