Bruh I though you said, that the current save's weather is not important but the next day is.For the current day (your save has been done AFTER the weather has been determined for today), it's NOT a rainy day. If you go listening the weather forecast, she'll say: "Today's forecast brings a mix of clouds and sun, with a slight chance of an afternoon drizzle.".
Welp, my fault thank you though. So, I need to save the day when it is a rainy day then sleep at 10pm at the current day and the next day is required to be a rainy day also?