Fort Collins Will Shift to Colder Weather October 13

Northern Colorado will see a significant temperature drop and increased rain chances following a stretch of record highs.

Updated on Oct. 12, 2026 in Current Conditions

Fort Collins Will Shift to Colder Weather October 13

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After experiencing unseasonably warm weather with highs reaching 79 degrees or higher for 10 of the first 11 days of October, Fort Collins will transition to cooler conditions beginning October 13, 2026. The forecast indicates daily highs will fall into the 60s, 50s, and 40s alongside a high likelihood of precipitation.

Why it matters

The change marks a sharp end to an early-October heat streak that saw two days reach 90 degrees at the Colorado State University official weather station. Residents should prepare for a rapid decline in temperatures, with rain probabilities peaking at 90 percent on October 14.

Meteorologists forecast a cooling trend with a high of 62 degrees on October 13 and a high of 48 degrees on October 14. Overnight low temperatures are expected to drop to 33 degrees on October 15 and 16.

The players

Colorado State University

This institution hosts the official weather station for the city of Fort Collins.

The details

Following a prolonged period of heat, moisture will move into Northern Colorado, bringing rain chances that climb to 80 percent on the evening of October 13. While temperatures will trend downward, the cold snap is projected to be brief, with highs expected to return to the 70s by October 17.

October 1-11, 2026: Record high temperatures occurred in Fort Collins.
October 13, 2026: Temperatures begin to cool and rain chances increase.
October 14, 2026: High temperatures drop to near 48 degrees.
October 15, 2026: Overnight low temperature expected to be 33 degrees.
October 17-18, 2026: High temperatures return to the 70s.

Seasonal Patterns

This rapid shift from record-breaking heat to near-freezing lows follows the patterns of documentation set by the National Weather Service's extreme temperature threshold reporting during seasonal transitions.

Residents should prepare for freezing overnight temperatures near 33 degrees on October 15 and 16, which may impact sensitive plants or outdoor water systems. Drivers should anticipate hazardous road conditions during the period of high rain probability on October 14.

The takeaway

The forecasted temperature drop highlights the volatile nature of autumn in Northern Colorado following a period of persistent heat. Residents should anticipate a return to warmer weather within a few days as the system moves through the region.