National Weather Service Forecast Discussion

Thornton Weather Forecast   
Today's Forecast Story   
796
FXUS65 KBOU 152341
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
541 PM MDT Tue Sep 15 2026

.KEY MESSAGES...

- Cooler weather today. Limited shower and storm chances, mostly
  over the higher terrain.

- Temperatures bounce back tomorrow, but then average near or
  even slightly below seasonal normals through next weekend.

- Unsettled pattern rest of this week. Thursday looks like the
  highest opportunity of measurable rain and a locally heavy
  rainfall threat.

&&

.DISCUSSION /Through Tuesday/...
Issued at 256 PM MDT Tue Sep 15 2026

Temperatures across our entire CWA are currently in the 60s and 70s,
with even cooler readings at mountain peaks and ridges, a reminder
that fall is just around the corner. However, the monsoon is not
over just yet, with daily chances for showers and storms persisting
through at least Saturday. Rain chances today remain very low (

NWS BOU Office Area Forecast Discussion