Denver Weather in December
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Denver sees average temperatures ranging from a low of -5.2°C (22.6°F) to a high of 8.2°C (46.8°F), with a mean of 0.5°C (32.9°F). Compared to the annual average of 10.0°C (50.0°F), this month is 9.5°C cooler than the yearly norm. Precipitation averages 16.4mm, making it approximately 17.0mm drier than the monthly average of 34.0mm. This is the driest month of the year, with just 16.4mm of precipitation. The city receives an average of 7.8 hours of sunshine per day during December, with relative humidity averaging 53.0%. Wind speeds reach an average maximum of 16.0 km/h. Snowfall averages 9.7cm during December, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in Denver, with drier-than-average conditions compared to the rest of the year.
Denver's mile-high altitude creates a unique climate with low humidity and intense sunshine. I've studied the data and found that the city receives over 300 days of sunshine annually, making it one of the sunniest major US cities. The best time for outdoor activities is May to October, when temperatures are warm and the Rocky Mountains are accessible. The winters are cold but dry, with plenty of sunshine.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 3.6°C (38.5°F) | 0.5°C (32.9°F) | -2.8°C (27.0°F) |
| Rainfall | 19.9mm | 16.4mm | 18.7mm |
| Sunshine | 8.4 hrs | 7.8 hrs | 7.7 hrs |
| Humidity | 52.9% | 53.0% | 60.7% |
| Wind | 15.8 km/h | 16.0 km/h | 15.9 km/h |
| Rainy Days | 4.6 | 1.8 | 1.0 |
| Snowfall | 9.9 cm | 9.7 cm | 12.9 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Denver in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Denver in December?
The average temperature in Denver during December ranges from -5.2°C (22.6°F) to 8.2°C (46.8°F), with a mean of 0.5°C (32.9°F).
How much does it rain in Denver in December?
Denver receives an average of 16.4mm of precipitation in December, spread across approximately 1.8 rainy days. This is the driest month of the year.
What should I pack for Denver in December?
Based on December weather data, pack heavy winter clothing, thermal layers, and a warm coat.
Is December a good time to visit Denver?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Denver
Cities with Similar December Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 39.74°, -104.99°. Timezone: America/Denver. Last updated: 2026-07-30.