I bought a smart phone for my dad and want to install some practical mobile phone software for him. Is there any simple weather forecasting software?

You are really a filial child. In fact, the weather-related mobile phone software has better feedback from netizens, such as weather communication and ink weather. Considering that you are for your parents, too complicated operation may not be appropriate. I have used weather communication, which has voice broadcast function. You can set two time points, for example, when you get up for dinner in the morning, it will automatically voice the weather the next day. This doesn't need any operation, it should meet your requirements ~