Historical weather data, all-time temperature records, and monthly climate averages for Broomfield, CO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Broomfield runs the full Colorado gamut — historically, highs have swung from a balmy 79° (2005) to lows bottoming out at 14° (1985). On average, expect a 61° high and a chilly 30° low, with an 18% chance of snow still lurking. Spring here is less a season than a negotiation.
Broomfield has seen it all, from a scorching 110° on August 2, 2008, to a brutal -24° on December 22, 1990 — a 134-degree spread that captures Colorado's extremes in one number. The snowiest single day on record dumped 21.8 inches on December 21, 2006, while a summer thunderstorm on August 24, 1992, dropped 2.45 inches of rain in a single day.
Broomfield peaks in the July 9–15 window with average highs of 91°, while early January is the coldest stretch at a modest 45°. If you're chasing dry weather, aim for late summer — the wettest stretch of the year falls in late April, averaging 0.66 inches per week. Spring and early summer bring the most weather drama; by August, it's mostly warm and sunny with the occasional afternoon storm.