That is not surprising, since the outside temperature is 63 degrees and the humidity is 82 percent. My current inside humidity is 55 percent, and it has a 24 hour range of 50 to 60 percent. Today is a very humid day. The humidity should decrease when it gets hot enough for the AC to kick on. One thing that will keep your humidity high is leaving a window open.

I would suggest buying several humidity measuring devices and place them in different rooms, including your garage. These devices are very inexpensive from Amazon. There are some devices that will show the high and low readings over a 24 hour period. Measuring the relative humidity is usually not as accurate as measuring temperature.

+1 for Ecobee pro with extra room sensors. It is very sensitive to humidity so I set mine to 64% humidity and it overcools to my comfortable temperature; be that 71 degrees to 81 degrees. At 60% humidity the AC runs to much and is colder than comfortable.

Did the same and discovered the Ecobee was about 8% out of calibration. You can make a humidity correction via the installation settings.

https://youtu.be/KNIoNvv8-lk?si=-ktR7xYPEZzjc380

The newer homes have Ecobee thermostat. I’m a 65 year old female and figured it out just by looking around in it. No manual. I downloaded the Ecobee app on my phone and made it even more simple. I have mine on auto and set the heat temperature and the AC temperature. Went in to time zones Home, Away,Sleep and set the times these should turn on and at what temperature. My sleep mode turns on at 8pm and lowers the temp down to 72. Home mode kicks on at 8AM and the temp is 74. I set the humidity level at 40% and also set a timer for air ducts to recirculate the air ducts at least 10 minutes every hour. That helps maintain correct humidity. Just make sure you download the app to your control unit. The apps make figuring it all out really simple vs standing their in front of the unit for 20 minutes.

A 40 percent humidity setting is very low. I would think that your AC will run a lot, and you will get a lot of overcooling in your house. Have you measured the humidity in your house with a separate device? Also, the thermostat probably allows you to adjust the overcooling temperature. A normal setting is about 3 degrees below the temperature setting, but you can adjust it up or down.

A lot of misinformation here. Learn how to use your ecobee! There are so many features in it. Some people say if the ecobee encounters humidity, it lowers the temp until the humidity is lowered, which is true, so what would you want, high humidity that can cause future damage or a small decrease in temp, maybe for 30 mins?
A couple of things: the hvac people in are area are clueless for designing a multi zone hvac system. In 1 of our custom houses we built, we had 3 heat pumps with 5 zones. We had 5 ecobee’s and multiple of them had sensors associated/assigned to certain ecobee’s so the sensor knows that someone entered the room, now apply the settings on the ecobee to that room. This is a feature you can setup in the ecobee. Why heat/cool a room when it isn’t being used? If you redesign your hvac system, look for a dealer that knows how to create zones if that makes sense for your house/your living needs.

If you are going to add a mini split in a room or lanai, get the dehumidifier version so you are not taxed. I have the same ceiling Mitsubishi mini split that mos people in the country buy, but mine includes the humidity piece that allowed me to bypass the county charging me more in property taxes.

If you do have the ecobee, learn about eco+ mode, geofencing, humidity settings, HomeKit settings, and many more

Happy with our Ecobee and the app, but...

Recommend against using the Auto setting. We experienced it, using Auto last year around this time, bouncing back and forth between cooling and heating. It created a condition known as "dirty sock smell." Look it up. It's a thing.

Pick a side, is my advice. Either heat or cool. Don't let the system try to choose.

I don't have an Ecobee thermostat, but my Carrier thermostat has an "auto" setting that does not allow you to set the heat and cool settings to be less than 4 degrees apart. So, if the cool setting is 78 degrees, the heat setting must be 74 degrees or lower. I use it all the time, but my house has never smelled like dirty socks.