Denver just recorded its warmest September ever

• This marks the fourth straight month with hotter- and drier-than-usual conditions, per the NWS report.

Zoom in: There were nine days in September when temperatures reached or exceeded 90 degrees.

What they're saying: "We're seeing a local trend of warming and drying," Bonner tells us, pointing to human-caused climate change as a key factor.

Zoom out: Denver's five hottest Septembers on record have all been since 2015. That year held the previous peak, when the average reached 69.4 degrees.

What's next: Despite Tuesday's temporary cooldown, more record-breaking heat is expected this week, according to NWS forecasters.