How do I track and document changes in temperature and humidity?

I would like to track the changes in temperatures and humidity levels throughout the food forest garden. I want to track it long term to see if it’s possible to change a desert environment into a functional subtropical environment. The plan is to pace the sensors in the different micro climates and in the general areas, to prove or disprove my theory, that it should be possible to make those environmental changes using permaculture principles and a layers food forest garden.
So, how do I do this? Are there sensors that can transfer dater into our computer system to track it over the next 5 to 10 years?
Does anyone have any ideas?

Yes...although I don't know what kind of budget you might have in mind for your project.  Please look at the links within the following web-page for the North Dakota Agricultural Weather Network (NDAWN) which monitors 91 independent recording stations for both above and below ground metrics:  https://ndawn.ndsu.nodak.edu/help-equipment.html

In particular, they provide links to the vendor sites for equipment that would be able to provide the data in which you are interested.  I'm pretty sure the data from each station is linked via cellular signal to a master database for recording, although I can't recall the time intervals between each recorded datapoint.  At the site homepage ( https://ndawn.ndsu.nodak.edu/ )  you can click on the various locations to see what kind of information is recorded and in what format it is provided...within each site link there is an additional link for 'hourly data'.   Hoping this is of some use...Good luck!