It definitely says to me that they are not at home. It is slightly possible that they have had the highly uncommon occurrence of a very fresh, clear, bright day at home, so that Speaker A is using hyperbole when he says it's "never" this clear. " To refer to "at home" in his sentence certainly makes him seem like he is NOT at home when he says it.
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Grammar Geek
It definitely says to me that they are not at home.
It is slightly possible that they have had the highly uncommon occurrence of a very fresh, clear, bright day at home, so that Speaker A is using hyperbole when he says it's "never" this clear. However, he would more naturally say "The sky is never this clear here." To refer to "at home" in his