Boulder, Colorado Weather:
Saturday, September 5, 2026
Partly Sunny with Showers
Day 90°
Night 63°
Precipitation 60 %
Wind 4 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (September 5, 2025)
Cloudy Night

Day

64°

Night

48°

Wind

4 mph

Precipitation

3 %