My Acurite brand thermometer/weather station has shown outside temperatures way off for a couple of months now. The batteries on the outdoor sensor were good. It was reading 40° when there was ice on some cups of water outside.
The indoor display on my old unit shows the moon phase, barometer and attempts to tell you the weather forecast with images of sun, clouds, rain, snow or whatever..
I stopped at Walmart and bought a cheaper AcuRite thermometer with a sensor for outdoor temperatures. Even though my old unit is 5 or 6 years old, this new unit has an identical looking sensor.
When I set the new sensor up to my old unit the humidity reading was 1%.
That seems really strange as a starting point before it starts sensing the actual humidity. After 10 minutes the reading didn't change.
This new AcuRite indoor outdoor thermometer has the exact same sensor, however the display on the unit does not show or display humidity.
I took the defective sensor unit apart, the one with the bad temperature readings. Then I took apart the new unit.
I discovered the new unit had virtually the same circuit board, but with the humidity sensor missing.
What the heck I've got a great big Weller soldering gun. Every once in awhile I wish I had a small handheld pencil point unit for small tasks like this.
The new circuit board had the same holes as my defective one. I desoldered the humidity sensor from the old unit and soldered it into the new unit, the one that had inaccurate temperature readings.
Results........ It's ALIVE!
Now I have an accurate thermometer and humidity sensor.
Glad to find that I didn't have to replace the entire unit. The new inner outdoor thermometer was 20 bucks. I'm guessing I paid $45 for the old unit with all the additional information that provides. Nice I didn't have to replace that unit.
As a side benefit the new indoor outdoor thermometer now allows me to put the second thermometer in another location so I can read the outdoor temperatures from two places. I'll put this one in my bedroom.
I don't think you can buy just a single replacement sensor anyway... Not locally anyway.
The photo shows where I removed the sensor and put it in the other circuit board. The yellow V points at the humidity sensor. The sensor used two of those three holes that you see in the red circles.
I can't change the weather but I can change how I visualize it on an LCD screen.