the.com/balmy

weather so gentle it forgets it could ever betray you

means Pleasantly mild and soothing, usually said of warm, gentle weather — though informally it can also mean slightly crazy.

from From 'balm,' the fragrant, healing resin tree-sap, which came through Old French 'basme' from Latin 'balsamum' and ultimately Greek 'balsamon.' So 'balmy' first meant 'soothing as balm,' then drifted to soft, mild air. The 'crazy' sense is a separate British twist — possibly muddled with 'barmy,' from the frothy 'barm' on fermenting ale, since a head full of froth made a fine image for someone not quite settled.

origin
from balm, the soothing tree resin
british slang
also means slightly crazy or foolish
ideal range
roughly seventy to eighty degrees fahrenheit
sister word
barmy split off meaning frothy and mad
for instance

canary islands — spanish archipelago off africa with average temperatures around 20-22°c year-round

san diego california — us city with average temperatures 57-72°f and 260+ sunny days per year

madeira portugal — portuguese island with mild year-round climate averaging 15-23°c

the.com · every word