SIMPLE: just remember Edgar Allen Poe's words:
"DON'T BELIEVE ANYTHING YOU HEAR, AND ONLY HALF OF WHAT YOU SEE".
"Honest News Source" is an oxymoron.
In cases where actual EVENTS are reported, the "news" is probably factual.
In cases where "Commentary", or "Analysis" are presented, it's best to mute the sound, so that the "Talking head's opinions" won't poison your perceptions.
Just assume that the "news" and the "Weather reports" are on the same level of accuracy, except that the Weather reports have a greater chance of being factual.