The easiest way is to use a cron-job to to the job for you.
A google search for "free cron jobs " results multiple possibilities.
You select a cron job provider
enter the url to be executed:
http://www.kstwx.net/index.php or any other page of your site,
set the frequency, once a day, or every so many minutes
and the cron provider will execute that url at the set frequency.
Example
https://www.easycron.com/user/register allows 200 executions of your set URL per day. That is every ten minutes every day.
And there are multiple other also to choose from.
Maybe you provider also allows cron-jobs but often the setup is more difficult and the frequency allowed is less attractive. But that differs for every provider.
Wim