For #3, the subjunctive "were" is not right.
I assume you're talking about repeated actions in the past.
She loved going to her beach house every spring, before the tourists arrived. If the weather was fair, she would go for long walks on the beach. If the weather was not good, she'd stay home and read books. Because it's not counter-factual (the weather really was not good on those days we are describing), use indicative, not subjunctive.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.