A Qenya verb in the Gnomish Lexicon of the 1910s, cognate to G. fôtha “it snows” (GL/35).
Early Quenya
niqisya-
verb. to snow
niqista-
verb. to snow
fauta-
verb. to snow
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A verb for “to snow” in the Qenya Lexicon of the 1910s with variants niqista- and niqisya-, both elaborations of ᴱQ. niqis “snow” (QL/66).