Average temperatures, rainfall and packing tips for Denver, United States in December
December in Denver is typically cool, with average daytime highs around 9°C and nights near -3°C. Temperature-wise it sits mid-range for Denver (the 9th warmest month).
Rainfall is light in December: roughly 5 mm across the whole month, typically the driest month of the year.
If your dates are flexible, the most comfortable months in Denver are usually September.
← Denver weather tomorrow (live)
In December, Denver averages a daytime high of about 9°C and a night-time low of around -3°C, based on recent historical data.
Rainfall is light in December: roughly 5 mm across the whole month, typically the driest month of the year.
December is a workable time to visit Denver, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Denver are usually September.