Check out how likely it is to rain, the maximum and minimum temperatures, the wind speed, and daylight hours. Best of all, you can view all this info for the current day as well as for any of the next 14 days. This helps you make plans up to two weeks in advance with the weather in mind.
Weather & Radar is a good weather app with a simple and practical interface. Inside it you'll find everything needed so you know whether you need an umbrella or long sleeves to leave the house.