NewsNoticias Tampa Bay (Univision)September 2, 2026Hillsborough
Historical weather extremes in Denver during September
September in Denver is characterized by extreme temperature volatility, with historical records showing shifts from triple-digit heat to measurable snowfall within a single week. The month serves as a transitional period where temperatures can range from record highs of 101°F to lows of 17°F.
Read the full story at Noticias Tampa Bay (Univision)Why It Matters
Residents in Denver experience significant climate unpredictability in September, requiring preparation for both extreme heat and early winter conditions.
Key Facts
- The record high temperature for September in Denver is 101°F, set on September 5, 2020.
- In 2020, Denver dropped from 101°F on September 5 to 31°F and snow on September 8.
- The earliest measurable snowfall in Denver occurred on September 3, 1961, with 4.2 inches.
- The record low temperature for September in Denver is 17°F, recorded on September 29, 1985.
- The snowiest September on record was in 1971, with 17.2 inches of total accumulation.
- The single-day snowfall record for September is 15 inches, set on September 28, 1936.
- The average date for the first measurable snowfall in Denver is October 18.
- Normal high temperatures in Denver drop from 85°F at the start of September to 73°F by the end of the month.
- Normal low temperatures in Denver drop from 55°F at the start of September to 44°F by the end of the month.