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Thornton, Colorado Weather:
Wednesday, September 17, 2025
Cloudy WeatherCloudy weather, overcast skies with clouds.
Day 77°
Night 52°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 11

Weather Forecast History

Last Year's Weather on This Day (September 17, 2024)

Sunny with a Chance of ThunderstormsSunny weather with a possibility of isolated thunderstorms developing later in the day.

Day

84°

Night

50°

Wind

12 mph

UV Index

6

Precipitation

80