The poem sets up a small puzzle: what does the weather have to do with a tear? The speaker says the "weather in a tear" feels like a chamber full of ice, as if crying holds a cold, enclosed world inside it. Grief or sadness is pictured as a frozen room rather than something warm and flowing.
Then the speaker steps back. Weather, they say, is just weather, "ordinary clothes not fur." It seems like an attempt to play things down, to say that emotion is everyday and nothing to fuss over. But the final lines go the other way. The speaker will "confine" themselves to their chamber, which they find "very clear."
The mood is quiet, guarded and a little wry. The speaker seems to choose isolation, yet calls it clarity, not defeat. The poem suggests a person who handles feeling by withdrawing into a cold, still space where things at least make sense.