If you have a Mac that runs all the time, you can use WeatherSnoop as described here:
How do I use Wunderground with my Rachio?
Or if you have a linux machine (Like a NAS), you can use the tool that johnny2678 built here: github - wupws. That’s what I did and I have it pulling data every 3 minutes and uploading to a cloned PWS on pwsweather.com
It’s described in this forum post