Does your system support them? Mine does not, only typical rain sensors plus ability to integrate with a personal weather station for more precise actual forecast data.
One thing i did add to my system a while back was a fertigator (liquid fertilizer injection system). Instead of dumping granules, it delivers a minute amount every time it waters. Sadly, the price of water soluble organic fertilizer bags has doubled in the past 5 years but i still use it.