December is one of the cooler months of the year in Commerce City, with average highs near 5.6°C and lows around -5.4°C (mean 0.1°C). It is one of the drier months, averaging 22 mm of rainfall and 57% relative humidity across the period.
December is one of the cooler months of the year in Commerce City. Across 45 years of records, the warmest December in Commerce City was 2025 — when the month averaged 5.8°C — while the coldest was 1983 at -5.8°C. Typical December days reach 5.6°C with nights near -5.4°C. The long-term trend is warming, about 0.7°C per decade.
December is one of the drier months in Commerce City, averaging 22 mm of rainfall. The wettest December on record was 2006 with 58 mm, while the driest was 1991 at 5 mm.
Relative humidity in Commerce City during December averages 57%. The most humid December was 1983 at 72%, and the least humid was 2021 at 46%.
December receives about 2.3 kWh/m²/day of solar energy in Commerce City. The sunniest Decembers were 1995, 2001 and 2021, among others at 2.5 kWh/m²/day, and the cloudiest was 1987 at 2.
Average wind speed in Commerce City during December is 2.6 m/s. The windiest Decembers were 1985 and 1996 at 3.2 m/s, while the calmest was 1995 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -1.1°C | 0.1°C | -0.2°C | 0.0°C | 2.8°C | +3.9°C |
| Avg High | 4.2°C | 5.5°C | 5.3°C | 5.6°C | 8.7°C | +4.5°C |
| Avg Low | -6.5°C | -5.3°C | -5.7°C | -5.5°C | -3.2°C | +3.3°C |
| Avg Rain | 29 mm | 18 mm | 22 mm | 21 mm | 22 mm | -7 mm |
December temperatures in Commerce City have risen by about 4.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -25.1°C (1983) to a record high of 23.2°C (2021).
Rainfall in December is one of the drier months, averaging 22 mm, with a wettest year of 58 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.5°C per decade, widening the gap between day and night.
A quieter season to visit Commerce City
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Commerce City. That said, December — with days averaging 5.6°C and nights around -5.4°C (mean 0.1°C) and low rainfall (22 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 12.1°C | 5.8°C | -0.5°C | 20.0°C | -8.1°C | 20 mm | 49% | 3.1 m/s | — |
| 2024 | 10.2°C | 4.1°C | -2.1°C | 17.2°C | -7.6°C | 11 mm | 48% | 2.2 m/s | 2.3 |
| 2023 | 8.3°C | 2.9°C | -2.5°C | 17.1°C | -8.2°C | 19 mm | 52% | 2.7 m/s | 2.2 |
| 2022 | 5.6°C | -0.4°C | -6.4°C | 14.3°C | -22.0°C | 37 mm | 56% | 2.7 m/s | 2.1 |
| 2021 | 9.8°C | 3.4°C | -2.9°C | 23.2°C | -10.0°C | 27 mm | 46% | 2.8 m/s | 2.5 |
| 2020 | 6.1°C | 0.7°C | -4.6°C | 18.0°C | -10.3°C | 19 mm | 51% | 2.9 m/s | 2.2 |
| 2019 | 6.2°C | 1.0°C | -4.2°C | 12.7°C | -10.9°C | 18 mm | 56% | 2.5 m/s | 2.3 |
| 2018 | 5.3°C | 0.0°C | -5.2°C | 12.6°C | -15.0°C | 8 mm | 54% | 2.4 m/s | 2.4 |
| 2017 | 8.1°C | 1.8°C | -4.6°C | 17.3°C | -13.0°C | 16 mm | 51% | 2.6 m/s | 2.4 |
| 2016 | 3.8°C | -2.0°C | -7.8°C | 10.6°C | -18.7°C | 33 mm | 59% | 2.5 m/s | 2.4 |
| 2015 | 4.6°C | -0.6°C | -5.9°C | 15.3°C | -13.3°C | 23 mm | 59% | 2.5 m/s | 2.3 |
| 2014 | 5.5°C | 0.3°C | -5.0°C | 16.2°C | -20.3°C | 25 mm | 61% | 2 m/s | 2.1 |
| 2013 | 4.4°C | -1.4°C | -7.2°C | 13.9°C | -18.6°C | 16 mm | 60% | 3 m/s | 2.4 |
| 2012 | 5.6°C | 0.2°C | -5.2°C | 18.4°C | -12.5°C | 17 mm | 54% | 2.3 m/s | 2.1 |
| 2011 | 4.9°C | -0.6°C | -6.1°C | 13.6°C | -15.6°C | 28 mm | 59% | 2.4 m/s | 2.4 |
| 2010 | 7.2°C | 1.6°C | -3.9°C | 14.3°C | -15.7°C | 24 mm | 60% | 2.1 m/s | 2.3 |
| 2009 | 1.6°C | -3.6°C | -8.8°C | 10.7°C | -20.2°C | 24 mm | 59% | 2.7 m/s | 2.2 |
| 2008 | 4.5°C | -1.3°C | -7.2°C | 16.8°C | -16.3°C | 24 mm | 58% | 2.9 m/s | 2.3 |
| 2007 | 3.2°C | -2.2°C | -7.5°C | 16.4°C | -16.0°C | 34 mm | 62% | 2.8 m/s | 2.2 |
| 2006 🌧️ | 5.0°C | -0.3°C | -5.7°C | 16.2°C | -13.8°C | 58 mm | 65% | 2.8 m/s | 2.1 |
| 2005 | 5.4°C | -0.4°C | -6.2°C | 16.7°C | -18.5°C | 21 mm | 57% | 3.1 m/s | 2.3 |
| 2004 | 6.8°C | 1.5°C | -3.9°C | 14.3°C | -15.2°C | 14 mm | 57% | 2.9 m/s | 2.4 |
| 2003 | 7.8°C | 2.1°C | -3.6°C | 15.0°C | -7.8°C | 12 mm | 49% | 2.7 m/s | 2.3 |
| 2002 | 7.3°C | 1.9°C | -3.5°C | 14.3°C | -10.5°C | 6 mm | 52% | 2.3 m/s | 2.3 |
| 2001 | 6.8°C | 1.1°C | -4.6°C | 12.7°C | -10.1°C | 10 mm | 51% | 2.5 m/s | 2.5 |
| 2000 | 4.9°C | -0.7°C | -6.2°C | 13.1°C | -13.7°C | 17 mm | 58% | 2.4 m/s | 2.4 |
| 1999 | 6.6°C | 1.5°C | -3.6°C | 17.1°C | -9.3°C | 23 mm | 52% | 2.8 m/s | 2.2 |
| 1998 | 5.6°C | -0.2°C | -6.0°C | 20.1°C | -18.9°C | 25 mm | 57% | 2.6 m/s | 2.2 |
| 1997 | 4.4°C | -0.3°C | -5.0°C | 13.0°C | -9.8°C | 20 mm | 61% | 2.7 m/s | 2.2 |
| 1996 | 5.3°C | -0.1°C | -5.6°C | 14.6°C | -17.1°C | 32 mm | 57% | 3.2 m/s | 2.3 |
| 1995 | 6.9°C | 1.4°C | -4.2°C | 17.2°C | -10.8°C | 18 mm | 56% | 1.9 m/s | 2.5 |
| 1994 | 7.7°C | 2.2°C | -3.3°C | 15.1°C | -10.5°C | 13 mm | 53% | 2.3 m/s | 2.3 |
| 1993 | 5.6°C | 0.3°C | -5.0°C | 13.5°C | -12.7°C | 14 mm | 54% | 2.9 m/s | 2.4 |
| 1992 | 4.1°C | -1.5°C | -7.1°C | 11.9°C | -12.1°C | 20 mm | 62% | 2.4 m/s | 2.4 |
| 1991 | 6.0°C | 0.8°C | -4.4°C | 12.6°C | -11.0°C | 5 mm | 58% | 2.5 m/s | 2.5 |
| 1990 | 3.0°C | -2.8°C | -8.6°C | 16.3°C | -24.2°C | 14 mm | 53% | 2.9 m/s | 2.4 |
| 1989 | 3.5°C | -2.0°C | -7.5°C | 16.2°C | -23.6°C | 27 mm | 59% | 2.9 m/s | 2.3 |
| 1988 | 5.3°C | -0.3°C | -5.9°C | 14.3°C | -14.6°C | 31 mm | 54% | 2.7 m/s | 2.2 |
| 1987 | 3.5°C | -1.6°C | -6.6°C | 17.3°C | -14.3°C | 44 mm | 62% | 2.6 m/s | 2 |
| 1986 | 5.1°C | 0.1°C | -5.0°C | 9.6°C | -14.6°C | 11 mm | 59% | 2 m/s | 2.5 |
| 1985 | 4.1°C | -1.3°C | -6.7°C | 10.9°C | -18.3°C | 26 mm | 64% | 3.2 m/s | 2.2 |
| 1984 | 5.9°C | 0.6°C | -4.8°C | 13.3°C | -11.8°C | 18 mm | 59% | 2.5 m/s | 2.3 |
| 1983 ❄️ | -0.8°C | -5.8°C | -10.8°C | 8.3°C | -25.1°C | 35 mm | 72% | 2.4 m/s | — |
| 1982 | 4.8°C | -0.7°C | -6.1°C | 13.4°C | -17.9°C | 35 mm | 59% | 2.7 m/s | — |
| 1981 | 6.6°C | 0.7°C | -5.2°C | 17.1°C | -13.8°C | 37 mm | 56% | 2.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 5.6°C with lows near -5.4°C (mean 0.1°C), based on 45 years of NASA POWER data.
December averages 22 mm of rainfall in Commerce City, one of the drier months. The wettest on record was 58 mm in 2006.
The hottest December reached 23.2°C in 2021. The coldest dipped to -25.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 4.5°C. Daytime highs moved from 4.1°C to 9.2°C and overnight lows from -6.7°C to -2.9°C over the same span.
December is one of the cooler months of the year in Commerce City and one of the drier months, so plan for around 5.6°C daytime highs and -5.4°C at night.
Not quite — December is the 2nd coolest month in Commerce City, averaging 0.1°C.
For December in Commerce City, pack warm layers and a jacket for chilly mornings, with typical highs of 5.6°C and lows of -5.4°C.
Relative humidity in December averages 57% — moderately humid.
Average wind speed in December is 2.6 m/s. The windiest December on record averaged 3.2 m/s (1985).
The wettest December on record was 2006 with 58 mm. On average, December sees 22 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Commerce City behaves each December, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for December specifically, along with year-by-year records and how the month has changed over the decades.
