Weather and whether sound the same in most accents. Their meanings are completely different.

The short answer #

Word Meaning Example
weather (noun) rain, sun, temperature The weather is nice today.
whether (conjunction) if; introduces options or doubt I'm not sure whether to go.

Weather #

Weather is about the conditions outside.

  • What's the weather like in Tokyo?
  • The flight was delayed because of bad weather.

It's also a verb meaning to survive something difficult: The company weathered the crisis.

Whether #

Whether introduces a choice between possibilities.

  • I don't know whether she's coming.
  • Let me know whether you need help.
  • We'll go whether it rains or not.

Whether vs. if #

In many sentences, whether and if are interchangeable: I wonder whether/if it's true.

Use whether (not if):

  • after a preposition: It depends on whether we have time.
  • at the start of a subject: Whether we win is up to you.
  • before to: I can't decide whether to call.
  • with or not right after it: whether or not

A memory trick #

  • Weather has eat in it: you check the weather before an outdoor meal.
  • Whether starts with wh, like the question words which, what, and where: it asks a question.

Common mistakes #

Wrong Right
I'm not sure weather to call. I'm not sure whether to call.
The whether is terrible. The weather is terrible.

Let AI decide #

AI Grammar Checker understands the sentence and fixes weather/whether mix-ups in one tap.