What is the weather like in Boulder vs Calgary in December?

In December, Boulder averages 10°C high / -4°C low with about 16 mm of rain; Calgary averages 0°C high / -12°C low with about 17 mm.

Boulder vs Calgary in December

Boulder is the better pick in December — 67 vs 38 on SeasonMap's comfort score. Boulder is cold, dry, clean air, while Calgary is freezing, dry, clean air.

Boulder vs Calgary — December climate, side by side

	🇺🇸 Boulder	🇨🇦 Calgary
Comfort score	67/100 (C)	38/100 (F)
Feels-like high	7°C	-5°C
Avg high / low	10° / -4°	0° / -12°
Rainfall	16 mm	17 mm
Rainy days	2	4
Humidity	61%	72%
Air quality (AQI)	36	35

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Boulder 🇺🇸 United Statescold, dry, clean air · best September67
Calgary 🇨🇦 Canadafreezing, dry, clean air · best August38

Boulder vs Calgary in December — FAQ

Is December better in Boulder or Calgary?: Boulder is the better pick in December — 67 vs 38 on SeasonMap's comfort score. Boulder is cold, dry, clean air, while Calgary is freezing, dry, clean air.
What is the weather like in Boulder vs Calgary in December?: In December, Boulder averages 10°C high / -4°C low with about 16 mm of rain; Calgary averages 0°C high / -12°C low with about 17 mm.