Colorado Braces for Record-Breaking March Heat Wave

Temperatures expected to surge into the 80s, raising fire danger concerns

Mar. 17, 2026 at 2:05am

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A powerful heat wave is rolling into Colorado, with temperatures forecast to reach near or above 80 degrees by the middle of the week. The intense heat is expected to last through the weekend, shattering long-standing March records and exacerbating the region's ongoing drought and fire danger.

Why it matters

This historic heat wave comes at a time when Colorado is already grappling with dry conditions, raising the risk of wildfires and further straining water resources. The extreme temperatures are highly unusual for March and could have significant impacts on agriculture, energy demand, and public health.

The details

The heat surge will begin on St. Patrick's Day, with highs rising nearly 20 degrees above normal. Parts of northern and northeastern Colorado will face elevated fire danger on Tuesday, with a red flag warning in effect due to low humidity and gusty winds. From Wednesday through the weekend, many areas are expected to see highs in the 80s, potentially breaking the all-time March record of 84 degrees set in Denver in 1971.

  • On St. Patrick's Day (March 17), highs will rise nearly 20 degrees above normal.
  • A red flag warning is in effect on Tuesday, March 17 from 10 a.m. to 8 p.m. for parts of northern and northeastern Colorado.
  • The record-breaking heat wave is expected to last from Wednesday, March 18 through Saturday, March 21.

The players

Denver

The city of Denver, Colorado, which holds the record for the hottest March temperature of 84 degrees set in 1971.

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What’s next

Meteorologists are closely monitoring the situation and warn that the prolonged heat wave could further exacerbate drought conditions and increase the risk of wildfires in the region.

The takeaway

This extreme heat wave in March is a stark reminder of the impacts of climate change, and underscores the need for Colorado to be prepared for more frequent and intense weather events in the years to come.