Thornton, Colorado Weather:
Tuesday, September 8, 2026
Sunny with a Chance of Thunderstorms
Day 86°
Night 57°
Precipitation 65 %
Wind 5 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (September 8, 2025)
Cloudy Night

Day

88°

Night

57°

Wind

7 mph

Precipitation

25 %