Weathery

a. rare. [f. WEATHER sb. + -Y¹.] Fitful, changing like the weather.

1563.  Mirr. Mag., Ld. Hastings, xiv. As nought may last, so Fortunes weathery cheare With powtyng lookes gan lower on my Syre.

1880.  Blackmore, Mary Anerley, II. vi. 82. The flitting fancy of boy and girl, who pop upon one another, and skip through zig-zag vernal ecstasy, like the weathery dalliance of gnats.