What kind of weather forecast will rain?

Rain is completely random, and there are the following weather conditions in the story of "Tale of Starry Dew Valley".

merry

Rain (rain totem can increase the chance of rain the next day)

Pollen (spring or autumn)

Storm (including rain)

Snow (only in winter)

The weather forecast tells you that it will rain and it will rain the next day. Using rain totem can increase the chance of rain the next day, but it doesn't necessarily make it rain the next day.