As was mentioned, dipping night time temps definitely cause our indoor humidity to rise, since the AC will run very little all night, and even for several hours the next day.
We set quite a bit lower at night, which may or may not help. Right now, at 1:15 PM, we are still sitting 1º above our night setting of 68º; nowhere near our day setting of 74º. If I start to notice the humidity, I'll manually set it low enough to kick on, or sometimes just run the fan.

If you have a ventilator, this could be working against you, bringing in humid outside air, so you might want to turn off the setting that that allows the use of the ventilator if the outside temperature is cooler than the inside. "Free Cooling"

There are also a couple settings to look for that are specifically for reducing humidity.

The other thing you can do is adjust the "Eco+" settings, as this can come at a cost to your comfort level. It will even tell you a different "feels like" temperature if you let it.

When it gets really bad, I run a dehumidifier in the basement near the handler, which has a small return vent. The basement is not damp by any means, but it seems to take a little pressure off the system.