Climate and Weather · Kalshi ·July 31, 2026 ·Edited by Samuel Jo

Denver's monsoon storms push July rainfall toward 1-inch mark

Denver is closing out a July shaped by extremes: a mid-month heat advisory, the return of the North American monsoon, and most recently a severe thunderstorm watch for the metro area and Eastern Plains that raised the prospect of ping-pong-ball-sized hail. CBS and Yahoo both flagged the monsoon's comeback earlier in July, and by late month KDVR and the Denver Post were tracking near-daily afternoon storms. The question now is whether all that moisture has pushed CLIDEN's monthly precipitation total above 1 inch — the threshold for resolution on July 31. Traders put the odds of that outcome at 74%, a level that squares with the storm-heavy coverage even as the market's position has swung back and forth over the past weeks.

Background

Denver sits in the High Plains at the foot of the Rockies, where summer rainfall depends heavily on the North American monsoon — a seasonal wind shift that draws moisture northward from the Gulf of California and the Gulf of Mexico, typically peaking in July and August. Without it, Front Range summers are dry; with it, brief but intense afternoon thunderstorms can dump significant water in a single event. The CLIDEN station serves as Denver's official climate-monitoring site, and its monthly total is what determines whether July 2026 exceeds the 1-inch mark. Denver's long-term July average precipitation is roughly 1.5 to 2 inches, meaning a normal monsoon month clears the bar comfortably — but dry years can fall well short.

The precedent

• Denver's long-term average July precipitation is approximately 1.5 to 2 inches, meaning a normal monsoon month typically exceeds 1 inch
• The North American monsoon typically peaks in July and August, bringing the bulk of Denver's summer rainfall

Context compiled by Crowdtells from the public record — verify before relying on it.

What to watch

Resolution comes at month's end, July 31, when CLIDEN's official precipitation total for July 2026 is finalized. Watch for any additional afternoon or evening storms in the Denver metro on the final day — even a modest downpour could push a borderline total above 1 inch. The National Weather Service's ongoing severe-thunderstorm watches for the region suggest more moisture is in play.

AI-written briefing grounded in 5 sources and the live market, edited by Samuel Jo. Odds are crowd probabilities, not advice — how this works.