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Thornton, Colorado Weather:
Wednesday, December 17, 2025
Cloudy Weather
Day 64°
Night 27°
Precipitation 22 %
Wind 13 mph
UV Index (0 - 11+) 2
Weather Forecast History
Last Year's Weather on This Day (December 17, 2024)
Partly Sunny with Showers

Day

52°

Night

25°

Wind

12 mph

UV Index

2

Precipitation

69 %