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Thornton, Colorado Weather:
Monday, December 15, 2025
Sunny Weather
Day 61°
Night 39°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 2
Weather Forecast History
Last Year's Weather on This Day (December 15, 2024)
Cloudy Night

Day

54°

Night

23°

Wind

11 mph

Precipitation

0 %