However, Boulder's nighttime lows, particularly during winter, are some of the mildest in the state.
Daily average temperatures remain above 32 °F (0 °C) year-round.
There are 4.6 nights annually when the temperature reaches 0 °F (−18 °C).
Out of the total population, 17.4% of those under the age of 18 and 6.0% of those 65 and older were living below the poverty line.
Boulder housing tends to be priced higher than surrounding areas.
The Flatirons are a widely recognized symbol of Boulder.
The primary water flow through the city is Boulder Creek.
The racial makeup of the city was 88.0% White, 0.9% Black or African American, 0.4% Native American, 4.7% Asian, 0.1% Pacific Islander, 3.2% some other race, and 2.6% from two or more races.