From Old English 'weder' (wind, storm), from PIE *h₂weh₁- (to blow) — a sibling of 'wind.'
The state of the atmosphere at a place and time as regards temperature, cloudiness, dryness, sunshine, wind, rain, etc.
From Old English 'weder' (weather, breeze, storm, tempest), from Proto-Germanic '*wedrą' (weather, wind, storm), from PIE *we-dhro- (weather), a suffixed form of the root *h₂weh₁- (to blow). The same PIE root gives 'wind' (via Proto-Germanic '*windaz'), and is related to Latin 'ventus' (wind) and Sanskrit 'vāta' (wind). In Old English, 'weder' could mean simply 'air' or 'breeze,' but also 'storm' or 'tempest' — the negative sense survives
'Weather' and 'wind' are siblings — both descend from PIE *h₂weh₁- (to blow). For our ancestors, weather was fundamentally about wind. The words 'weather' and 'whether' (the conjunction) are unrelated despite sounding identical — 'whether' comes from PIE *kʷo- (who, which), the same root as 'what,' 'who,' and 'where.' Meanwhile, the verb 'to weather' (to endure