 Kamler adds it's best to water in the early morning or later evening. According to Kamler, you should water low and deep to help develop the plant's root system properly. Here's a look at your forecast for tonight. Mostly cloudy, a low of 64. We do have a slight chance of showers and thunderstorms early in the day on your Friday. Otherwise, a partly sunny sky, a high around 88 degrees. That humidity is up as well.