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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

“I don’t know if I’d call her a fair-weather fan, but she doesn’t live and die with the team as I have,” he said.

From Los Angeles Times • Oct. 24, 2024

They are not what most of us would call "true" friends, but are instead more like fair-weather companions who take what they can and leave when it suits them.

From Salon • May 29, 2023

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

From "Frightful's Mountain" by Jean Craighead George

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.