Boulder, Colorado Weather:
Wednesday, September 9, 2026
Stormy Weather
Day 81°
Night 55°
Precipitation 65 %
Wind 4 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (September 9, 2025)
Stormy Weather

Day

86°

Night

55°

Wind

6 mph

Precipitation

49 %