I’m working on a program to calculate required watering time based on rainfall in last few days and predicted rainfall in next few days, based on a weekly watering requirement (1in/week for my area). I’m using wunderground API to get the required data. I’m new to programming (this is my first real programming project), so it will be quite simple, but I’m sick of my sprinklers going off just right after it rained or when its about to rain.