For those of you still experiencing an issue, I posted this on the Wunderground apicommunity thread:
So, the certificate isn't verifiable due to authority trust. Easily identifiable with wget or curl. It would appear that the certificate authority ("DigiCert SHA2 Secure Server CA") is not trusted with at least some of the Linux distributions. It is trusted in current MacOs. ----- denny ~ $ wget https://rtupdate.wunderground.com/weatherstation/updateweatherstation.php --2020-01-31 08:28:41-- https://rtupdate.wunderground.com/weatherstation/updateweatherstation.php Resolving rtupdate.wunderground.com... 169.60.133.170, 169.47.111.58, 52.116.188.166 Connecting to rtupdate.wunderground.com|169.60.133.170|:443... connected. ERROR: cannot verify rtupdate.wunderground.com's certificate, issued by 'CN=DigiCert SHA2 Secure Server CA,O=DigiCert Inc,C=US': Unable to locally verify the issuer's authority. To connect to rtupdate.wunderground.com insecurely, use `--no-check-certificate'. denny ~ $ curl https://rtupdate.wunderground.com/weatherstation/updateweatherstation.php curl: (60) SSL certificate problem: unable to get local issuer certificate More details here: https://curl.haxx.se/docs/sslcerts.html curl failed to verify the legitimacy of the server and therefore could not establish a secure connection to it. To learn more about this situation and how to fix it, please visit the web page mentioned above. denny ~ $ -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/6f2decf9-4c1a-48f6-8a88-6eac8f15c62e%40googlegroups.com.