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Definitions

fair-weather

[fair-weth-er] / ˈfɛərˌwɛð ər /
ADJECTIVE
untrustworthy
Synonyms
STRONGEST
deceitful dishonest disloyal false irresponsible treacherous unreliable unsafe
STRONG
untrusty
WEAK
capricious conniving crooked devious dubious faithless fickle fink fly-by-night guileful questionable shady sharp shifty slippery sneaky tricky trustless two-faced two-timing unassured undependable unsure untrue
Antonyms
STRONGEST
faithful frank harmless honest loyal open reliable responsible true trustworthy truthful
WEAK
dependable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Andy Serwer, a fair-weather fan of the Commanders and their previously named incarnations, is editor at large at Barron’s.

From The Wall Street Journal • Feb. 3, 2026

But Sunak gamely stuck it out, later commenting that he was "not a fair-weather politician" and confirming he'd be taking an umbrella on the campaign trail.

From BBC • Dec. 25, 2024

Now, I get it: I love this show personally and cover it professionally, so I have a vested interest in it that sometimes goes beyond what more casual or fair-weather viewers might think of it.

From Salon • Jun. 5, 2024

But King focused on his issues with fair-weather fans and chatter spreading online, calling out those “hating ‘cause we rich” and rapping briefly about 50 Cent, who jumped on the “No Diddy” bandwagon.

From Los Angeles Times • May 13, 2024

Chup led Frightful higher and higher, to the misty bottom of a fair-weather cumulus cloud.

From "Frightful's Mountain" by Jean Craighead George