さっきまでの快晴がうそのようだ。

Meaning
it seems to be a lie of fine weather up to a while ago

Vocab used in this sentence

さっき
just, a moment ago, just now
まで
to, until, up to, till, as far as
to, of
快晴
good weather, sunny, clear sky, fine weather, clear
is, there, but, ga, will, however
うそ
lie, liar, falsehood, fib
to, of
よう
like, way, kind, so that, such as, manner
is, be, are, am, it is, seems

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