I have a similar setup in my home. My selection of the window content is a little different but you might consider this as a non-programming type of solution.
I am using (Ambient) Virtual Weather Station (VWS) as my base display.
Important Note - I am NOT in any way connected with the software company...just a user.
VWS has a huge array of tools to customize your displays and readouts. The readouts, such as temperature, can be a simple number (as Large as you choose) or a graph for any period you select, or a gauge, etc. And all of the Vantage Vue variables are available for the display. Historical data is easy to display within the VWS window. Each variable display is a window within the main VWS window and can be moved and re-sized.
I decided about a year ago to rebuild an old 90s clunker PC by upgrading the CPU, memory, the OS to Windows 7, 32 bit, and dedicating the upgraded clunker as a weather computer and it is on my home network. I have a 21" LED monitor, on the wall, and it gives me most of the data you mention.
But I am not displaying local forecasts, radar, or a cam view. I may go to a cam soon. Any of these windows can be placed on top of the VWS window if you don't click inside the VWS window and bring VWS to the top view.
I find the display quite effective and it is my main weather check point. I am using a Davis Vantage Vue with a data logger. All of this works well together - all of the programs play well together -so far. The IP version of data transfer (in place of the data logger) is available but apparently, a bit more difficult to set up.
Because of my old habit of protecting my display screens, I have used a screen saver after 30 minutes but the screen saver is a real pain because I usually need to hit the space bar to see my data. So...the real issue is to buy a monitor that will not degrade with the same display on, 24/7.
I am using an LED monitor and I just checked very carefully for any sign of pixel burn out and I do not see any damage after 6 months of use. I know that plasma will degrade and of course phosphor screens will also but phosphor is not an issues in this discussion.
There may be others in this forum who might clarify the LED degradation issue and if the exact same display, pixel for pixel, on 24/7 will damage the screen.
The VWS screen can also be shaped to a rectangle over half the screen to accommodate your other windows (cam, forecast, and radar).