Calgary Weather in December
Canada · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Calgary sees average temperatures ranging from a low of -11.5°C (11.3°F) to a high of -2.5°C (27.5°F), with a mean of -7.0°C (19.4°F). Compared to the annual average of 4.6°C (40.3°F), this month is 11.6°C cooler than the yearly norm. Precipitation averages 23.6mm, making it approximately 17.0mm drier than the monthly average of 41.0mm. The city receives an average of 4.8 hours of sunshine per day during December, with relative humidity averaging 71.5%. Wind speeds reach an average maximum of 18.1 km/h. Snowfall averages 15.6cm during December, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in Calgary, with drier-than-average conditions compared to the rest of the year.
Calgary's high altitude and continental position create a climate with wide temperature ranges. I've studied the Chinook winds that provide dramatic winter warming, sometimes raising temperatures by 20°C in hours. The best time for visiting is June to August, when the weather is warmest and the nearby Rocky Mountains are accessible for hiking.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | -2.6°C (27.3°F) | -7.0°C (19.4°F) | -7.3°C (18.9°F) |
| Rainfall | 24.2mm | 23.6mm | 12.4mm |
| Sunshine | 5.5 hrs | 4.8 hrs | 6.0 hrs |
| Humidity | 67.8% | 71.5% | 70.3% |
| Wind | 18.8 km/h | 18.1 km/h | 18.8 km/h |
| Rainy Days | 1.8 | 2.2 | 1.2 |
| Snowfall | 15.7 cm | 15.6 cm | 8.0 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Calgary 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 Calgary in December?
The average temperature in Calgary during December ranges from -11.5°C (11.3°F) to -2.5°C (27.5°F), with a mean of -7.0°C (19.4°F).
How much does it rain in Calgary in December?
Calgary receives an average of 23.6mm of precipitation in December, spread across approximately 2.2 rainy days.
What should I pack for Calgary in December?
Based on December weather data, pack heavy winter clothing, thermal layers, and a warm coat.
Is December a good time to visit Calgary?
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 Calgary
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: 51.05°, -114.07°. Timezone: America/Edmonton. Last updated: 2026-07-30.